CN112153452B - Dynamic dark part detail presenting method and device and intelligent terminal - Google Patents

Abstract

The embodiment of the invention discloses a method, a device and an intelligent terminal for dynamically presenting details of a dark part, wherein the method comprises the following steps: carrying out dark part histogram statistics on the current content of the picture; judging whether dark part details exist in the current picture according to the statistic value of the dark part histogram; when the dark part details of the picture are judged to be more than the preset threshold value and the dark part details of the current picture are judged, entering a special case protection analysis system, and judging whether the picture noise exceeds a preset noise level and needs to be protected; and when the picture noise does not exceed the preset noise level and does not belong to the condition of special case protection, controlling to enter a dark part detail enhancement system, and gradually enhancing the curve intensity of the dark part to enable the dark part details of the picture to be clearly presented. When the dark part of the picture is more detailed, the invention improves the intensity of the curve presented by the dark part and dynamically presents the details of the dark part. When the content of the dark part of the picture appears without details or with less details, the contrast is highlighted, so that the picture effect with high contrast is presented.

Description

A method, device, and intelligent terminal for dynamically presenting details in dark parts

technical field

The present invention relates to the technical field of image processing, in particular to a method, device, and intelligent terminal for dynamically presenting dark details.

Background technique

The details of the dark part of the monitor refer to whether the details of the picture seen in the darker picture displayed on the monitor are clear.

There are many types of content played on TVs now, and scenes with more details in the dark parts and scenes with dark gray backgrounds are often seen.

Among them, if the scene with more details in the dark part should retain relevant information, and the scene with dark gray picture has no effective content, it is better to be displayed in black to highlight the high contrast of the picture. However, in the prior art, there are obvious conflicts in the methods of preserving dark details and highlighting contrast.

That is to say, when the picture played on the TV of the prior art, especially when the picture with rich details in the dark part appears, the action of suppressing black is used to improve the contrast of the scene, resulting in that the details of the dark part cannot be well presented on the picture; resulting in image processing effect No, the display is not good.

Therefore, the prior art still needs to be improved and developed.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method, device, and intelligent terminal for dynamically presenting dark detail details in view of the above-mentioned defects of the prior art. The processing algorithm often sacrifices the visibility of the dark part of the image, resulting in the problem that the details of the dark part are sacrificed and not visible. The present invention provides an effective method for dynamically presenting the details of the dark part when there are many details in the dark field of the picture. At the same time, when there are few details in the dark part of the picture or the picture has large noise and many contour lines, it will continue to maintain the contrast enhancement and reduce the presentation of dark details; the contrast is improved, the image processing effect is improved, and the display effect is enhanced.

The technical solution adopted by the present invention to solve the problem is as follows:

A method for dynamically rendering dark details, wherein the method includes:

Perform dark histogram statistics on the current content of the screen;

According to the statistical value of the dark part histogram, set the dark part detail judgment condition, and judge whether the dark part details of the current picture are more than a predetermined threshold, so as to determine whether there are dark part details in the current picture;

When it is judged that the details in the dark part of the picture are more than the predetermined threshold, which means that there are dark details in the current picture, enter the special case protection analysis system, and judge whether the picture noise exceeds the preset noise level and need to be protected;

When the picture noise does not exceed the preset noise level and does not belong to the special case protection, the control enters the dark part detail enhancement system to increase the intensity of the dark part curve step by step, so that the details of the dark part of the picture are clearly presented.

In the method for dynamically presenting details of dark parts, the step of performing statistics on the histogram of dark parts of the current content of the picture includes:

Set the Lum_low of the dark histogram statistics as the reference value of the dark part statistics, and perform statistics on the number of histograms for the content whose brightness value is less than or equal to the reference value Lum_Low, where the index value of Hist_Low_index falls from Lum_low in the custom table of statistical brightness intervals Which range of the decision;

And according to the custom table of the statistical brightness interval interval, set the brightness interval range from the initial value Lum1 to the reference value Lum_Low, and output the corresponding low brightness histogram information table Hist_Low_1 to Hist_Low_index for output.

The method for dynamically presenting dark details, wherein the step of judging whether the details in the dark of the current picture are more than a predetermined threshold, so as to determine whether there are details in the dark in the current picture, further includes:

When it is judged that there is no detail in the dark part of the picture content, the intensity of the curve in the dark part will be reduced step by step, and the state of the curve suppressing black will be kept to control the contrast of the picture.

In the method for dynamically presenting the details of the dark part, wherein, when it is judged that the details of the dark part of the picture are more than a predetermined threshold, the steps of the present picture include:

When there are more than n pieces of the dark part histogram data Hist_Low_1 to Hist_Low_index that exceed 1%, generally setting n to 3, it is judged that there are dark part details.

The method for dynamically presenting dark details, wherein, when it is judged that the dark details of the picture are more than the predetermined threshold, which means that there are dark details in the current picture, enter the special case protection analysis system and judge whether the picture noise exceeds the preset noise The steps that the level needs to protect also include:

When it is judged that the details of the dark part of the picture are less than the predetermined threshold, which does not belong to the protection of special circumstances, the intensity of the curve presented in the dark part is gradually reduced, and the state of the curve suppressing black is retained.

The method for dynamically presenting dark details, wherein, when it is judged that the dark details of the picture are more than the predetermined threshold, which means that there are dark details in the current picture, enter the special case protection analysis system and judge whether the picture noise exceeds the preset noise The steps required for the level to be protected include:

When it is determined that the content has hidden details, it will enter the special case protection analysis system to determine whether the content meets the special content requirements;

The special case protection analysis system presets the noise level according to the noise of the content and whether there is a compressed high-line intensity in the film source;

When it is greater than the preset noise level, it is judged to enter a special case of protection, and the output of this screen is a special case; when it is lower than the preset noise level, it is judged that this screen is not a special case.

The method for processing the details of the dynamic presentation dark part, wherein, when the noise level is greater than the preset noise level, it is judged to enter the special case of protection, and the picture is output as a special case; when the noise level is lower than the preset noise level, it is judged that the picture is not a special case After the steps include:

When the picture is a special case, reduce the intensity of the curve in the dark part step by step, and keep the state of the curve to suppress the black, so as to control the contrast of the picture;

When the picture is not a special case, the control enters the dark part detail enhancement system to increase the intensity of the dark part curve step by step, so that the details of the dark part of the picture are clearly presented.

A device for dynamically rendering dark details, wherein the device includes:

The dark histogram processing module is used to perform dark histogram statistics on the current content of the screen;

The dark part detail determination module is used to set the dark part detail determination condition according to the statistical value of the dark part histogram, and judge whether the dark part details of the current picture are more than a predetermined threshold value, so as to determine whether there are dark part details in the current picture;

The noise level judging module is used to enter into the special case protection analysis system when it is judged that the details of the dark part of the picture are more than the predetermined threshold value, and there are dark details in the current picture, and judge whether the picture noise exceeds the preset noise level and needs to be protected;

The dark part curve intensity enhancement module is used to control and enter the dark part detail enhancement system when the picture noise does not exceed the preset noise level and does not belong to special protection, and the dark part curve intensity is gradually increased to make the details of the dark part of the picture clear.

An intelligent terminal, including a memory, and one or more programs, wherein one or more programs are stored in the memory, and configured to be executed by one or more processors. The one or more programs include For performing any one of the described methods.

A storage medium, wherein the storage medium stores a processing program for dynamically presenting dark part details, and when the processing program for dynamically presenting dark part details is executed by a processor, the dynamic presentation of dark part details according to any one of claims 1-7 is realized. The steps of the processing method.

Beneficial effects of the present invention: the embodiment of the present invention discloses a processing method, device, and intelligent terminal for dynamically presenting dark part details. The present invention provides a method for dynamically presenting dark part details. Through further analysis of the dark part details in the scene, Perform dynamic judgment and processing to achieve a better presentation of the dark part of the picture, and at the same time highlight the contrast of the picture.

In the present invention, when there are many details in the dark part of the picture, the intensity of the curve presented in the dark part is increased, and the details of the dark part are dynamically presented. When there are no details or few details in the dark part of the picture, highlight the contrast, reduce the intensity of the curve in the dark part, keep the state of suppressing black, and make it present a high-contrast picture effect. Through the analysis and judgment of the content of the dark area, the content of the picture can be presented when there are many details in the dark area, and the contrast can be improved when there are few details in the dark area.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic flowchart of a method for dynamically presenting details in a dark part provided by an embodiment of the present invention.

Fig. 2 is a schematic diagram of an interaction process in a power-on state of a specific application embodiment of the method for dynamically presenting dark part details of the present invention.

Fig. 3 is a schematic diagram of curve processing for enhancing the rendering of dark part details by the dark part detail enhancement system of the method for dynamically presenting dark part detail processing provided by an embodiment of the present invention.

FIG. 4 is a schematic diagram of curve processing for reducing the presentation of dark detail by the dark detail enhancement system of the method for dynamically presenting dark detail processing provided by an embodiment of the present invention.

Fig. 5 is a functional block diagram of an apparatus for dynamically presenting dark part details provided by an embodiment of the present invention.

Fig. 6 is a functional block diagram of an internal structure of a smart terminal provided by an embodiment of the present invention.

FIG. 7 is a schematic diagram of dark part histogram data Hist_Low_1 to Hist_Low_index in the method for dynamically rendering dark part details provided by an embodiment of the present invention.

FIG. 8 is a schematic diagram of a dark part curve of a method for dynamically presenting dark part details provided by an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

When the picture played on the TV in the prior art, especially the picture with rich dark part details appears, the action of suppressing black is used to improve the contrast of the scene, resulting in the problem that the dark part details cannot be well presented on the picture.

In order to solve the problems in the prior art, the present invention provides a processing method for dynamically presenting details of dark parts. The present invention dynamically presents the details of dark parts by increasing the strength of curves presented in dark parts when there are many details in dark parts in the picture. When there are no details or few details in the dark part of the picture, highlight the contrast, reduce the intensity of the curve in the dark part, keep the state of suppressing black, and make it present a high-contrast picture effect.

exemplary method

As shown in FIG. 1, an embodiment of the present invention provides a method for dynamically presenting details of dark parts. In the embodiment of the present invention, the method includes the following steps:

Step S100, performing statistics on the histogram of the dark part of the current content of the screen;

In the embodiment of the present invention, for example, the Lum_low of the histogram statistics of the dark part is set as the reference value of the dark part statistics, and the histogram quantity statistics are performed on the content whose luminance value is less than or equal to Lum_Low;

And according to the statistical brightness interval custom table, set the brightness interval range from the initial value Lum1 to the reference value Lum_Low, and output the low brightness histogram information table Hist_Low_1 to Hist_Low_index for output.

In the embodiment of the present invention, the algorithm steps for histogram statistics are as follows:

1) Count the number of pixels that appear in the grayscale corresponding to each interval Hist_Low_i in the image, denoted as Lum[i];

2) Hist[i]=Lum[i]/(W*H), where W and H are the width and height of the image.

For example: set Lum_low to 64 and Lum_1 to 0. The relationship between the statistical brightness interval custom table is set as follows. Then because Lum_low is 64, the index value is 8:

Step S200 , according to the statistical value of the dark histogram, set the dark detail determination condition, and determine whether the dark detail of the current picture is more than a predetermined threshold, so as to determine whether there is dark detail in the current picture.

In the embodiment of the present invention, according to the statistical value of the dark part histogram, the dark part detail judgment condition is set, and it is judged whether the dark part details of the current picture are more than a predetermined threshold, so as to judge whether the current picture has more dark part details.

In the embodiment of the present invention, according to the statistical value of the dark part histogram, the conditions for determining the details of the dark part are set, and it is judged whether the details of the dark part of the current picture are more than a predetermined threshold, so as to judge whether the current picture has more details in the dark part. If it is lower than the predetermined threshold, it is determined that the current picture has more details in the dark part; when it is judged that the details of the dark part of the current picture are less than the predetermined threshold, it is determined that the current picture does not have many details in the dark part.

In the present invention, when there are more than n pieces of the dark histogram data Hist_Low_1 to Hist_Low_index that exceed 1%, generally n is set to 3, and it is judged that there are dark details.

For example, if there are more than 3 dark part histogram data Hist_Low_1 to Hist_Low_index with a ratio of more than 1%, it is judged that there are dark part details, as shown in FIG. 7 .

When it is judged that there is no detail in the dark part of the picture content, the intensity of the curve in the dark part will be reduced step by step, and the state of the curve suppressing black will be kept to control the contrast of the picture.

Step S300, when it is judged that the details of the dark part of the picture are more than the predetermined threshold, which means there are details of dark parts in the current picture, enter the special case protection analysis system, and determine whether the picture noise exceeds the preset noise level and needs to be protected;

In the embodiment of the present invention, when it is determined that the details of the dark part of the picture are more than the predetermined threshold, and it is determined that there are details of the dark part in the current picture, it enters into the special case protection analysis system and judges whether the picture has large noise points or large contour lines caused by compression, etc. In special cases, the corresponding analysis results are output;

When it is judged that there are many details in the dark part of the picture, it enters the special case protection analysis system to judge whether the picture has large noise or large contour lines caused by compression, and outputs the corresponding analysis results.

In another embodiment, when it is judged that the details of the dark part of the picture are less than the predetermined threshold, which does not belong to the protection of special circumstances, then the intensity of the curve presented in the dark part is gradually reduced, and the state of the curve suppressed black is kept.

As shown in Figure 8, the formula for rendering the curve is as follows:

F(x)=ax-b; (x>=mid)

F(x)=(a*mid-b)/mid*x; (x<mid)

In the embodiment of the present invention, as shown in Figure 8, the intensity of the dark curve is reduced step by step: according to the size of Lum_low, the mid value is set. In general, mid=Lum_low/2, when the intensity of the dark curve needs to be increased step by step , set a>1, and gradually increase the value of a.

Step S400, when the picture noise does not exceed the preset noise level and does not belong to the special case protection, control enters the dark part detail enhancement system to increase the intensity of the dark part curve step by step, so that the details of the dark part of the picture are clearly presented.

In the embodiment of the present invention, when the picture does not belong to the case of special protection, it enters the dark part detail enhancement system to enhance the dark part curve, so that the dark part details can be clearly presented.

Specifically:

When it is determined that the content has hidden details, it will enter the special case protection analysis system to determine whether the content meets the special content requirements;

The special case protection analysis system presets the noise level according to the noise of the content and whether there is a compressed high-line intensity in the film source;

When it is greater than the preset noise level, it is judged to enter a special case of protection, and the output of this screen is a special case; when it is lower than the preset noise level, it is judged that this screen is not a special case.

When the picture is a special case, reduce the intensity of the curve in the dark part step by step, and keep the state of the curve to suppress the black, so as to control the contrast of the picture;

When the picture is not a special case, the control enters the dark part detail enhancement system to increase the intensity of the dark part curve step by step, so that the details of the dark part of the picture are clearly presented.

In the embodiment of the present invention,

As shown in Figure 8, the formula for rendering the curve is as follows:

F(x)=ax-b; (x>=mid)

F(x)=(a*mid-b)/mid*x; (x<mid)

In the formula: mid defines the grayscale position that needs to improve the details of the dark part. When a<1, it means to improve the visibility of the dark part. When a>1, the visibility of dark parts is reduced, and the contrast performance is improved. The b value is the curve offset value, which adjusts the initial state of the curve. x is the input pixel luminance value, and F(x) is the pixel output luminance value after the dark part presents the curve.

As shown in Figure 8, the intensity of the dark curve is increased step by step: specifically, the mid value is set according to the size of Lum_low. In general, mid=Lum_low/2. When the intensity of the dark curve needs to be increased step by step, set 0 <a<1, and gradually reduce the value of a. (For example, when improving the visibility of the dark part, a is adjusted from 1 to 0.6, and the dark part of the picture is more clear at this time)

As for the intensity of the dark curve gradually decreasing, then: according to the size of Lum_low, set the mid value, generally mid=Lum_low/2, when it is necessary to increase the intensity of the dark curve step by step, set a>1, and Gradually increase the value of a.

From Figure 8, it can be seen that the top line a is the smallest and the bottom line a is the largest

It can be seen from the above that the present invention can well solve the problem that the original image processing algorithm often sacrifices the visibility of the dark part of the image when there are a large number of dark part details in the picture, so that the details of the dark part are sacrificed and cannot be seen. Judgment, to achieve the content of the picture when there are many details in the dark part, and improve the contrast when there are few details in the dark part.

The present invention is described in further detail below by specific application examples:

As shown in FIG. 2 , a method for dynamically presenting dark part details described in a specific application embodiment of the present invention includes the following steps:

S1: start

S2: The image enters the histogram statistics system of the dark part of the picture, and the predetermined threshold value Lum_low is set as the reference value of the dark part statistics, and the histogram quantity is counted for the content whose brightness value is less than or equal to Lum_Low. Then set the luminance interval range from Lum1 to Lum_Low, and output the low luminance histogram information table Hist_Low_1 to Hist_Low_index for output.

In this embodiment, the predetermined threshold Lum_low indicates that the data below the luminance is the dark part detail data. Generally, the value of the predetermined threshold Lum_low is defined as 64 (this is a digital signal).

In this embodiment, Lum1 is 0, which is the lowest value of dark statistics. It is generally 0, and can also be adjusted to other values such as 16. The interval between Lum1 to Lum_Low is generally 8.

That is, in the embodiment of the present invention, the image enters the histogram statistics system of the dark part of the screen, and the predetermined threshold value Lum_low is set to 60 as the reference value for dark part statistics, and the histogram quantity statistics are performed on the content whose brightness value is less than or equal to Lum_Low. Then set the luminance interval range from Lum1(0) to Lum_Low(64) to 8, and output the low luminance histogram information table Hist_Low_1 to Hist_Low_index for output.

The main advantage of this step S2 is that: according to the above, set the predetermined threshold to 64, set Lum_1 to 0, set Hist_Low to 8, and set the brightness interval to 8, then the 0 in the statistical screen information will be -8, 9-16, 17-25.....56-64 the histogram information of the data content.

S3: Enter the dark part detail analysis system, and the system sets the conditional parameters and algorithms for detail judgment; according to the dark part histogram statistical information, judge whether there are dark part details, enter S4 if it is not, and enter S5 if it is;

In this step, enter the dark part detail analysis system, and output the result that there are dark part details or no dark part details according to the condition parameters and algorithm for detail judgment set by the system. For example, between Hist_Low_index and Hist_low_1 of the dark histogram data (that is, more than 3 in the histogram between 0-8, 9-16, 17-25...56-64 in the above statistical screen information) , it is judged that there are dark details.

That is, in the present invention, the conditional parameters and algorithm for setting detail determination are specifically: according to the above example, if the histogram ratios from Hist_Low_1 to Hist_Low_index are greater than 1%, and there are 3 or more, it is judged that there are a large number of dark details in the picture.

S4: In the dark part detail analysis system, it is determined that there is no dark part detail in the content, and the intensity of the dark part curve is reduced, and the state of the curve suppressing black is kept, so that the picture has more contrast.

That is, in the specific embodiment of the present invention, if the judgment is less than 3, it is judged that there is no obvious dark part detail.

However, in the embodiment of the present invention, how to "reduce the intensity of the curve presented in the dark part, and keep the state of the curve suppressed black" is: adjust the curve direction of the bottom area of the curve. In this case, the shape of the curve is not pressed.

S5: Enter the special case protection analysis system to judge whether it belongs to a special case and needs to be protected. If yes, it belongs to enter S6; when no, it does not belong to enter S7;

That is, in the embodiment of the present invention, when it is determined in the dark part detail analysis system that the content has dark part details, it enters into the special case protection analysis system to judge whether the content meets special content conditions. For example, the special case protection analysis system judges according to the noise of the content and whether there is a Tnoise_level of compressed contour intensity in the film source. When it is greater than Tnoise_level, it is judged to enter a special case of protection, and the output of this picture is a special case. When it is less than Tnoise_level, it is judged that this picture is not a special case.

In the present invention, the conditional parameters and algorithms for setting detail judgments are specifically: according to the pixel (pixel) quantity in the above example, its proportion to the overall pixel quantity of the whole picture, if it is greater than 1%, and there are 3 or more than 3 It is judged that there are a lot of dark details in the picture.

When it is determined in the dark part detail analysis system that the content has dark part details, it will enter the special case protection analysis system to judge whether the content meets the special content situation. In this embodiment, the special content is mainly noise judgment, including random noise (random noise) and compression noise (noise).

In the embodiment of the present invention, Tnoise_level is a threshold value of noise level, and when it is greater than this value, it is considered that the noise is too large.

In the embodiment of the present invention, when it is greater than Tnoise_level, it is judged as a special case of entering protection, and the output of this picture is a special case; the advantage is that the judgment of noise can be increased, and the details of the dark part will not be presented in the scene where the noise of the dark part needs to be suppressed , resulting in a dirty screen.

In the embodiment of the present invention, when it is less than Tnoise_level, it is judged that the picture is not a special case. The advantage is: in non-special cases, the normal details of the dark part will be presented, and at this time, the details of the dark part of the picture will be presented as much as possible.

S6: When the picture is a special case, reduce the intensity of the curve in the dark part, keep the state of the curve suppressing black, and make the picture more contrasty.

In this step: about reducing the intensity of the curves presented in the dark part, and retaining the state of suppressing the curves, the specific method is: change the trend of the curves, as shown in Figure 3, which is a schematic diagram of the curve processing for enhancing the details of the dark parts in the dark part detail enhancement system.

S7: The picture is not a special case. Enter the dark part detail enhancement system to increase the intensity of the curve in the dark part, so that the details of the dark part of the picture can be displayed more clearly.

As shown in FIG. 4 , it is a schematic diagram of curve processing for reducing the rendering of dark detail by the dark detail enhancement system of the method for dynamically presenting dark detail processing provided by an embodiment of the present invention.

It can be seen from the above that the present invention can well solve the problem that the original image processing algorithm often sacrifices the visibility of the dark part of the image when there are a large number of dark part details in the picture, so that the details of the dark part are sacrificed and cannot be seen. Judgment, to achieve the content of the picture when there are many details in the dark part, and improve the contrast when there are few details in the dark part.

The key point of the technology of the present invention is that there is an irreconcilable situation between the presentation of the details of the dark part and the contrast effect of the TV before. The technical key point of the present invention is that through the statistics and analysis of dark part content information, combined with the judgment of the special case protection system, the details of the picture can be presented more reasonably, while taking into account the contrast of the picture.

exemplary device

As shown in FIG. 5 , an embodiment of the present invention provides a device for dynamically presenting details in dark parts, which includes:

A dark histogram processing module 510, configured to perform dark histogram statistics on the current content of the picture;

The dark part detail determination module 520 is used to set the dark part detail determination condition according to the statistical value of the dark part histogram, and judge whether the dark part details of the current picture are more than a predetermined threshold, so as to determine whether there are dark part details in the current picture;

The noise level judging module 530 is used to enter the special case protection analysis system when it is judged that the details of the dark part of the picture are more than a predetermined threshold, and that there are details of the dark part in the current picture, and judge whether the picture noise exceeds the preset noise level and needs to be protected;

The dark part curve intensity enhancement module 540 is used to control and enter the dark part detail enhancement system when the picture noise does not exceed the preset noise level and does not belong to the special case protection, and the dark part curve intensity is gradually increased to make the details of the dark part of the picture clearly presented, specifically as above mentioned.

Based on the above embodiments, the present invention also provides an intelligent terminal, the functional block diagram of which may be shown in FIG. 6 . The intelligent terminal includes a processor, a memory, a network interface, a display screen and a camera connected through a system bus. Wherein, the processor of the smart terminal is used to provide calculation and control capabilities. The memory of the smart terminal includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface of the smart terminal is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, a processing method for dynamically presenting dark part details is realized. The display screen of the smart terminal may be a liquid crystal display screen or an electronic ink display screen, and the camera of the smart terminal is pre-installed on the smart terminal for shooting.

Those skilled in the art can understand that the functional block diagram shown in FIG. 6 is only a block diagram of a part of the structure related to the solution of the present invention, and does not constitute a limitation on the smart terminal to which the solution of the present invention is applied. The specific smart terminal More or fewer components than shown in the figures may be included, or certain components may be combined, or have a different arrangement of components.

In one embodiment, an intelligent terminal is provided, including a memory, and one or more programs, wherein one or more programs are stored in the memory, and are configured to be executed by one or more processors. One or more programs contain instructions for:

Perform dark histogram statistics on the current content of the screen;

According to the statistical value of the dark part histogram, set the dark part detail judgment condition, and judge whether the dark part details of the current picture are more than a predetermined threshold, so as to determine whether there are dark part details in the current picture;

When it is judged that the details in the dark part of the picture are more than the predetermined threshold, which means that there are dark details in the current picture, enter the special case protection analysis system, and judge whether the picture noise exceeds the preset noise level and need to be protected;

When the picture noise does not exceed the preset noise level and does not belong to the special case protection, the control enters the dark part detail enhancement system to increase the intensity of the dark part curve step by step, so that the details of the dark part of the picture are clearly presented, as described above.

Wherein, the step of detecting the brightness of the current environment through the brightness sensor and obtaining the brightness value of the current environment includes:

Wherein, the step of performing dark histogram statistics on the current content of the picture comprises:

Set the Lum_low of the histogram statistics of the dark part as the reference value of the dark part statistics, and perform statistics on the number of histograms for the content whose brightness value is less than or equal to the reference value Lum_Low;

And set the luminance interval range from the initial value Lum1 to the reference value Lum_Low, and output the low luminance histogram information table Hist_Low_1 to Hist_Low_index for output.

Wherein, the step of judging whether the details of the dark part of the current picture are more than a predetermined threshold to determine whether there are details of the dark part of the current picture further includes:

When it is judged that there is no detail in the dark part of the picture content, the intensity of the curve in the dark part will be reduced step by step, and the state of the curve suppressing black will be kept to control the contrast of the picture.

Wherein, when it is judged that the details of the dark part of the picture are more than the predetermined threshold, the steps for the presence of details of the dark part of the current picture include:

When there are more than 3 histogram data of the dark part between Hist_Low_index and Hist_Low_1 which exceed 1%, it is judged that there are details in the dark part.

Wherein, when it is judged that the details of the dark part of the picture are more than the predetermined threshold, which means that the details of the dark part exist in the current picture, the step of entering the special case protection analysis system and judging whether the picture noise exceeds the preset noise level and needs to be protected further includes:

When it is judged that the details of the dark part of the picture are less than the predetermined threshold, which does not belong to the protection of special circumstances, the intensity of the curve presented in the dark part is gradually reduced, and the state of the curve suppressing black is retained.

Wherein, when it is judged that the details of the dark part of the picture are more than the predetermined threshold, which means that there are details of the dark part of the current picture, entering the special case protection analysis system, and judging whether the picture noise exceeds the preset noise level and needs to be protected includes:

When it is determined that the content has hidden details, it will enter the special case protection analysis system to determine whether the content meets the special content requirements;

The special case protection analysis system presets the noise level according to the noise of the content and whether there is a compressed high-line intensity in the film source;

When it is greater than the preset noise level, it is judged to enter a special case of protection, and the output of this screen is a special case; when it is lower than the preset noise level, it is judged that this screen is not a special case.

Wherein, when it is greater than the preset noise level, it is judged to enter a special case of protection, and the output of this picture is a special case; when it is less than the preset noise level, the step of judging that this picture is a non-special case includes:

When the picture is a special case, reduce the intensity of the curve in the dark part step by step, and keep the state of the curve to suppress the black, so as to control the contrast of the picture;

When the picture is not a special case, the control enters the dark part detail enhancement system to increase the intensity of the dark part curve step by step, so that the details of the dark part of the picture are clearly presented, as described above.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the computer programs can be stored in a non-volatile computer-readable memory In the medium, when the computer program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, any reference to memory, storage, database or other media used in the various embodiments provided by the present invention may include non-volatile and/or volatile memory. Nonvolatile memory can include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Chain Synchlink DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

To sum up, the embodiment of the present invention discloses a method, device, and intelligent terminal for dynamically presenting details of dark parts. The present invention provides a method for dynamically presenting details of dark parts. Dynamic judgment and processing can achieve better rendering of the dark part of the picture, and at the same time can highlight the contrast of the picture. In the present invention, when there are many details in the dark part of the picture, the intensity of the curve presented in the dark part is increased, and the details of the dark part are dynamically presented. When there are no details or few details in the dark part of the picture, highlight the contrast, reduce the intensity of the curve in the dark part, keep the state of suppressing black, and make it present a high-contrast picture effect. Through the analysis and judgment of the content of the dark area, the content of the picture can be presented when there are many details in the dark area, and the contrast can be improved when there are few details in the dark area.

It should be understood that the application of the present invention is not limited to the above examples, and those skilled in the art can make improvements or transformations according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.

Claims (7)

1. A method for processing details of a dynamically rendered dark portion, the method comprising:

carrying out dark part histogram statistics on the current content of the picture;

setting a dark part detail judgment condition according to the statistic value of the dark part histogram, and judging whether the dark part detail of the current picture is more than a preset threshold value so as to determine whether the dark part detail exists in the current picture;

when the detail of the dark part of the picture is judged to be more than the preset threshold value and the detail of the dark part of the current picture is judged, entering a special case protection analysis system and judging whether the noise of the picture exceeds the preset noise level and needs to be protected or not;

when the picture noise does not exceed the preset noise level and does not belong to the condition of special case protection, controlling to enter a dark part detail enhancement system, and gradually enhancing the curve intensity of the dark part to enable the dark part details of the picture to be clearly presented;

when the detail of the dark part of the picture is judged to be less than the preset threshold value and does not belong to the protection of special conditions, the intensity of the curve presented by the dark part is gradually reduced, and the state that the curve is pressed to be black is kept;

the step of performing dark part histogram statistics on the current content of the picture comprises the following steps:

setting the Lum _ Low of the dark part histogram statistics as the reference value of the dark part statistics, and carrying out histogram quantity statistics on the contents of which the brightness values are less than or equal to the reference value Lum _ Low;

and setting a brightness interval range from the initial value Lum1 to the reference value Lum _ Low according to the self-defined table of the statistical brightness interval, and outputting the corresponding histogram information table of Low brightness Hist _ Low _1 to Hist _ Low _ index for output.

2. The method according to claim 1, wherein when it is determined that the dark detail of the picture is more than the predetermined threshold, the step of determining that the dark detail of the current picture exists comprises:

when more than n pieces of the dark portion histogram data Hist _ Low _1 to Hist _ Low _ index exceed 1% in proportion exist, and n is set to be 3 generally, it is judged that the dark portion details exist.

3. The method according to claim 1, wherein the step of entering a special case protection analysis system and determining whether the picture noise exceeds a preset noise level and needs protection when it is determined that the picture dark detail is greater than the predetermined threshold and is the current picture dark detail, comprises:

when the content is judged to have the details of the dark part, entering a special case protection analysis system, and judging whether the content meets the condition of special content;

a special case protection analysis system judges whether a preset noise level with high line strength of compression exists or not according to the noise point condition of the content and the film source;

when the noise level is higher than the preset noise level, judging that a special case for protection is entered, and outputting the picture as a special case condition; and when the noise level is lower than the preset noise level, judging that the picture is in a non-special condition.

4. The method according to claim 3, wherein when the noise level is higher than a predetermined noise level, the method determines that the protection special case is entered, and outputs the frame as a special case; when the noise level is less than the preset noise level, the step of judging the picture as the non-specific condition comprises the following steps:

when the picture belongs to the special case, the intensity of the curve presented by the dark part is reduced step by step, and the state that the curve is pressed to be black is kept, so that the picture is controlled to have contrast;

and when the picture belongs to the non-specific condition, controlling to enter a dark part detail enhancement system, and gradually enhancing the dark part curve intensity to clearly present the dark part details of the picture.

5. An apparatus for dynamically rendering dark detail, the apparatus comprising:

the dark part histogram processing module is used for carrying out dark part histogram statistics on the current content of the picture;

the dark part detail judging module is used for setting a dark part detail judging condition according to the statistic value of the dark part histogram and judging whether the dark part detail of the current picture is more than a preset threshold value so as to determine whether the dark part detail exists in the current picture;

the noise level judging module is used for entering a special case protection analysis system when the fact that the details of the dark part of the picture are more than the preset threshold value is judged, and whether the noise of the picture exceeds the preset noise level and needs to be protected is judged;

the dark part curve intensity improving module is used for controlling to enter a dark part detail enhancing system when the picture noise does not exceed the preset noise level and does not belong to the condition of special case protection, and gradually improving the dark part curve intensity to enable the picture dark part details to be clearly presented;

the dark part curve blackening module is used for reducing the intensity of a curve presented by a dark part step by step and keeping the curve blackening state when the dark part detail of the picture is judged to be smaller than a preset threshold value and does not belong to the protection of special conditions;

the dark part histogram processing module is configured to:

setting the Lum _ Low counted by the histogram of the dark part as a reference value counted by the dark part, and counting the number of the histograms of the contents of which the brightness values are less than or equal to the reference value Lum _ Low;

and setting a brightness interval range from the initial value Lum1 to the reference value Lum _ Low according to the self-defined table of the statistical brightness interval, and outputting the corresponding histogram information table of Low brightness Hist _ Low _1 to Hist _ Low _ index for output.

6. An intelligent terminal, comprising a memory, and one or more programs, wherein the one or more programs are stored in the memory, and wherein the one or more programs being configured to be executed by the one or more processors comprises instructions for performing the method of any of claims 1-4.

7. A storage medium storing a dynamic rendering dark detail processing program which, when executed by a processor, implements the steps of the dynamic rendering dark detail processing method according to any one of claims 1 to 4.

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