JP2004080737A - Imaging device, imaging method, computer program, and computer-readable recording medium - Google Patents

Abstract

A user can easily select an optimal color space for a captured image when the user selects a color space during imaging.
In a predetermined color gamut, an out-of-gamut area is determined according to an imaging condition or an image generation parameter of a captured image, and the out-of-gamut area is displayed on a screen of a monitor device such as an electronic viewfinder together with an image captured from an image sensor. Is determined and displayed, thereby selecting the optimal imaging conditions and image generation parameters for the captured image in accordance with the color gamut of the color space and the color reproduction range of the output device and the like set at the time of imaging. It becomes possible. In addition, even in the case of a recorded image after imaging, an output result to an output device such as a monitor or a printer can be estimated by displaying an out-of-gamut area according to imaging conditions and image generation parameters at the time of imaging. .
[Selection diagram] Fig. 1

Description

【０１０９】
【外２】

【０１１０】
この式でＲＧＢ値をＹｘｙに変換し、図１０で示した色域に入っていれば領域内と判定し、色域に入っていなければ領域外と判定することが可能である。以上のように、撮影時にプリンタやモニタ等の出力デバイスに応じて色再現範囲を表示することで、撮影者が画像出力時の出力結果を推定することが可能となり、また、ユーザは、画像生成パラメータの選択や露出等の撮像条件を撮影時に選択することが容易となる。
【０１１１】
以上の実施例１、２、３の処理の流れを図１２のフローチャートを用いて説明する。
【０１１２】
ユーザがデジタルカメラの撮像動作を開始する。ユーザは、ステップ１１００において、例えば図２、図４、図７に示すように記録する時の色空間や出力したいデバイス（あるいはその色再現範囲）をユーザインタフェース１１２により設定する。ここではユーザが設定しているが、初期設定としてデジタルカメラ側で予め設定されているようになっていてもよい。ステップ１１０１において、露出、測光値、測距位置等の撮像条件や、彩度、階調等の撮像条件や画像生成パラメータを設定する。次に、ステップ１１０２において、撮像素子１０１からの出力信号から撮像画像データを生成し、バッファメモリ１０３に蓄えられた撮像画像データがＥＶＦに表示される。
【０１１３】
そして、ステップ１１０３において、撮像素子１０１から出力されている撮像画像データがステップ１１０１で設定された撮像条件、画像生成パラメータに応じて、前述の判別方法等により色域外領域抽出回路１０７は設定された色空間や出力デバイスの色再現範囲に対する色域外領域を判別する。そして、ステップ１１０４において、色域外領域がある場合、ステップ１１０５においてその色域外領域を撮像画像データとともに図１のように表示をする。そして、ステップ１１０６において、色域外領域が多数存在し、ユーザがＯＫしなかった場合は、ステップ１１０１に戻り、ユーザは撮像条件や画像生成パラメータ、色空間、出力デバイス（あるいはその色再現範囲）の設定を変更し、再び色域外領域を判別し、ユーザは満足するまで設定を変更することが出来る。ステップ１１０４において、色域外領域がない、あるいは色域外領域が少なく、ステップ１１０６においてユーザが満足した場合、ステップ１１０７においてユーザにより撮像ボタンが押されると、ステップ１１０８において、その時設定されている撮像条件／色空間／画像生成パラメータ／出力デバイス（あるいはその色再現範囲）とともに撮像画像データが記録媒体１０６に記録される。
【０１１４】
また、ステップ１１０８では、出力デバイスの色再現範囲、画像生成パラメータが設定されており、プリンタ等の出力デバイスとデジタルカメラが接続されている場合は、記録媒体に記録するのではなく、設定された色域やパラメータに基づき、直接プリンタに撮像画像を出力するようにしてもよい。
【０１１５】
以上のように、撮像時に、設定されている撮像条件や画像生成パラメータに応じて、記録する時の色空間、出力デバイスの色再現範囲における色域外領域を出力あるいは記録前に確認することが可能となる。また、色域外領域があるか否かを撮像時に確認し、設定を変更することが可能になるため、設定された色域に収まるように最適な撮像画像を記録することが出来る。
【０１１６】
また、撮像後のレックレビュー画像、ポストビュー画像等の記録画像に対して色域外領域の判別を行うフローについて、図１３を用いて説明をする。
【０１１７】
ステップ２１０１において、撮像後のレックレビュー画像が所定時間ＥＶＦに表示される、あるいは、記録媒体１０６から読み出したポストビュー画像がＥＶＦに表示される。次にステップ２１０２において、記録時に指定された撮像条件、あるいは画像生成パラメータ応じて、色空間、出力デバイスの色再現範囲に対する色域外領域を判別し、ステップ２１０３において、色域外領域がある場合は、ステップ２１０４において色域外領域の表示を行う。ステップ２１０５において、ユーザが色域外領域を確認することができる。特に、レックレビュー画像時の場合は、ステップ２１０５においてユーザがＯＫしなかった場合は、撮像動作に戻るようにし、また撮像条件等を変更して撮りなおしを行うようにすることが出来るため、ユーザは、色域外領域が発生している画質の悪い状態の撮像画像を記録媒体に記録することを防ぐことができる。また、ここで、新たに画像生成パラメータを最適なパラメータに変更したり、異なる色空間や、異なる出力デバイスを再設定することにより再度、色域外領域を確認し、記録媒体に最適な色空間やパラメータを記録しなおすこともできる。
【０１１８】
以上のように撮像後の画像に対しても撮像時の設定による色域外領域を容易に確認することが出来る。また、設定された色域に収まるように最適なパラメータを新たに記録しなおすことが出来る。
【０１１９】
（本発明の他の実施形態）
前述した実施形態の機能を実現するべく各種のデバイスを動作させるように、該各種デバイスと接続された装置あるいはシステム内のコンピュータに対し、前記実施形態の機能を実現するためのソフトウェアのプログラムコードを供給し、そのシステムあるいは装置のコンピュータ（ＣＰＵあるいはＭＰＵ）に格納されたプログラムに従って前記各種デバイスを動作させることによって実施したものも、本発明の範疇に含まれる。
【０１２０】
また、この場合、前記ソフトウェアのプログラムコード自体が前述した実施形態の機能を実現することになり、そのプログラムコード自体、およびそのプログラムコードをコンピュータに供給するための手段、例えば、かかるプログラムコードを格納した記録媒体は本発明を構成する。かかるプログラムコードを記憶する記録媒体としては、例えばフレキシブルディスク、ハードディスク、光ディスク、光磁気ディスク、ＣＤ−ＲＯＭ、磁気テープ、不揮発性のメモリカード、ＲＯＭ等を用いることができる。
【０１２１】
また、コンピュータが供給されたプログラムコードを実行することにより、前述の実施形態の機能が実現されるだけでなく、そのプログラムコードがコンピュータにおいて稼働しているＯＳ（オペレーティングシステム）あるいは他のアプリケーションソフト等と共同して前述の実施形態の機能が実現される場合にもかかるプログラムコードは本発明の実施形態に含まれることは言うまでもない。
【０１２２】
さらに、供給されたプログラムコードがコンピュータの機能拡張ボードやコンピュータに接続された機能拡張ユニットに備わるメモリに格納された後、そのプログラムコードの指示に基づいてその機能拡張ボードや機能拡張ユニットに備わるＣＰＵ等が実際の処理の一部または全部を行い、その処理によって前述した実施形態の機能が実現される場合にも本発明に含まれることは言うまでもない。
【０１２３】
【発明の効果】
以上説明したように本発明によれば、撮像画像に対する最適な撮像条件や色空間、画像生成パラメータ、最適な色再現範囲をもつ出力デバイスをユーザが容易に選択できるという効果を奏する。
【０１２４】
また、その色域外領域を撮像素子から出力されているＥＶＦ画像とともにに表示することにより、記録するのに最適な色域であるか否かの判断を撮像する時に行うようにすることができ、さらに設定を変更することにより、所定の色域に収まる最適な画像データを得ることができる。
【０１２５】
また、撮像時に設定された撮像条件や画像生成パラメータに応じて色域外領域を判別して表示することにより、例えば、撮像後に記録媒体等に記録されている撮像画像の色域外領域を確認し、最適な画像生成パラメータや出力デバイスを選択することができるという効果を奏する。
【図面の簡単な説明】
【図１】第１の実施の形態を示し、色空間を指定する際の概念を示した図である。
【図２】第１の実施の形態を示し、モニタ装置に表示される色空間選択画面の一例を示した図である。
【図３】第１の実施の形態を示し、ＮＴＳＣとｓＲＧＢの色域を表した図である。
【図４】第２の実施の形態を示し、モニタ装置に表示される画像生成パラメータ選択画面の一例を示した図である。
【図５】第１〜３の実施の形態を示し、撮像装置の回路構成の一例を示したブロック図である。
【図６】第１の実施の形態を示し、ＮＴＳＣとｓＲＧＢとＡｄｏｂｅＲＧＢの色域を表した図である。
【図７】第３の実施の形態を示し、モニタ装置に表示される出力デバイス選択画面の一例を示した図である。
【図８】第３の実施の形態を示し、出力デバイスごとの色再現範囲の差の一例を示した図である。
【図９】第３の実施の形態を示し、撮像装置の回路構成の一例を示したブロック図である。
【図１０】第３の実施の形態を示し、プリンタの色再現範囲特性の例を示した図である。
【図１１】第３の実施の形態を示し、プリンタの色再現範囲特性色度図の例を示した図である。
【図１２】第１〜３の実施の形態の一例を示すフローチャート１である。
【図１３】第１〜３の実施の形態の一例を示すフローチャート２である。
【符号の説明】
１０１　撮像素子
１０２　信号処理回路
１０３　バッファメモリ
１０４　圧縮・伸長回路
１０５　記録・読み出し装置
１０６　記録媒体
１０７　色域外領域判定回路
１０８　表示制御回路
１０９　Ｄ／Ａ変換機
１１０　モニタ表示装置
１１１　システムコントローラ
１１２　ユーザインターフェース
１１３　データメモリ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an imaging apparatus, an imaging method, a computer program, and a computer-readable recording medium, and is particularly suitable for use in imaging a subject and generating or reproducing image data from a captured image.
[0002]
[Prior art]
A color space selection method in a conventional imaging apparatus will be described using a digital camera as an example.
[0003]
In a conventional digital camera, sRGB is generally used as a color space for a recorded image. This is because most of output devices such as monitors and printers are optimized by sRGB.
[0004]
However, these days, it is said that the color gamut that can be expressed in the sRGB color space is narrow, and attempts have been made to solve the problem roughly by the following two methods.
[0005]
First, the first method is a method for preventing a clipping phenomenon from occurring.
As a representative example of this method, Heslet-Packard and the like have proposed esRGB and the like in which the sRGB color gamut is expanded.
[0006]
For example, it is assumed that the luminance signal Y is created by the following (Equation 7).
Y = 0.3R + 0.59G + 0.11G (Equation 7)
In this case, if the saturation of the luminance signal Y (Y = 250) is to be performed with a red hue, the R signal immediately reaches 255, and even if the saturation is further increased, the R signal is increased. Absent. If the saturation is forcibly increased, a clipping phenomenon occurs in which the R signal is stuck at 255, and a "color curving" phenomenon in which the hue changes when the degree is severe is caused.
[0007]
On the other hand, in esRGB, the luminance signal Y is within the range of 8 bits (0 to 255 [0-255]), but the RGB signal is not limited to the range of 0 to 255 [0-255]. That is, in esRGB, even if the luminance signal Y remains at 250, the color gamut can be expanded by recognizing a value of 256 or more for the R signal. In other words, esRGB is a color space that can expand the color gamut by allowing values other than 0 to 255 [0-255] for each RGB signal.
[0008]
However, such an esRGB color space is still in a proposal stage and has not been widely used.
[0009]
On the other hand, the second method is a method that employs a color space in which the RGB original stimuli are defined more widely than sRGB. For example, NTSC (National Television System Committee) and PAL / SECAM (Phase Alternate by Line / Sequential Couleur)
a Memoire), Adobe RGB, and the like.
[0010]
However, images recorded in a wide color space such as Adobe RGB, PAL / SECAM, or NTSC, when displayed on an ordinary monitor for sRGB, have low saturation and become unattractive images. I will. In order to compensate for this, it is necessary to perform color space conversion, which results in a troublesome conversion and a conversion error.
[0011]
Further, in order to prevent the color space from being converted, it is necessary to display an image on an output device dedicated to each color space. In Adobe RGB, PAL / SECAM, and NTSC, since a wider color gamut is expressed by RGB signals in the range of 0 to 255 [0-255], the accuracy of the color gamut is coarser than that of sRGB. turn into.
[0012]
As described above, at present, there is no color space that satisfies all the elements. Under such circumstances, there is an increasing number of devices that perform image recording by selecting a plurality of color spaces, such as a high-end digital camera such as EOS-1D that has already been proposed by the present applicant (for example, see Patent Reference 1).
[0013]
In such a high-end digital camera, when imaging an object in a wide color space, that is, when imaging an object with high saturation, recording is performed using NTSC or Adobe RGB, and otherwise, bit precision is used. The color space is selectively used depending on the application and the subject, such as imaging in sRGB, which does not require color space conversion later.
[0014]
Similarly, there is a method of adjusting image parameters as a method of putting a captured image in a color gamut of a set color space at the time of imaging. More specifically, for example, when imaging an object with high saturation, an image of an object is captured with a setting that is lower in saturation and lower in contrast than usual, and in a case where the object is not low in contrast and is not high in saturation. Is a method of imaging a subject by increasing contrast and saturation. In other words, this is a technique for changing the image generation parameters and the like, particularly the gradation and saturation parameters, so as to fall within the color gamut.
[0015]
Also, in such a method, as in the case of the color space, it is often necessary to perform a retouching operation for adjusting the contrast and saturation according to the photographer's preference after imaging, and the usage and the subject It is necessary to use differently according to.
[0016]
In addition, similar to the above-mentioned method of fitting into the color gamut of the standard color space, there is also a method of outputting the color gamut of a captured image optimally to the color reproduction range and color reproduction characteristics of an output device such as a printer or monitor. I do. For example, if a subject with a high color saturation is targeted for a printer with a wide color reproduction range, output is performed with the same strong saturation. This is a method in which the saturation and the contrast are output in a modest manner. Such a process is an effective method at the time of direct output without intervening a PC, for example, in the case of shooting mainly for directly outputting from a camera to a specific printer.
[0017]
Similarly, there is a method of changing the exposure as a method of storing a captured image in a color gamut of a set color space at the time of imaging. More specifically, for example, when a very high-contrast subject is photographed, the high-luminance portion and the low-luminance portion region in the photographed image are not toned, and the high-luminance region has overexposure and color bend. Also in the luminance region, blackening and color bending also occur. In this method, the exposure is lowered to capture the high-luminance subject area within the color gamut, and the exposure is raised to increase the exposure to capture the low-luminance subject area within the color gamut. .
[0018]
This method is based on the fact that the color space has a narrow color gamut at high and low luminance areas and a wide color gamut at intermediate brightness, and these characteristics are a standard color space. The same applies to individual color gamuts of devices and the like.
[0019]
However, in such a method, since the exposure must be determined at the time of shooting, it is necessary to determine whether or not the image is within the color space at the time of shooting.
[0020]
[Patent Document 1]
JP-A-2002-247375 (p. 6, paragraph (0030) (0099))
[0021]
[Problems to be solved by the invention]
However, in the above-described conventional technology, it is difficult to determine which color space is optimal for a subject to be imaged at the time of imaging, so that it is very difficult to select an optimal color space. There was a point.
[0022]
In other words, the above-described conventional technique uses only one color space after all, and gives a choice between giving up a wide color space or making use of coarseness of accuracy and labor of color space conversion. Had become more and more.
[0023]
Similarly, in selecting an image generation parameter, there is a problem that it is difficult to select an optimum image generation parameter for a subject to be imaged.
[0024]
Similarly, when selecting the optimal color space and image generation parameters for the color reproduction range and color reproduction characteristics of a specific output device, it is difficult to select the optimal image generation parameters for the subject to be imaged. There was a problem.
[0025]
Also, when selecting the optimal exposure for the color reproduction range and color reproduction characteristics of a specific color space and output device, it is similarly difficult to select the optimum imaging conditions for the subject to be imaged. There was a point.
[0026]
The present invention has been made in view of the above-described problems, and enables a user to easily confirm an out-of-gamut region for a captured image in a predetermined color space according to an imaging condition and to select an optimal color space. It is an object to provide an imaging apparatus and an imaging method described above.
[0027]
In order to achieve the above object, the following configuration is provided.
[0028]
[Means for Solving the Problems]
An imaging apparatus for generating image data expressed in a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
For the image data, a determination unit that determines an out-of-gamut region that protrudes from a color gamut of the predetermined color space according to an imaging condition.
An imaging apparatus comprising an out-of-gamut area display unit for displaying the out-of-gamut area.
[0029]
In addition, the following configuration is provided to achieve the above object.
[0030]
An imaging method for generating image data represented by a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
A determining step of determining, for the image data, an out-of-gamut region that protrudes from a color gamut of the predetermined color space according to an imaging condition;
A display step of performing a process of displaying the out-of-gamut region.
[0031]
Another object of the present invention is to allow a user to estimate an output result at the time of image output by confirming an out-of-gamut region corresponding to a color reproduction range of an output device. It is an object of the present invention to provide an imaging apparatus and an imaging method that facilitate selection of image generation parameters and imaging conditions.
[0032]
In order to achieve the above object, an imaging device according to the present invention has the following configuration.
[0033]
An imaging apparatus for generating an image in which a captured image obtained by capturing an object according to an imaging condition designated by a user is expressed in a predetermined color gamut,
Image output device selection means for selecting an image output device for outputting the captured image,
Determining means for determining an out-of-color-gamut region protruding from a reproducible color gamut of the image output device;
And an out-of-gamut area displaying means for displaying the out-of-gamut area determined by the determining means together with the captured image.
[0034]
In order to achieve the above object, an imaging device according to the present invention has the following configuration.
[0035]
An imaging apparatus for generating image data expressed in a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
A color space selection unit for selecting a color space of the image data,
Determining means for determining, for the image data, an out-of-color-gamut area that protrudes from the color gamut of the color space selected by the color-space selecting means;
An out-of-gamut area display unit for displaying the out-of-gamut area together with the captured image.
[0036]
An imaging method for generating image data represented by a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
A determining step of determining, for the image data, an out-of-gamut region that protrudes from a color gamut of the predetermined color space according to an imaging condition;
Having a display step of performing a process of displaying the out-of-gamut region,
An imaging method characterized in that:
[0037]
Further, in order to achieve the above object, an imaging method according to the present invention includes:
An imaging method for generating image data represented by a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
A color space selecting step of selecting a color space of the image data;
A determining step of determining, for the image data, an out-of-gamut area that protrudes from a color gamut of the selected color space;
Displaying the out-of-color-gamut region together with the captured image.
[0038]
Further, in order to achieve the above object, an imaging method according to the present invention includes:
An imaging method for generating image data represented by a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
An image generation parameter selecting step of selecting an image generation parameter for generating image data from the captured image,
And displaying a non-color space area outside the predetermined color space with the captured image with respect to the image data.
[0039]
Further, in order to achieve the above object, the imaging method of the present invention,
An imaging method for generating an image represented by a predetermined color gamut of a captured image of a subject according to an imaging condition designated by a user,
An output device selecting step of selecting an image output device for outputting the captured image,
A determining step of determining an out-of-color-gamut area protruding from a reproducible color gamut of the image output device;
A display step of displaying the out-of-gamut region determined in the determination step together with the captured image.
[0040]
Another object of the present invention is to allow a user to easily select an optimum imaging condition that fits in a predetermined color gamut by determining an out-of-gamut region for a captured image in a predetermined color gamut according to an imaging condition. It is an object of the present invention to provide an imaging method.
[0041]
In order to achieve the above object, an imaging method according to the present invention includes the following steps.
[0042]
A first display step of displaying a captured image;
In a first display step, an imaging parameter setting step of setting an imaging parameter of a next captured image;
Out-of-gamut determination step of determining whether or not the image is within a predetermined color gamut according to the parameters of the imaging parameter setting step,
Having.
[0043]
Another object of the present invention is to allow a user to obtain optimal image data that fits within a predetermined color gamut from a captured image by checking an out-of-gamut region for a predetermined color gamut in a captured image. It is an object to provide an imaging device.
[0044]
In order to achieve the above object, the following configuration is provided.
[0045]
Imaging means for imaging a subject and outputting a captured image signal;
A / D conversion means for A / D converting the captured image signal and outputting image data;
Storage means for temporarily storing the image data converted by the A / D conversion means;
Compression means for compressing the image data stored in the storage means;
An image data input / output unit that records the image data compressed by the compression unit on a recording medium, or reads from the recording medium,
An imaging device having:
Out-of-gamut determination means for determining whether the image data is within a predetermined color gamut,
An image pickup apparatus, comprising: an out-of-gamut area display unit that displays an out-of-gamut area that protrudes from the predetermined color gamut with respect to the image data.
[0046]
Since the present invention is configured as described above as described above,
A subject is imaged according to an imaging condition specified by a user, and a predetermined color gamut is added to a captured image generated in a predetermined color gamut selected from a plurality of color gamuts according to the imaging conditions and image generation parameters. The out-of-gamut area outside the gamut is detected and displayed, so if there are many gamut areas in the image, the settings can be changed immediately on the spot, and optimal imaging for the captured image There is an effect that the user can easily select an output device having a condition, a color space, an image generation parameter, and an optimum color reproduction range.
[0047]
In addition, it is possible to determine whether or not the color gamut set in the captured image is appropriate. By displaying the display together with the EVF image output from the image sensor, the optimum color for recording can be obtained. The determination as to whether or not the image is in the gamut can be made at the time of imaging, and furthermore, there is an effect that optimal image data that fits in the predetermined color gamut can be obtained.
[0048]
Further, in the rec-review image after imaging or the post-view image recorded on the recording medium, the out-of-gamut area is determined and displayed according to the imaging conditions and image generation parameters set at the time of imaging, so that the image is recorded. It is possible to confirm the out-of-color gamut area and select an optimal image generation parameter and output device.
[0049]
BEST MODE FOR CARRYING OUT THE INVENTION
(First Embodiment)
Hereinafter, a first embodiment of an imaging device, an imaging method, a computer program, and a computer-readable recording medium of the present invention will be described with reference to the accompanying drawings.
[0050]
FIG. 1 is a diagram illustrating a concept when a color space is designated using the imaging apparatus 100 according to the present embodiment. Here, the color gamut is
1. The range of reproducible colors that differ for each color space,
2. Different color reproduction ranges and color reproduction characteristics depending on the output device,
Means
[0051]
FIG. 1 shows a state in which an area (out-of-gamut area) that does not fit in the set color space is displayed on a monitor of a camera (a monitor device 110 provided as a display device in the imaging device 100) during imaging. Is shown.
[0052]
In FIG. 1, FIG. 1A shows a case where sRGB is selected as a setting color space, and FIG. 1B shows a case where NTSC (National Television System Committee) is selected as a setting color space.
[0053]
Since the NTSC has a wider color space than sRGB, the area (clip area) outside the color gamut is smaller when NTSC is selected than when sRGB is selected, as shown in FIG. Become.
[0054]
FIG. 3 is a diagram illustrating a color gamut of a color space (sRGB and NTSC) selected by the imaging device 100 according to the present embodiment. Specifically, the gamut of sRGB and NTSC is represented by an xy chromaticity diagram of the CIE XYZ color system. As is clear from this, it can be said that the NTSC color space has a wider color gamut especially in the green direction.
[0055]
FIG. 2 is a diagram showing an example of a color space selection screen displayed on the monitor device 110.
[0056]
As shown in FIG. 2, it is possible to easily select an optimal color space by clearly indicating an area outside the color gamut on the monitor device 110.
[0057]
Next, a circuit configuration of the imaging device 100 according to the present embodiment will be described. FIG. 5 is a block diagram illustrating an example of a circuit configuration of the imaging device 100 according to the present embodiment.
[0058]
5, a signal output from an image sensor 101 is generated as an image by a signal processing circuit 102 and stored in a buffer memory 103 as a captured image.
[0059]
When an image is recorded on the recording medium 106, the captured image in the buffer memory 103 is sent to a compression / expansion circuit 104 where the image is compressed, and written to the recording medium 106 by a recording / reading device 105. Recorded.
[0060]
On the other hand, the captured image stored in the buffer memory 103 is sent to the display control circuit 108 as an image to be displayed on an EVF (electronic viewfinder). Further, the image stored in the buffer memory 103 is extracted by the out-of-gamut region extracting circuit 107 into an out-of-gamut region, and sent to the display control circuit 108 as an out-of-gamut region extracted image.
[0061]
The display image and the out-of-gamut region extraction image are combined by the display control circuit 108, and image-converted for display on the monitor display device 110, and then converted by the D / A converter (D / A converter) 109. A conversion is performed and displayed on the monitor device 110. With such a circuit configuration, it is possible to realize display of an out-of-gamut region in a color space set by a user. When a different color space is selected by the user via the user interface 112, the system controller 111 reads a parameter set corresponding to each color space from the data memory 113 and sets the parameter set in the signal processing circuit 102.
[0062]
Next, a method of determining a region outside the color gamut performed by the outside color gamut determination circuit 107 will be described.
[0063]
Generally, a JPEG (Joint Photographic Experts Group) format is used as an output format of a digital camera. In the JPEG format, color information is stored in a format of YCrCb.
[0064]
Conversion from the RGB format to the YCrCb format is defined by the following (formula 1) to (formula 3).
Y = 0.3000 * R + 0.5900 * G + 0.1100 * B (1 formula)
Cr = (R−Y) * 0.713 (2 formulas)
Cb = (BY) * 0.564 (3 formulas)
Here, Y is a luminance signal, R is an R (Red) signal, G is a G (Green) signal, B is a B (Blue) signal, Cr is a color difference signal (= R signal−luminance signal), and Cb is a color difference signal ( = B signal-luminance signal).
[0065]
On the other hand, conversion from the YCrCb format to the RGB format is represented by the following equations (4) to (6).
R = Y + 1.40 * Cr (4 formulas)
G = Y-0.71Cr-0.33Cb (Equation 5)
B = Y + 1.77 * Cb (Equation 6)
Hereinafter, conversion from the YCrCb format to the RGB format will be described with specific numerical values.
[0066]
For example, if the luminance signal Y is 106, the chrominance signal Cr is 103, and the chrominance signal Cb is -49, the R signal is 250, the G signal is 50, and the B signal is 50 from the above equations (4) to (6). It becomes 20.
(Y, Cr, Cb) = (106, 103, −49) → (R, G, B) = (250, 50, 20)
In the case of a subject having a high saturation with respect to this color, for example, if the value of the color difference signals Cr and Cb is 1.5 times the above-described value, the R signal is 322, the G signal is 21, and the B signal is-. It will be 25.
(Y, Cr, Cb) = (106, 154, −74) → (R, G, B) = (322, 21, -25)
As can be seen from this example, even if the value of the luminance signal Y is in the range of [0-255] from 0 to 255, the value of the R signal, the G signal, and the B signal becomes 0 when the subject has strong saturation. To 255 may not be in the range [0-255]. This indicates that the captured image is not within the color gamut of the designated color space.
[0067]
Therefore, in the present embodiment, determination as to whether or not the captured image is within the color gamut of the designated color space is performed as follows. That is, when the luminance signal Y, the chrominance signal Cr, and the chrominance signal Cb (YCrCb data) are converted into the R, G, and B signals (RGB data), the R, G, and B signals (RGB data) are converted. ) Are all in the range of [0-255] from 0 to 255, and if they do not fall within the range of [0-255] from 0 to 255, they are out of the color gamut. Is displayed on the screen.
[0068]
The display is performed by blinking an area outside the color gamut or enclosing the area with a broken line. Of course, other methods such as a warning display using characters may be used.
[0069]
Then, for example, when there are many areas (clip areas) outside the color gamut of the set color space in the captured image, the user specifies the color space via the user interface 112, and immediately The color space settings can be changed. By displaying an area outside the color gamut of the color space (out-of-color space area) in this manner, it is determined whether or not the specified color space is appropriate. In particular, the specified color space is optimal for recording an image. It is possible to easily determine whether or not a color space exists, and to obtain a captured image in an optimal color space.
[0070]
In this embodiment, the case of NTSC and sRGB has been described as an example, but other color spaces may be applied. For example, Adobe RGB and PAL / SECAM (Phase Alternate by Line / Sequential) may be used. Needless to say, it may be Couleur a Memoire) or esRGB.
[0071]
Here, Adobe RGB is a color space used in retouching software commercialized by Adobe, Photoshop, and the like, and is a color space often used in the printing industry and the like.
[0072]
The chromaticity point of the Adobe RGB color space is
R (0.64, 0.33)
G (0.21, 0.71)
B (0.15, 0.06)
It is.
[0073]
The chromaticity point in the sRGB color space is
R_ (0.64,033)
G (0.3, 0.6)
B (0.15, 0.06)
The chromaticity point in the NTSC color space is
R_ (0.67,033)
G (0.21, 0.71)
B (0.14, 0.08)
It is.
[0074]
FIG. 6 shows the color gamut of the sRGB, NTSC, and Adobe RGB color spaces.
[0075]
As described above, when esRGB, Adobe RGB, or PAL / SECAM having a wide color gamut is used as a color space, a region (clip region) outside the color gamut of the color space is reduced, and thus a color for determining an optimal color space is obtained. The number of times of space selection can be reduced.
[0076]
In addition, as in the present embodiment, when an out-of-gamut region of the set color space is displayed at the time of EVF (electronic viewfinder) at the time of imaging (a state in which a signal is output from the image sensor), the optimal color is obtained. This is effective because the space can be determined at the time of imaging.
[0077]
In the present embodiment, the optimal color gamut and color space are selected at the time of imaging by using the EVF in a state where the signal from the image sensor is output. Needless to say, a configuration may be adopted in which the out-of-gamut region is displayed at the time of post-view in which the captured image is read out from the recording medium or the like after the image capturing and viewed. In other words, the same processing as described above can be performed when displaying after imaging, such as during the rec review or post-view. That is, when there are a large number of out-of-gamut regions (clip regions) in the color space designated at the time of imaging in the recorded image, the out-of-gamut region is displayed, and the color space for the recorded image is immediately changed on the spot. Make it possible to change the settings.
[0078]
By displaying an area outside the color gamut of the color space in this manner, it is possible to easily determine whether the color space set for the recorded image is appropriate, and the recorded image can be recorded in the optimal color space. Can be generated or developed.
[0079]
As described above, in the present embodiment, at the time of or after the imaging of a subject, it is determined whether or not all of the RGB data is within the range of 0 to 255, so that the set color space can be determined from the subject image. Is detected and the detected out-of-gamut region of the set color space is displayed on the screen, so that the user can easily select an optimal color space based on the display. Therefore, by using the imaging device 100 of the present embodiment, it is possible to easily set an optimal color space for a subject.
[0080]
Further, when there are many out-of-gamut regions in the image, which are regions outside the color gamut of the color space selected by the user, it is possible to immediately change the recording color space on the spot.
[0081]
By displaying the area outside the color space in this way, the user can determine whether the color space designated for image recording for the subject is appropriate. In particular, by displaying the display on an EVF image, it is possible to determine the optimal recording color space when capturing an image.
[0082]
Further, according to another embodiment, by displaying the area outside the color space in this way, the user can image the determination of the optimal recording color space by displaying the display on an EVF image. Sometimes it can be done.
[0083]
(Second embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the accompanying drawings. The hardware configuration of the imaging device according to the present embodiment is the same as that of the imaging device 100 according to the first embodiment described above. That is, the items set by the user differ between the imaging device of the present embodiment and the imaging device 100 of the first embodiment. Therefore, the same parts as those in the above-described first embodiment are denoted by the same reference numerals as those in FIG. 1, and the detailed description is omitted.
[0084]
FIG. 4 is a diagram illustrating an example of an image generation parameter selection screen displayed on monitor device 110 of imaging apparatus 100 according to the present embodiment.
[0085]
As described above, since the circuit configuration of the imaging device 100 of the present embodiment is the same as that of the above-described first embodiment, detailed description will be omitted. Hereinafter, only the differences will be described.
[0086]
In the first embodiment, the item set by the user via the user interface 112 is the color space, but in the present embodiment, the item is an image generation parameter (image parameter). This image generation parameter is a parameter for adjusting the image quality (saturation and gradation) of the captured image, and more specifically, the image quality of the captured image read from the buffer memory 103 shown in FIG. Is a parameter for adjusting.
[0087]
The same applies to a case where the user sets imaging conditions at the time of imaging in addition to the image generation parameters. For example, exposure, photometric value, distance measurement position, white balance setting at the time of imaging, and the like. The exposure is an ISO sensitivity setting set at the time of image capturing, output gain control from an image sensor, or the like. The ISO sensitivity setting may be performed before or after the white balance processing.
[0088]
Hereinafter, an example in which the captured image goes out of the color gamut when the saturation is increased based on the user's specification will be specifically described using numerical values.
[0089]
For example, if the luminance signal Y is 106, the chrominance signal Cr is 103, and the chrominance signal Cb is -49, the R signal is 250, the G signal is 50, and the B signal is 50 from the above equations (4) to (6). It becomes 20.
(Y, Cr, Cb) = (106, 103, −49) → (R, G, B) = (250, 50, 20)
In the case of a subject having a strong parameter for enhancing the saturation of this color, for example, if the saturation of the color difference signals Cr and Cb is increased by 1.5 times, the R signal is 322, the G signal is 21, and the B signal is Becomes -25.
(Y, Cr, Cb) = (106, 154, −74) → (R, G, B) = (322, 21, -25)
As can be seen from this example, even if the value of the luminance signal Y is in the range of [0-255] from 0 to 255, if the saturation becomes a strong parameter, the values of the R signal, G signal, and B signal (RGB) Value) does not fall between 0 and 255 [0-255].
[0090]
In this case, if the values (RGB values) of the R signal, the G signal, and the B signal (RGB values) are directly displayed on a personal computer PC or the like, the R signal becomes 255, the G signal becomes 21, and the B signal becomes 0.
(R, G, B) = (322, 21, -25) → (R, G, B) = (255, 21, 0)
Therefore, if the saturation enhancement is performed on the captured image before the saturation is increased, a disadvantage that the hue is obviously changed occurs.
[0091]
Therefore, in the present embodiment, as shown in FIG. 4A, an area outside the color gamut is displayed on the screen of the monitor device 110 during imaging. This makes it easy for the user to select an image generation parameter (a saturation parameter for adjusting the saturation) to have an appropriate value.
[0092]
As described above, in the present embodiment, an area outside the color gamut (clip area) is displayed to allow the user to select an image generation parameter (for example, a saturation parameter). In some cases, it is possible to immediately change the image generation parameters on the spot. Therefore, the user can immediately adjust the image quality (for example, saturation) to an appropriate value on the spot based on the display content. This makes it possible to easily set the optimal image generation parameters for the subject image, particularly, the optimal image generation parameters for recording the subject image, and to easily and appropriately generate or develop image data for the subject. it can.
[0093]
In the present embodiment, a case has been described in which a saturation parameter is selected as an image generation parameter. However, as shown in FIG. 4B, a gradation parameter may be selected. Needless to say, the user may be allowed to select the image generation parameter. That is, the image parameters (image generation parameters) may be any parameters as long as they are parameters for adjusting image quality.
[0094]
Also in the present embodiment, not only during EVF (Electronic View Finder) (at the time of imaging), but also at the time of a rec review displayed after imaging or at the time of post-viewing after imaging, an area outside the color gamut is displayed to generate an image. It goes without saying that a parameter (image parameter) may be selected. The image generation parameters are parameters for adjusting the image quality (saturation, gradation, etc.) of the recorded image read from the recording medium 106 shown in FIG.
[0095]
In other words, if there are many areas outside the color gamut of the color space (clip areas) in the recorded image after imaging, the area outside the color gamut is displayed, and the setting of the image generation parameters is immediately changed on the spot. It becomes possible to do.
[0096]
By displaying the area outside the color gamut of the color space in this manner, it is possible to easily determine whether or not the image generation parameters set for the recorded image are appropriate. Can be generated or developed.
[0097]
By displaying the area outside the color space in this way, it is possible to determine whether the image parameters for the subject are appropriate. In particular, by displaying the display on an EVF image, it is possible to determine the optimal image generation parameter to be recorded when capturing an image.
[0098]
(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 9 is a block diagram illustrating a configuration of a signal processing unit of the imaging device according to the present embodiment.
[0099]
The circuit configuration of the imaging device 100 of the present embodiment is the same as that of the above-described first embodiment, and thus a detailed description is omitted. Hereinafter, only the differences will be described.
[0100]
In FIG. 9, an output device is set by the user interface 112. The color reproduction characteristic is selected from the output device color reproduction characteristic data 114 according to the set output device type, and transmitted to the out-of-gamut region extraction circuit 107 as output device color gamut information. Further, the out-of-gamut area extracting circuit 107 can compare the information with the image data from the buffer memory 103 to extract the out-of-gamut area.
[0101]
Further, here, the output device color reproduction characteristic data is held in the imaging device, but it may be obtained by communication means when the imaging device is connected to an output device such as a monitor or a printer. Thus, color reproduction characteristic data corresponding to each output device can be obtained when necessary. Alternatively, the information may be read from a removable recording medium or the like. For the selection of the color reproduction characteristic data, a plurality of color reproduction characteristic data may be stored in a recording medium, and a selection may be made from among them. Alternatively, different color reproduction characteristic data may be stored in each recording medium, and the storage medium may be replaced. You may make it read.
[0102]
FIG. 7 is a diagram illustrating an example of an output device selection screen displayed on the monitor device 110 of the imaging device 100 according to the present embodiment. In the first embodiment, the item set by the user via the user interface 112 is the color space, but in the present embodiment, the item is the output device selection screen.
[0103]
FIG. 8 is a conceptual diagram showing that there is a difference in color reproduction range for each output device.
Generally, the color reproduction range differs between different devices such as a printer and a monitor, and the color reproduction range also differs between the same printers depending on the type of ink, the printing method such as the sublimation type and the inkjet method, and the like. Therefore, by displaying the color reproduction range according to the output device at the time of shooting, the photographer can estimate the output result at the time of image output, thereby selecting image generation parameters, exposure conditions, etc. at the time of shooting. It becomes easier.
[0104]
FIG. 10 and FIG. 11 are diagrams showing the color reproduction range characteristics of the selected output device and the chromaticity diagram thereof. In this example, since the color reproduction range is expressed by a triangle, the color reproduction range in the output device is indicated by giving the three chromaticity values of the vertices for each luminance.
[0105]
In the third embodiment, the (EX, Y, x, y) format of the CIEXYZ color system is used, but it goes without saying that the CIE L * a * b * color system and other color formats may be used.
[0106]
Further, in the third embodiment, the luminance value is expressed only in increments of 10; however, a reproduction range with finer luminance values may be specified, or the reproduction range may be estimated by interpolating between them. Needless to say, it is good.
[0107]
Next, an out-of-gamut region determination method in the out-of-gamut region extraction circuit 107 will be described.
[0108]
The following is a conversion formula for converting a signal in the sRGB color space into the Yxy format of the CIEXYZ color system.
RsRGB '= R8bit ÷ 255
GsRGB ′ = G8bit ÷ 255
BsRGB ′ = B8bit ÷ 255
if
RsRGB = RsRGB ′ ÷ 12.92, RsRGB ′ ≦ 0.03928
GsRGB = GsRGB ′ ÷ 12.92, GsRGB ′ ≦ 0.03928
BsRGB = BsRGB ′ ÷ 12.92, BsRGB ′ ≦ 0.03928
Else
RsRGB = ((RsRGB ′ + 0.055) ÷ 1.055) ＾ (2.4), RsRGB ′> 0.03928
GsRGB = ((GsRGB ′ + 0.055) ÷ 1.055) ＾ (2.4), GsRGB ′> 0.03928
BsRGB = ((BsRGB ′ + 0.055) ÷ 1.055) ＾ (2.4), BsRGB ′> 0.03928
[Outside 1]

[0109]
[Outside 2]

[0110]
The RGB values are converted into Yxy by this equation, and if the color is within the color gamut shown in FIG. As described above, by displaying the color reproduction range according to an output device such as a printer or a monitor at the time of shooting, the photographer can estimate an output result at the time of image output, and the user can perform image generation. It becomes easy to select imaging conditions such as parameter selection and exposure at the time of imaging.
[0111]
The processing flow of the first, second, and third embodiments will be described with reference to the flowchart of FIG.
[0112]
The user starts an imaging operation of the digital camera. In step 1100, the user sets a color space and a device to be output (or a color reproduction range thereof) at the time of recording by using the user interface 112 as shown in FIGS. 2, 4 and 7, for example. Here, the setting is made by the user, but it may be set in advance on the digital camera as an initial setting. In step 1101, imaging conditions such as exposure, photometric value, and distance measurement position, and imaging conditions such as saturation and gradation, and image generation parameters are set. Next, in step 1102, captured image data is generated from an output signal from the image sensor 101, and the captured image data stored in the buffer memory 103 is displayed on the EVF.
[0113]
Then, in step 1103, the out-of-gamut region extraction circuit 107 sets the captured image data output from the image sensor 101 according to the imaging conditions and image generation parameters set in step 1101 by the above-described determination method and the like. An out-of-gamut region corresponding to the color space or the color reproduction range of the output device is determined. If there is an out-of-gamut region in step 1104, the out-of-gamut region is displayed in step 1105 together with the captured image data as shown in FIG. If a large number of out-of-color-gamut regions exist in step 1106 and the user does not pass the OK, the process returns to step 1101 and the user returns to the imaging condition, image generation parameter, color space, output device (or its color reproduction range). The setting is changed, the out-of-gamut region is determined again, and the user can change the setting until he is satisfied. If there is no out-of-gamut region or the out-of-gamut region is small in step 1104 and the user is satisfied in step 1106, the user presses the imaging button in step 1107. The captured image data is recorded on the recording medium 106 together with the color space / image generation parameter / output device (or its color reproduction range).
[0114]
In step 1108, the color reproduction range of the output device and the image generation parameters are set. If the digital camera is connected to an output device such as a printer, the setting is performed instead of recording on a recording medium. The captured image may be directly output to the printer based on the color gamut and parameters.
[0115]
As described above, it is possible to confirm the color space at the time of recording and the out-of-gamut region in the color reproduction range of the output device before outputting or recording according to the set imaging conditions and image generation parameters at the time of imaging. It becomes. In addition, since it is possible to confirm whether or not there is an out-of-color gamut at the time of image capturing and change the setting, it is possible to record an optimal captured image so as to fall within the set color gamut.
[0116]
Further, a flow of determining an out-of-gamut region for a recorded image such as a rec review image and a post-view image after imaging will be described with reference to FIG.
[0117]
In step 2101, the rec review image after the imaging is displayed on the EVF for a predetermined time, or the post-view image read from the recording medium 106 is displayed on the EVF. Next, in step 2102, a color space and an out-of-gamut region with respect to the color reproduction range of the output device are determined according to the imaging conditions or image generation parameters specified at the time of recording. In step 2104, an out-of-gamut region is displayed. In step 2105, the user can confirm the out-of-gamut region. In particular, in the case of a REC review image, if the user does not pass the OK in step 2105, the user can return to the imaging operation and change the imaging conditions and the like to perform re-taking. Can prevent recording of a captured image with poor image quality in which an out-of-gamut region occurs on a recording medium. Also, here, the image generation parameters are changed to the optimal parameters, or a different color space or a different output device is reset, so that the out-of-gamut area is checked again, and the optimal color space and the optimal color space for the recording medium are determined. The parameters can be re-recorded.
[0118]
As described above, the out-of-color-gamut region can be easily confirmed for the image after the image capturing by the setting at the time of the image capturing. Further, the optimum parameters can be newly recorded so as to be within the set color gamut.
[0119]
(Another embodiment of the present invention)
In order to operate various devices to realize the functions of the above-described embodiments, a program code of software for realizing the functions of the above-described embodiments is transmitted to an apparatus or a computer in a system connected to the various devices. The present invention also includes those which are supplied and executed by operating the various devices according to a program stored in a computer (CPU or MPU) of the system or the apparatus.
[0120]
Also, in this case, the program code itself of the software realizes the functions of the above-described embodiment, and the program code itself and a unit for supplying the program code to the computer, for example, storing the program code The recorded recording medium constitutes the present invention. As a recording medium for storing such a program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a magnetic tape, a nonvolatile memory card, a ROM, and the like can be used.
[0121]
When the computer executes the supplied program code, not only the functions of the above-described embodiments are realized, but also the OS (operating system) or other application software running on the computer. It goes without saying that such a program code is also included in the embodiment of the present invention when the functions of the above-described embodiment are realized in cooperation with the above.
[0122]
Further, after the supplied program code is stored in a memory provided in a function expansion board of a computer or a function expansion unit connected to the computer, a CPU provided in the function expansion board or the function expansion unit based on an instruction of the program code. It is needless to say that the present invention also includes a case where the functions of the above-described embodiments are realized by performing part or all of the actual processing.
[0123]
【The invention's effect】
As described above, according to the present invention, there is an effect that a user can easily select an output device having an optimal imaging condition, a color space, an image generation parameter, and an optimal color reproduction range for a captured image.
[0124]
In addition, by displaying the out-of-gamut area together with the EVF image output from the image sensor, it is possible to determine whether or not the color gamut is optimal for recording when capturing an image. By further changing the setting, it is possible to obtain optimal image data that fits in a predetermined color gamut.
[0125]
Further, by determining and displaying the out-of-gamut area according to the imaging conditions and image generation parameters set at the time of imaging, for example, after the imaging, the out-of-gamut area of a captured image recorded on a recording medium or the like is confirmed, There is an effect that an optimal image generation parameter and an output device can be selected.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment and showing a concept when a color space is designated.
FIG. 2 is a diagram showing the first embodiment and showing an example of a color space selection screen displayed on a monitor device.
FIG. 3 shows the first embodiment and is a diagram showing color gamut of NTSC and sRGB.
FIG. 4 is a diagram illustrating an example of an image generation parameter selection screen displayed on a monitor device according to the second embodiment.
FIG. 5 is a block diagram illustrating the first to third embodiments and illustrating an example of a circuit configuration of the imaging apparatus.
FIG. 6 illustrates the first embodiment, and is a diagram illustrating the color gamut of NTSC, sRGB, and AdobeRGB.
FIG. 7 is a diagram showing the third embodiment and showing an example of an output device selection screen displayed on a monitor device.
FIG. 8 is a diagram illustrating the third embodiment and illustrating an example of a difference in a color reproduction range for each output device.
FIG. 9 is a block diagram illustrating an example of a circuit configuration of an imaging device according to a third embodiment.
FIG. 10 is a diagram illustrating an example of color reproduction range characteristics of a printer according to the third embodiment.
FIG. 11 is a diagram illustrating an example of a color gamut characteristic chromaticity diagram of the printer according to the third embodiment.
FIG. 12 is a flowchart 1 showing an example of the first to third embodiments.
FIG. 13 is a flowchart 2 showing an example of the first to third embodiments.
[Explanation of symbols]
101 Image sensor
102 Signal processing circuit
103 buffer memory
104 compression / expansion circuit
105 Recording / reading device
106 recording medium
107 Out-of-gamut area determination circuit
108 Display control circuit
109 D / A converter
110 Monitor display device
111 System Controller
112 User Interface
113 Data memory

Claims (24)

An imaging apparatus for generating image data expressed in a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
For the image data, a determination unit that determines an out-of-gamut region that protrudes from a color gamut of the predetermined color space according to an imaging condition.
An imaging apparatus comprising: an out-of-gamut area display unit that displays the out-of-gamut area. An imaging apparatus for generating image data expressed in a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
A color space selection unit for selecting a color space of the image data,
Determining means for determining, for the image data, an out-of-color-gamut area that protrudes from the color gamut of the color space selected by the color-space selecting means;
An imaging apparatus comprising: an out-of-gamut area display unit that displays the out-of-gamut area together with the captured image. Having a plurality of types of color spaces for selection by the color space selection means,
The apparatus according to claim 2, wherein the color space selection unit is capable of selecting at least one color space from the plurality of types of color spaces. The imaging apparatus according to claim 3, wherein the plurality of types of color spaces include sRGB, esRGB, NTSC, PAL / SECAM, and Adobe RGB. Image parameter selection means for selecting image parameters for generating image data from the captured image,
2. The imaging apparatus according to claim 1, further comprising an out-of-gamut area display unit that displays, in the captured image, an out-of-gamut area outside the predetermined color space. The imaging device according to claim 5, wherein the image parameter of the image data is a saturation parameter for determining saturation. The imaging apparatus according to claim 5, wherein the image parameter of the image data is a gradation parameter for determining a gradation. An image capturing apparatus for generating an image in which a captured image of a subject captured in accordance with an imaging condition designated by a user is expressed in a predetermined color gamut, and an image for selecting an image output device for outputting the captured image Output device selecting means;
Determining means for determining an out-of-color-gamut region protruding from a reproducible color gamut of the image output device;
An imaging apparatus, comprising: an out-of-gamut region display unit that displays the out-of-gamut region determined by the determining unit together with the captured image. 9. The apparatus according to claim 8, wherein the image output device is a monitor or a printer. 3. The out-of-gamut area display unit displays the out-of-gamut area on at least one of an electronic viewfinder image, a rec review image, a post-view image, and a recorded image. The imaging device according to any one of claims 9 to 9. An imaging method for generating image data represented by a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
A determining step of determining, for the image data, an out-of-gamut region that protrudes from a color gamut of the predetermined color space according to an imaging condition;
Having a display step of performing a process of displaying the out-of-gamut region,
An imaging method characterized in that: An imaging method for generating image data represented by a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
A color space selecting step of selecting a color space of the image data;
A determining step of determining, for the image data, an out-of-gamut area that protrudes from a color gamut of the selected color space;
A display step of displaying the out-of-gamut region together with the captured image. An imaging method for generating image data represented by a predetermined color space selected from a plurality of color spaces from a captured image obtained by imaging a subject according to an imaging condition specified by a user,
An image generation parameter selecting step of selecting an image generation parameter for generating image data from the captured image,
An image processing method, comprising: displaying an out-of-color-space area protruding from the predetermined color space with respect to the image data together with the picked-up image. An imaging method for generating an image represented by a predetermined color gamut of a captured image of a subject according to an imaging condition designated by a user,
An output device selecting step of selecting an image output device for outputting the captured image,
A determining step of determining an out-of-color-gamut area protruding from a reproducible color gamut of the image output device;
A display step of displaying the out-of-gamut region determined in the determination step together with the captured image;
An imaging method, comprising: The imaging method according to claim 14, wherein the image output device is a monitor or a printer. 16. The image processing apparatus according to claim 11, wherein the out-of-gamut area is displayed for at least one of an electronic viewfinder image, a rec review image, a post-view image, and a recorded image. The imaging method described in the paragraph. A computer program for causing a computer to execute the imaging method according to any one of claims 11 to 14. A computer-readable recording medium on which the computer program according to claim 17 is recorded. A first display step of displaying a captured image;
In a first display step, an imaging parameter setting step of setting an imaging parameter of a next captured image;
Out-of-gamut determination step of determining whether or not the image is within a predetermined color gamut according to the parameters of the imaging parameter setting step,
An imaging method, comprising: 20. The imaging method according to claim 19, further comprising a second display step of displaying a determination result of the determination step. 20. The imaging method according to claim 19, wherein the imaging parameter includes at least one of an imaging condition, a color space, an image generation parameter, and a color gamut of an output device. A computer program for causing a computer to execute the imaging method according to claim 19. A computer-readable recording medium on which the computer program according to claim 22 is recorded. Imaging means for imaging a subject and outputting a captured image signal;
A / D conversion means for A / D converting the captured image signal and outputting image data;
Storage means for temporarily storing the image data converted by the A / D conversion means;
Compression means for compressing the image data stored in the storage means;
An image data input / output unit that records the image data compressed by the compression unit on a recording medium, or reads from the recording medium,
An imaging device having:
Out-of-gamut determination means for determining whether the image data is within a predetermined color gamut,
An image pickup apparatus, comprising: an out-of-gamut area display unit that displays an out-of-gamut area that protrudes from the predetermined color gamut with respect to the image data.

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