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JPH11146216A5 - - Google Patents

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Publication number
JPH11146216A5
JPH11146216A5 JP1997307384A JP30738497A JPH11146216A5 JP H11146216 A5 JPH11146216 A5 JP H11146216A5 JP 1997307384 A JP1997307384 A JP 1997307384A JP 30738497 A JP30738497 A JP 30738497A JP H11146216 A5 JPH11146216 A5 JP H11146216A5
Authority
JP
Japan
Prior art keywords
color
density
exposure
medium
subject
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1997307384A
Other languages
Japanese (ja)
Other versions
JPH11146216A (en
JP3936041B2 (en
Filing date
Publication date
Application filed filed Critical
Priority to JP30738497A priority Critical patent/JP3936041B2/en
Priority claimed from JP30738497A external-priority patent/JP3936041B2/en
Publication of JPH11146216A publication Critical patent/JPH11146216A/en
Publication of JPH11146216A5 publication Critical patent/JPH11146216A5/ja
Application granted granted Critical
Publication of JP3936041B2 publication Critical patent/JP3936041B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【0003】
色管理は、幾つかの構成要素、例えばセットアップ、色補正(色変換)、QF補正(測色品質係数)、絵作りおよび出力系変換などの構成要素に分解できる。
ここで、セットアップとは、濃度バランスおよびホワイトバランスを取る手続きで、具体的にはlogEシフトをイメージすれば良く、その内容は、自動露光量補正(AE)や自動ホワイトバランス補正(AWB)である。
次に、色補正(色変換)とは、図9に示すように、撮像メディア(媒体)、例えばカラーネガティブフィルムの分光感度や撮像デバイス、例えば、CCDの分光感度に対応する原色[B],[G],[R]を参照して、有効露光量B,G,Rに色度を対応させる手続きである。すなわち、色補正の内容は、原色参照である。
[0003]
Color management can be broken down into several components, such as setup , color correction (color conversion), QF correction (colorimetric quality factor), picture creation, and output system conversion.
Here, the term "setup" refers to a procedure for achieving density balance and white balance, which can be thought of as a logE shift, and includes automatic exposure correction (AE) and automatic white balance correction (AWB).
Next, color correction (color conversion) is a procedure for matching chromaticity to effective exposure amounts B, G, and R by referring to the primary colors [B], [G], and [R] that correspond to the spectral sensitivity of an imaging medium (medium), such as color negative film, or an imaging device, such as a CCD, as shown in Fig. 9. In other words, the content of color correction refers to the primary colors.

【0020】
図1に示すイメージングシステム10は、被写体12または被写体12を撮影したカラーネガティブフィルムやカラーポジティブフィルムなどの撮影媒体(メディア)13の担持画像、すなわち原画像14と、この原画像14を収録する撮像デバイス16と、撮像デバイス16で収録して得た画像データ(RGB)に被写体12を直接撮影する撮像デバイス16または撮影媒体13のRGB3原色の分光感度をタグ(付帯情報)として付与し、入力撮像系の媒体またはデバイスの分光感度がタグとして付与されたRGB画像データを出力デバイス20に供給する情報供給手段18と、供給された画像データを露光濃度への変換や硬調化処理などを行う画像処理手段22と、供給された分光感度に基づいて出力デバイス20で用いられる原色に関する規格化積分濃度プロファイルを作成するプロファイル作成手段24と、画像処理手段22によって画像処理された供給画像データをプロファイル作成手段24によって作成された規格化積分濃度プロファイルに従って出力デバイス20(例えば、デジタルフォトプリンタ30やモニタ32)に固有の信号(デバイスデペンデントデータ;DDD)に変換する変換手段26と、出力デバイス20として、この固有の信号に基づいて、被写体12が再現されたカラーペーパー(CP、反射媒体)34を出力するデジタルフォトプリンタ30または固有の信号に基づいて被写体12が再現された表示画面(CRT)36を持つモニタ32とを有する。
[0020]
The imaging system 10 shown in FIG. 1 includes an image carried on a subject 12 or a photographing medium (media) 13 such as a color negative film or color positive film on which the subject 12 has been photographed, i.e., an original image 14, an imaging device 16 that records this original image 14, information supply means 18 that adds, as tags (accompanying information), the spectral sensitivities of the three RGB primary colors of the imaging device 16 that directly photographs the subject 12 or the photographing medium 13 to the image data (RGB) recorded by the imaging device 16, and supplies the RGB image data tagged with the spectral sensitivities of the medium or device of the input imaging system to an output device 20, image processing means 22 that converts the supplied image data to exposure density and performs contrast hardening processing, and an image processing unit 23 that processes the supplied spectral sensitivities. The image processing device includes a profile creating means 24 that creates a normalized integral density profile for the primary colors used in the output device 20 based on the normalized integral density profile; a conversion means 26 that converts the supplied image data that has been image-processed by the image processing means 22 into a signal (device-dependent data; DDD) specific to the output device 20 (e.g., a digital photoprinter 30 or a monitor 32) in accordance with the normalized integral density profile created by the profile creating means 24; and as the output device 20, a digital photoprinter 30 that outputs color paper (CP, reflective medium) 34 on which the subject 12 is reproduced based on this specific signal, or a monitor 32 that has a display screen (CRT) 36 on which the subject 12 is reproduced based on the specific signal.

【0069】
この露光濃度(B1 ,G1 ,R1 )に下記式(20)に示すような硬調化処理を施し、硬調化露光濃度(B2 ,G2 ,R2 )を得た。
2 =1.5・B1
2 =1.5・G1 …(20)
2 =1.5・R1
[0069]
This exposure density (B 1 , G 1 , R 1 ) was subjected to a contrast hardening process as shown in the following formula (20) to obtain a contrast hardened exposure density (B 2 , G 2 , R 2 ).
B2 = 1.5 B1
G 2 =1.5・G 1 …(20)
R2 = 1.5 R1

【0072】
この後、図8に示す手順に従って、反射プリントを作成した。まず、PCモニタ Multiscan17seII(ソニー社製)上に表示されている画像データ(B0 ,G0 ,R0 )に対して下記式(21)に示すような対数変換を施し、対数スケールの露光濃度(B1 ,G1 ,R1 )を得た。
1 =−log(B0 /255)2.2
1 =−log(G0 /255)2.2 …(21)
1 =−log(R0 /255)2.2
この露光濃度(B1 ,G1 ,R1 )に下記式(22)に示すような硬調化処理を施し、硬調化露光濃度(B2 ,G2 ,R2 )を得た。
2 =1.5・B1
2 =1.5・G1 …(22)
2 =1.5・R1
[0072]
Thereafter, a reflection print was produced according to the procedure shown in Fig. 8. First, the image data ( B0 , G0 , R0 ) displayed on a PC monitor Multiscan17seII (manufactured by Sony Corporation) was subjected to logarithmic transformation as shown in the following equation (21) to obtain the exposure density ( B1 , G1 , R1 ) on a logarithmic scale.
B 1 =-log(B 0 /255) 2.2
G 1 =-log(G 0 /255) 2.2 …(21)
R 1 =-log(R 0 /255) 2.2
This exposure density (B 1 , G 1 , R 1 ) was subjected to a contrast hardening process as shown in the following formula (22) to obtain a contrast hardened exposure density (B 2 , G 2 , R 2 ).
B2 = 1.5 B1
G 2 =1.5・G 1 …(22)
R2 = 1.5 R1

JP30738497A 1997-11-10 1997-11-10 Color management method and apparatus Expired - Lifetime JP3936041B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30738497A JP3936041B2 (en) 1997-11-10 1997-11-10 Color management method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30738497A JP3936041B2 (en) 1997-11-10 1997-11-10 Color management method and apparatus

Publications (3)

Publication Number Publication Date
JPH11146216A JPH11146216A (en) 1999-05-28
JPH11146216A5 true JPH11146216A5 (en) 2004-10-14
JP3936041B2 JP3936041B2 (en) 2007-06-27

Family

ID=17968412

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30738497A Expired - Lifetime JP3936041B2 (en) 1997-11-10 1997-11-10 Color management method and apparatus

Country Status (1)

Country Link
JP (1) JP3936041B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007017862A (en) * 2005-07-11 2007-01-25 Mitsubishi Electric Corp Image display device

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