WO2015192545A1

WO2015192545A1 - Photographing method and apparatus and computer storage medium

Info

Publication number: WO2015192545A1
Application number: PCT/CN2014/088191
Authority: WO
Inventors: 李黎国; 李振华; 张文娜
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-06-20
Filing date: 2014-10-09
Publication date: 2015-12-23
Also published as: CN105208294A

Abstract

A photographing method and apparatus and a computer storage medium. The method comprises: when a flash light enters a main-flash stage, separately converging exposure values, determined in a pre-flash stage, of a normal exposure area, an overexposure area, and an underexposure area to be normal, so as to obtain three pictures with different exposure values (S101); and synthesizing areas, with exposure values converged to be normal, in the three pictures with different exposure values into one picture (S102).

Description

Photographing method, device and computer storage medium

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a computer storage medium for photographing.

Background technique

With the development of various terminal camera photosensitive devices, the photo effect under the dark light can more and more reflect the technical advantages of the photosensitive device. The flash light, as an important fill light module for taking pictures under low light, is becoming more and more important.

At present, when the terminal uses the flash to take pictures, it is generally divided into two parts: pre-flash and main flash. The pre-flash phase calculates an exposure value (AE, Auto Exposure) of the photometric target (the subject to be photographed) under the luminance of the pre-flashed LED. In the main flash, the AE value at the main flash is directly obtained based on the difference in brightness directly from the pre-flash. The pre-flash and main flash LED current values are fixed, that is to say, the brightness value is fixed. Due to the addition of the pre-flash process, the metering target can ensure that the AE converges to normal during the pre-flash phase, that is, the exposure value on the metering target is just right. Thus, since the difference between the pre-flash and the main luminance values is determined, it is ensured that the metering target AE at the main flash is just right, so that a good quality photograph can be taken.

However, the fill light of the flash has a large difference in the reflection of the close-up and the distant view. It is difficult to make the exposure of the close-up and the distant view just right when photographing: if the close-up brightness is normal, the foreground will be black, and if the brightness of the foreground is normal, the close-up There will be overexposure.

Summary of the invention

In order to solve the existing technical problems, the embodiments of the present invention are directed to a method, a device, and a computer storage medium for solving a photo in the prior art. The difference in the reflection of the scene is large, and the brightness of the picture taken by the flash is not uniform.

To solve the above problem, the embodiment of the present invention is mainly implemented by the following technical solutions:

An embodiment of the present invention provides a method for photographing, the method comprising:

When the flash main flashes, the exposure values of the normal exposure area, the overexposed area and the underexposed area determined during the pre-flash are respectively converged to be normal, to obtain three pictures of different exposure values;

The areas in which the exposure values of the three different exposure values converge normally are combined into one picture.

In the above solution, before the exposing the exposure values of the normal exposure area, the overexposed area, and the underexposed area determined at the pre-flash, respectively, the method further includes:

Recording the exposure values of the respective preset units in the effective exposure area under the pre-flash;

Determining the normal exposure area, the overexposed area, and the underexposed area according to exposure values of respective preset units, wherein the preset unit is in an N*N block area pre-divided by an effective photosensitive area of the photosensitive device Any of the regions, N is a positive integer.

In the above solution, before the exposure values of the normal exposure area, the overexposed area, and the underexposed area determined during the pre-flashing are respectively converge to normal, the method further includes:

Calculating, respectively, the square of the difference between the exposure value of each preset unit in the preview and the exposure value of the corresponding preset unit pre-flash, and summing the squares of the difference values of the exposure values of all the preset units to obtain an accumulated value;

Correspondingly, when the accumulated value is greater than a preset threshold, the exposure values of the normal exposure area, the overexposed area, and the underexposed area are respectively converge to normal to obtain three pictures of different exposure values;

Wherein, the preset unit is any one of N*N block regions pre-divided by the effective photosensitive area of the photosensitive device.

In the above solution, the exposure values of the normal exposure area, the overexposed area, and the underexposed area determined during the pre-flash are respectively converged to obtain three pictures of different exposure values, including:

Exposing the exposure value based on the normal exposure area, so that the exposure value of the normal exposure area converges normally, and a normal exposure picture is obtained;

Exposing the exposure value based on the overexposed area, so that the exposure value of the overexposed area converges normally, and an overexposed picture is obtained;

The exposure value converges based on the underexposed area, so that the exposure value of the underexposed area converges normally, and an underexposed picture is obtained.

In the above solution, the area in which the exposure values of the three different exposure values converge normally is combined into one picture, including:

Setting weights of respective corresponding pixel points according to exposure values of respective preset units in the normal exposure picture, the overexposed picture, and the underexposed picture, respectively, and encoding the corresponding color of each pixel point by using the weight The YUV information is weighted averaged separately and integrated into one picture.

The embodiment of the invention further provides a device for photographing, the device comprising:

The convergence module is configured to converge the exposure values of the normal exposure area, the overexposed area and the underexposed area determined during the pre-flash to the normal flash to obtain three pictures of different exposure values;

The processing module is configured to synthesize a region in which the exposure values of the three different exposure values obtained by the convergence module converge to a normal picture into one picture.

In the above solution, the device further includes: a recording module and a setting module;

The recording module is configured to record an exposure value of each preset unit in the effective exposure area under pre-flash;

The setting module is configured to determine the normal exposure area, the overexposed area, and the underexposed area according to an exposure value of each preset unit recorded by the recording module, wherein the preset unit is a photosensitive device The effective photosensitive area is pre-divided into any one of the N*N block areas.

In the above solution, the device further includes: a calculation module and a determination module;

The calculating module is configured to separately calculate a square of a difference between an exposure value of each of the preset units and a preset value of a pre-flash of a preset unit when previewing, and a difference value of exposure values of all preset units Square summation, get the accumulated value;

The determining module is configured to trigger the convergence module when determining that the accumulated value is greater than a preset threshold;

In the above solution, the convergence module is further configured to: when the flash main flashes, the exposure value is converge based on the normal exposure area, so that the exposure value of the normal exposure area converges normally, and a normal exposure picture is obtained; Exposing the exposure value to make the exposure value converge, so that the exposure value of the overexposed area converges normally, and the overexposed picture is obtained; the exposure value converges based on the underexposed area, so that the exposure value of the underexposed area converges normally, and the underexposure is obtained. image.

In the above solution, the processing module includes: a setting submodule and a computing submodule;

The setting sub-module is configured to set weights of respective corresponding pixel points according to exposure values of respective preset units in the normal exposure picture, the over-exposed picture, and the under-exposed picture;

The calculation sub-module is configured to perform weighted averaging of the corresponding YUV information of each of the pixel points according to the weight of the pixel points set by the setting sub-module, and integrate the processing into one picture.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the foregoing photographing method.

The beneficial effects of the embodiments of the present invention are as follows:

The embodiment of the present invention processes the overexposed area and the underexposed area in the preflash to be normal Exposure value area, and re-integration of the processed area, finally making the brightness of the picture taken by the flash more uniform, thus effectively solving the difference in the prior art due to the difference in the reflection of the flash light to the close-range and the distant view. The problem of uneven brightness of the pictures taken.

Other features and advantages of the invention will be set forth in the description in the description which follows. The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.

DRAWINGS

1 is a flowchart of a method for photographing according to an embodiment of the present invention;

2 is a flowchart of another method for photographing according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a device for photographing according to an embodiment of the present invention; FIG.

4 is a schematic structural diagram of another apparatus for photographing according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of still another apparatus for photographing according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of still another apparatus for photographing according to an embodiment of the present invention.

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, in which FIG. For the sake of clarity and simplicity, detailed descriptions of known functions and structures in the devices described herein will be omitted when they may obscure the subject matter of the present invention.

The main purpose of the embodiments of the present invention is to provide a method, a device, and a computer storage medium for photographing. In the main flash state, the exposure values of the normal exposure area, the overexposed area, and the underexposed area of the preflash are respectively converged normally, and Three images of different exposure values, and the areas in which the exposure values of the three different exposure values converge normally are combined into a more uniform picture. In this way, the distant view and the close-up view in the picture are clear, which greatly improves the photo effect of the flash. The technical solutions of the present invention will be described in detail below through several specific embodiments.

An embodiment of the present invention provides a method for photographing. Referring to FIG. 1, the method includes:

S101. When the flash main flashes, the exposure values of the normal exposure area, the overexposed area, and the underexposed area determined during the preflash are respectively converged to be normal to obtain three pictures of different exposure values;

Specifically, when the flash is pre-flashed, the exposure value AE of the target area (the target being photographed) is made to converge normally, thereby determining the normal exposure area, the overexposed area, and the underexposed area, when the flash main flashes, according to the preflash a normal exposure area, an overexposed area, and an underexposed area respectively converge the exposure values of the normal exposure area, the overexposed area, and the underexposed area to obtain three pictures of different exposure values;

The normal exposure area in the embodiment of the present invention is a block area in the picture obtained by normalizing the exposure value of the target area, and the overexposed area and the underexposed area are defined with respect to the exposure value of the normal exposure area.

S102. Combine the regions in which the exposure values of the three different exposure values converge normally into one picture.

In the embodiment of the present invention, the overexposed area and the underexposed area in the preflash are processed into a normal exposure value area, and the processed area is re-integrated, thereby finally obtaining a picture with more uniform brightness, thereby greatly improving the image. The photo effect of the flash.

The terminal in the embodiment of the present invention may be a mobile phone, a notebook or a tablet computer or the like that performs photographing by a flash.

The step of determining the normal exposure area, the overexposed area, and the underexposed area in the embodiment of the present invention specifically includes: recording the exposure values of each preset unit in the effective exposure area under the pre-flashing under the normal condition of AE convergence; according to each preset The exposure value of the unit determines the normal exposure area, the overexposed area, and the underexposed area, wherein the predetermined unit is a pre-divided N*N (N is a positive integer) block of the photosensitive photosensitive area of the photosensitive device Any area in the area.

That is, the embodiment of the present invention divides the effective photosensitive area of the photosensitive device into N*N block areas in advance, and the preset unit is any one of the N*N block areas, and pre-flashes, so that the exposure value AE of the target area converges normally. And recording the exposure values of the respective preset units, and determining the normal exposure area, the overexposed area, and the underexposed area according to the exposure values of the respective preset units pre-flashed.

The effective exposure regions of the embodiments of the present invention include a normal exposure region, an overexposed region, and an underexposed region.

The method of the embodiment of the present invention further includes: respectively calculating a difference between an exposure value of each preset unit and an exposure value of a corresponding preset unit pre-flash when previewing (previewing a state of the pre-flash front terminal) Squared, and summed the square of the difference of the exposure values of all the preset units to obtain an accumulated value;

When the accumulated value is less than the preset threshold, it indicates that the flash does not substantially function as a fill light, and the picture output of the overexposed area and the underexposed area is not performed;

When the accumulated value is greater than a preset threshold, the exposure values of the normal exposure area, the overexposed area, and the underexposed area are respectively converged to obtain three pictures of different exposure values;

That is, the embodiment of the present invention first obtains the square of the difference between the exposure value of the preview of all the preset units and the exposure value of the pre-flash, and then accumulates the square of the difference of the exposure values of all the preset units to obtain An accumulated value is compared with a preset threshold to further determine whether to output three pictures of different exposure values.

In the embodiment of the present invention, the exposure values of the normal exposure area, the overexposed area, and the underexposed area are respectively condensed to be normal, and the step of obtaining three pictures of different exposure values specifically includes:

The exposure value is condensed based on the normal exposure area, so that the exposure value of the normal exposure area converges normally, and a normal exposure picture is obtained, that is, a picture with a clear target area is obtained.

The exposure value converges based on the overexposed area, so that the exposure value of the overexposed area converges normally, and an overexposed picture is obtained, that is, a picture with a clear overexposed area is obtained, in which case the normal exposed area and the underexposed area may not be clear. .

And exposing the exposure value based on the underexposed area, so that the exposure value of the underexposed area converges normally, and an underexposed picture is obtained, that is, a picture with a clear underexposed area is obtained, in which case the normal exposed area and the overexposed area may not be clear. .

In the embodiment of the present invention, the step of synthesizing the regions in which the exposure values of the three different exposure values are normalized into one picture comprises:

Setting weights of respective corresponding pixel points according to exposure values of respective preset units in the normal exposure picture, the overexposed picture, and the underexposed picture, respectively, and encoding the corresponding color of each pixel point by using the weight The YUV information is weighted averaged and combined into one picture.

Specifically, the weight of the pixel corresponding to the preset unit in which the exposure value in the picture is converged is set to be high, and the weight of the pixel corresponding to the preset unit in which the exposure value of the picture is not converged is low, and then The corresponding YUV information of the pixel points are respectively weighted and averaged, and further synthesized into a picture with more uniform brightness.

For example, the method of calculating the weighted average of the YUV information of the i-th pixel is as follows:

Y _i = (aY _iH + b Y _iM + c Y _iL ) / a + b + c;

U _i =(aU _iH +b U _iM +c U _iL )/a+b+c;

V _i =(aV _iH +b V _iM +c V _iL )/a+b+c;

Wherein: a=0.1, b=0.8, c=0.1, H: represents an overexposed picture; M: represents an exposure normal picture; L: represents an underexposed picture;

After the weighted averaging, the YUV information of the i-th pixel point is obtained, and so on, the YUV information of all the pixel points in the picture is obtained, thereby obtaining a picture with uniform final brightness.

The above method for calculating the YUV information of the picture is only a specific example for better understanding of the present invention, and those skilled in the art may also use the other algorithms to perform the above three sheets. The image is processed as long as the final processed image is made clearer.

FIG. 2 is a flowchart of another method for photographing according to an embodiment of the present invention. The following describes the embodiment of the present invention in detail with reference to FIG. 2:

S201, turning on the mobile phone camera, entering the camera preview mode, so that the AE convergence is normal, and recording the exposure value;

Specifically, taking the target area of the shot as an exposure object, respectively calculating the exposure condition of each preset unit, and saving;

S202. If the camera flash mode is set to the Auto mode, determine whether the current environment needs to open the flash, and if necessary, turn on the flash. If the camera flash mode is set to the On mode, the flash is directly turned on when photographing;

S203. If the flash needs to be turned on, press the camera button to turn on the pre-flash function, so that the target area AE converges normally, and the exposure value is recorded;

The pre-flash current value is fixed, and the target area is exposed as an exposure object, and the exposure values of each preset unit are respectively calculated, and the normal exposure area, the overexposed area, and the underexposure are determined according to the exposure values of the respective preset units in the preflash. Area, save;

S204, the main flash of the flash, and three images are respectively output based on the exposure values during the pre-flash, respectively: a normal exposure picture, an overexposed picture, and an underexposed picture;

Since the LED current value during the pre-flash and the LED current value at the main flash are fixed, the brightness is linear. Therefore, according to the AE at the pre-flash, the AE value at the main flash can be calculated, and the main flash is based on the pre-flash. The normal exposure area, the overexposed area and the underexposed area respectively converge the exposure values of the normal exposure area, the overexposed area and the underexposed area to obtain three pictures of different exposure values;

Before outputting three pictures, you need to make the following judgment process, specifically:

Calculating, respectively, the square of the difference between the exposure value of each of the preset units and the exposure value of the corresponding preset unit pre-flash when previewing, and summing the squares of the difference values of the exposure values of all the preset units, Get the accumulated value;

When the accumulated value is greater than a preset threshold, the exposure value is condensed based on the normal exposure area, so that the exposure value of the normal exposure area converges normally, and a normal exposure picture is obtained; and the exposure value is condensed based on the over-exposed area. So that the exposure value of the overexposed area converges normally, and an overexposed picture is obtained; the exposure value converges based on the underexposed area, so that the exposure value of the underexposed area converges normally, and an underexposed picture is obtained;

S205. Combine the three pictures into one picture and save it.

That is, the regions in which the exposure values of the three different exposure values converge normally are combined into one picture, specifically, according to the preset positions of the normal exposure picture, the overexposed picture, and the underexposed picture, respectively. The exposure value sets the weight of each corresponding pixel point, and weights the corresponding YUV information of each of the pixel points to form a picture.

An embodiment of the present invention further provides a device for photographing. Referring to FIG. 3, the device includes: a convergence module 11 and a processing module 12 connected to each other;

The convergence module 11 is configured to converge the exposure values of the normal exposure area, the overexposed area and the underexposed area determined during the preflash to the normal flash to obtain three pictures of different exposure values;

The processing module 12 is configured to combine the regions in which the exposure values of the three different exposure values obtained by the convergence module 11 converge to a normal picture into one picture.

FIG. 4 is a schematic structural diagram of another apparatus for photographing according to an embodiment of the present invention. As shown in FIG. 4, FIG. 4 is a preferred apparatus according to an embodiment of the present invention, and the apparatus further includes Recording module 13 and setting module 14;

Recording, by the recording module 13, the exposure of each preset unit in the effective exposure area under the pre-flash a light value; the setting module 14 determines the normal exposure area, the overexposed area, and the underexposed area according to the exposure values of the respective preset units recorded by the recording module 13, wherein the preset unit is Any one of the N*N block regions pre-divided by the effective photosensitive area of the photosensitive device.

FIG. 5 is a schematic structural diagram of still another apparatus for photographing according to an embodiment of the present invention. As shown in FIG. 5, FIG. 5 is a preferred apparatus according to an embodiment of the present invention. The device further includes a calculation module 15 and a determination module 16;

The calculating module 15 respectively calculates the square of the difference between the exposure value of each preset unit and the exposure value of the corresponding preset unit pre-flash when previewing, and the square of the difference between the exposure values of all the preset units Summing, getting the accumulated value;

When the determining module 16 determines that the accumulated value is greater than a preset threshold, the convergence module 11 is triggered;

Specifically, the convergence module 11 is configured to converge the exposure value based on the normal exposure area, the overexposed area, and the underexposed area according to the pre-flash, when the main flash is flashed, so that the normal exposure area is The exposure value converges normally, and a normal exposure picture is obtained; the exposure value converges based on the overexposed area, so that the exposure value of the overexposed area converges normally, and an overexposed picture is obtained; and the exposure value converges based on the underexposed area, so that The exposure value of the underexposed area converges normally, and an underexposed picture is obtained.

FIG. 6 is a schematic structural diagram of still another apparatus for photographing according to an embodiment of the present invention. As shown in FIG. 6, the processing module 12 further includes: a setting sub-module 121 and a computing sub-module 122;

The setting sub-module 121 sets the weights of the respective corresponding pixel points according to the exposure values of the preset units in the normal exposure picture, the over-exposed picture, and the under-exposed picture, respectively;

The calculation sub-module 122 performs the weighted average of the YUV information of each of the pixel points according to the weight of the pixel points set by the setting sub-module 121, and synthesizes a picture.

The content of the device in the embodiment of the present invention can be understood by referring to related content in the method part, and details are not described herein again.

The method, device and computer storage medium provided by the embodiments of the present invention can bring the following beneficial effects:

In the embodiment of the present invention, the overexposed area and the underexposed area in the preflash are processed into a normal exposure value area, and the processed area is re-integrated, thereby finally obtaining a picture with uniform brightness, and the picture is made in this way. The medium and long-range scenes are clear, which greatly improves the photo effect of the flash.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Industrial applicability

The photographing method and device and the computer storage medium provided by the embodiment of the invention converge the exposure values of the normal exposure area, the overexposed area and the underexposed area determined during the preflash to the normal flash to obtain three sheets. A picture of different exposure values; the areas in which the exposure values of the three different exposure values converge normally are combined into one picture. In the embodiment of the present invention, the overexposed area and the underexposed area in the preflash are processed into a normal exposure value area, and the processed area is re-integrated, and finally a picture with uniform brightness is obtained, and the picture is made in this way. The medium and long-range scenes are clear, which greatly improves the photo effect of the flash.

Claims

A method of photographing, the method comprising:

When the flash main flashes, the exposure values of the normal exposure area, the overexposed area and the underexposed area determined during the pre-flash are respectively converged to be normal, to obtain three pictures of different exposure values;

The areas in which the exposure values of the three different exposure values converge normally are combined into one picture.
The method according to claim 1, wherein before the exposing the exposure values of the normal exposure area, the overexposed area, and the underexposed area determined at the pre-flash, respectively, the method further comprises:

Recording the exposure values of the respective preset units in the effective exposure area under the pre-flash;

Determining the normal exposure area, the overexposed area, and the underexposed area according to exposure values of respective preset units, wherein the preset unit is in an N*N block area pre-divided by an effective photosensitive area of the photosensitive device Any of the regions, N is a positive integer.
The method according to claim 1, wherein before the exposure values of the normal exposure area, the overexposed area, and the underexposed area determined at the pre-flash are respectively converge to normal, the method further includes:

Calculating, respectively, the square of the difference between the exposure value of each preset unit in the preview and the exposure value of the corresponding preset unit pre-flash, and summing the squares of the difference values of the exposure values of all the preset units to obtain an accumulated value;

Correspondingly, when the accumulated value is greater than a preset threshold, the exposure values of the normal exposure area, the overexposed area, and the underexposed area are respectively converge to normal to obtain three pictures of different exposure values;

Wherein, the preset unit is any one of N*N block regions pre-divided by the effective photosensitive area of the photosensitive device, and N is a positive integer.
The method according to any one of claims 1 to 3, wherein said pre-flashing time The exposure values of the normal exposure area, the overexposed area, and the underexposed area respectively converge to normal to obtain three pictures of different exposure values, including:

Exposing the exposure value based on the normal exposure area, so that the exposure value of the normal exposure area converges normally, and a normal exposure picture is obtained;

Exposing the exposure value based on the overexposed area, so that the exposure value of the overexposed area converges normally, and an overexposed picture is obtained;

The exposure value converges based on the underexposed area, so that the exposure value of the underexposed area converges normally, and an underexposed picture is obtained.
The method according to claim 4, wherein said synthesizing the areas in which the exposure values of the three different exposure values converge normally into a picture comprises:

Setting weights of respective corresponding pixel points according to exposure values of respective preset units in the normal exposure picture, the overexposed picture, and the underexposed picture, respectively, and encoding the corresponding color of each pixel point by using the weight The YUV information is weighted averaged separately and integrated into one picture.
A device for photographing, the device comprising:

The convergence module is configured to converge the exposure values of the normal exposure area, the overexposed area and the underexposed area determined during the pre-flash to the normal flash to obtain three pictures of different exposure values;

The processing module is configured to synthesize a region in which the exposure values of the three different exposure values obtained by the convergence module converge to a normal picture into one picture.
The device according to claim 6, wherein the device further comprises: a recording module and a setting module;

The recording module is configured to record an exposure value of each preset unit in the effective exposure area under pre-flash;

The setting module is configured to perform exposure according to each preset unit recorded by the recording module The value determines the normal exposure area, the overexposed area, and the underexposed area, wherein the predetermined unit is any one of N*N block areas pre-divided by the effective photosensitive area of the photosensitive device, N is A positive integer.
The device according to claim 6, wherein the device further comprises: a calculation module and a determination module;

The calculating module is configured to separately calculate a square of a difference between an exposure value of each preset unit in preview and an exposure value of a corresponding preset unit pre-flash, and a square of a difference between exposure values of all preset units Summing, getting the accumulated value;

The determining module is configured to trigger the convergence module when determining that the accumulated value is greater than a preset threshold;

Wherein, the preset unit is any one of N*N block regions pre-divided by the effective photosensitive area of the photosensitive device, and N is a positive integer.
The apparatus according to any one of claims 6 to 8, wherein the convergence module is further configured to cause an exposure value to converge based on the normal exposure area when the flash main flashes, such that the normal exposure area The exposure value converges normally, and a normal exposure picture is obtained; the exposure value converges based on the overexposed area, so that the exposure value of the overexposed area converges normally, and an overexposed picture is obtained; and the exposure value converges based on the underexposed area, so that The exposure value of the underexposed area converges normally, and an underexposed picture is obtained.
The apparatus according to claim 9, wherein the processing module comprises: a setting submodule and a computing submodule;

The setting sub-module is configured to set weights of respective corresponding pixel points according to exposure values of respective preset units in the normal exposure picture, the over-exposed picture, and the under-exposed picture;

The calculating sub-module is configured to weight the corresponding color-coded YUV information of each of the pixel points according to the weight of the pixel points set by the setting sub-module Both are integrated into one picture.
A computer storage medium having stored therein computer executable instructions for performing the method of any one of claims 1 to 5.