CN110545375B - Image processing method, image processing device, storage medium and electronic equipment - Google Patents
Image processing method, image processing device, storage medium and electronic equipment Download PDFInfo
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- CN110545375B CN110545375B CN201910772376.7A CN201910772376A CN110545375B CN 110545375 B CN110545375 B CN 110545375B CN 201910772376 A CN201910772376 A CN 201910772376A CN 110545375 B CN110545375 B CN 110545375B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
- H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
Abstract
The application discloses an image processing method, an image processing device, a storage medium and an electronic device. The method comprises the following steps: acquiring images of a shooting scene through a color camera and a black-and-white camera to obtain a color image and a black-and-white image; determining the brightness of the color image and the brightness of the black and white image; determining target brightness according to the brightness of the color image and the brightness of the black-and-white image; and adjusting the brightness of the color image to the target brightness to obtain a target image. The imaging quality can be improved.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to an image processing method and apparatus, a storage medium, and an electronic device.
Background
With the development of electronic technology, more and more electronic devices have an image acquisition function, and a user can acquire images through a camera of the electronic device.
Currently, when a camera of an electronic device is used to acquire an image in a dark or bright environment, the acquired image may have a dark or bright brightness. In the related art, for the above situation, for example, a dark image, the electronic device performs brightness enhancement processing on the image with a randomly determined brightness. However, although the processing may improve the brightness of the image, the brightness of the image may be adjusted to be too bright, resulting in poor imaging quality.
Disclosure of Invention
The embodiment of the application provides an image processing method, an image processing device, a storage medium and an electronic device, which can improve imaging quality.
The embodiment of the application provides an image processing method, which is applied to electronic equipment, wherein the electronic equipment comprises a color camera and a black and white camera, and the method comprises the following steps:
acquiring images of a shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image;
determining the brightness of the color image and the brightness of the black and white image;
determining target brightness according to the brightness of the color image and the brightness of the black-and-white image;
and adjusting the brightness of the color image to the target brightness to obtain a target image.
The embodiment of the present application provides an image processing apparatus, which is applied to an electronic device, where the electronic device includes a color camera and a black and white camera, and includes:
the acquisition module is used for acquiring images of a shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image;
the first determining module is used for determining the brightness of the color image and the brightness of the black-and-white image;
the second determining module is used for determining the target brightness according to the brightness of the color image and the brightness of the black-and-white image;
and the adjusting module is used for adjusting the brightness of the color image to the target brightness to obtain a target image.
The embodiment of the application provides a storage medium, wherein a computer program is stored on the storage medium, and when the computer program is executed on a computer, the computer is enabled to execute the flow in the image processing method provided by the embodiment of the application.
The embodiment of the present application further provides an electronic device, which includes a memory and a processor, where the processor is configured to execute the flow in the image processing method provided by the embodiment of the present application by calling the computer program stored in the memory.
In the embodiment of the application, relatively speaking, the brightness of the color image is relatively low, the brightness of the black-and-white image is relatively high, the target brightness is determined by combining the brightness of the relatively low color image and the brightness of the relatively high black-and-white image, the determined target brightness can be in a proper brightness range, and the brightness of the color image is adjusted to the target brightness, so that the color image cannot be too dark, and the color image cannot be too bright. Therefore, the image processing method provided by the application can improve the imaging quality.
Drawings
The technical solutions and advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic flowchart of a first image processing method according to an embodiment of the present application.
Fig. 2 is a schematic flowchart of a second image processing method according to an embodiment of the present application.
Fig. 3 is a schematic flowchart of a third image processing method according to an embodiment of the present application.
Fig. 4 is a fourth flowchart illustrating an image processing method according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of an image processing apparatus according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a camera arranged in an electronic device according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of a first electronic device according to an embodiment of the present application.
Fig. 8 is a schematic structural diagram of a second electronic device according to an embodiment of the present application.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements, the principles of the present application are illustrated as being implemented in a suitable computing environment. The following description is based on illustrated embodiments of the application and should not be taken as limiting the application with respect to other embodiments that are not detailed herein.
It is understood that the execution subject of the embodiment of the present application may be an electronic device such as a smart phone or a tablet computer.
Referring to fig. 1, fig. 1 is a schematic flowchart of a first image processing method provided in an embodiment of the present application, where the image processing method is applicable to an electronic device, the electronic device includes a color camera and a black-and-white camera, and the process may include:
101. and acquiring images of the shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image.
For example, after operating the electronic device to start a shooting application (e.g., a system application "camera" of the electronic device), and moving the electronic device to align a color camera and a black-and-white camera of the electronic device with a shooting scene, a user may input an image shooting request to the electronic device by clicking a "shooting" key (which is a virtual key) provided in a "camera" preview interface. When receiving the image shooting request, the electronic device can acquire images of a shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image. Or after the color camera and the black-and-white camera of the electronic device are aligned with the shooting scene, the electronic device can acquire images of the shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image.
The distances from the color camera and the black-and-white camera to the shooting scene are basically the same, and the shooting angles of the two cameras relative to the shooting scene are basically the same, so that the contents of the acquired images are basically the same when the two cameras acquire the images of the shooting scene. Wherein substantially the same means that the difference in the distance or the photographing angle is negligibly small. Substantially consistent means that the difference in image content obtained by the two cameras is negligibly small.
After the electronic device starts a shooting application program (for example, a system application "camera" of the electronic device) according to a user operation, a scene aimed at by a camera of the electronic device is a shooting scene. For example, after the user clicks an icon of a "camera" application on the electronic device with a finger to start the "camera application", if the user uses a camera of the electronic device to align a scene including an XX object, the scene including the XX object is a shooting scene. From the above description, it will be understood by those skilled in the art that the shooting scene is not specific to a particular scene, but is a scene aligned in real time following the orientation of the camera.
102. The brightness of the color image is determined, as well as the brightness of the black and white image.
For example, after obtaining a color image and a black-and-white image, the electronic device can determine the brightness of the color image, as well as the brightness of the black-and-white image. The brightness of the color image may be the brightness of the whole color image, the brightness of one pixel point, or the brightness of a plurality of sub-areas included in the color image. The brightness of the black-and-white image may be the brightness of the whole black-and-white image, the brightness of one pixel point, or the brightness of a plurality of sub-areas included in the black-and-white image.
103. And determining the target brightness according to the brightness of the color image and the brightness of the black-and-white image.
Relatively speaking, a color image is darker in brightness and a black-and-white image is brighter in brightness. The target brightness is determined by combining the brightness of the darker color image and the brightness of the brighter black-and-white image, so that the determined target brightness is in a proper brightness range. The electronic device adjusts the brightness of the color image to the target brightness without making the color image too dark or too bright. .
104. And adjusting the brightness of the color image to the target brightness to obtain the target image.
For example, after determining the target brightness, the electronic device may adjust the brightness of the color image to the target brightness to obtain the target image. For example, when the brightness of the color image is too dark, the electronic device may determine a target brightness that is close to the brightness of the black-and-white image, and then adjust the brightness of the color image to the target brightness to obtain the target image.
In the embodiment of the application, relatively speaking, the brightness of the color image is relatively low, the brightness of the black-and-white image is relatively high, the target brightness is determined by combining the brightness of the relatively low color image and the brightness of the relatively high black-and-white image, the determined target brightness can be in a proper brightness range, and the brightness of the color image is adjusted to the target brightness, so that the color image cannot be too dark, and the color image cannot be too bright. Therefore, the image processing method provided by the application can improve the imaging quality.
In some embodiments, the flow 102 may include:
dividing the color image into a plurality of color regions;
determining the brightness of each color region;
determining an area with the brightness larger than or equal to a preset brightness threshold value in the plurality of colored areas as a first area;
determining an area with the brightness smaller than or equal to a preset dark threshold value in the plurality of colored areas as a second area;
determining an area with the brightness smaller than a preset bright threshold value and larger than a preset dark threshold value in the plurality of colored areas as a third area;
dividing the black-and-white image into a plurality of black-and-white areas;
determining a fourth area corresponding to the first area, a fifth area corresponding to the second area and a sixth area corresponding to the third area from the plurality of black and white areas;
the brightness of the fourth, fifth and sixth regions is determined.
The process 103 may include:
and determining the target brightness according to the brightness of the first area, the brightness of the second area, the brightness of the third area, the brightness of the fourth area, the brightness of the fifth area and the brightness of the sixth area.
In some embodiments, determining the target brightness according to the brightness of the first region, the brightness of the second region, the brightness of the third region, the brightness of the fourth region, the brightness of the fifth region, and the brightness of the sixth region may include:
multiplying the brightness of the first area by a seventh weight value to obtain seventh brightness;
multiplying the brightness of the fourth area by an eighth weight value to obtain an eighth brightness, wherein the seventh weight value is greater than the eighth weight value;
multiplying the brightness of the second area by an eighth weight value to obtain ninth brightness;
multiplying the brightness of the fifth area by a seventh weight value to obtain a tenth brightness;
adding the seventh brightness and the eighth brightness to obtain the target brightness of the first area;
adding the ninth brightness and the tenth brightness to obtain target brightness of a second area;
and calculating the average value of the brightness of the third area and the brightness of the sixth area to obtain the target brightness of the third area.
The process 104 may include:
and adjusting the brightness of the first area to the target brightness of the first area, adjusting the brightness of the second area to the target brightness of the second area, and adjusting the brightness of the third area to the target brightness of the third area to obtain the target image.
For example, when the color image has a dark brightness in a partial region, and a moderate brightness in a partial region, the electronic device may adjust the brightness of the color image in different regions.
In the partitioning, the electronic device may detect a change in brightness of the color image in advance. When the difference of brightness change of the color image is large, each subarea is small; when the difference in the brightness variation of the color image is small, each of the partitions is large. Wherein the partition size is in pixels. For example, each partition is 3 x 3 pixels.
In the embodiment of the present application, after dividing the color image into a plurality of color regions according to the above-described partitioning method, the electronic device may determine the luminance of each color region. Then, the electronic device may determine, as the first region, a region having a luminance greater than or equal to a preset luminance threshold value among the plurality of colored regions; determining an area with the brightness smaller than or equal to a preset dark threshold value in the plurality of colored areas as a second area; and determining an area with the brightness smaller than a preset bright threshold value and larger than a preset dark threshold value in the plurality of colored areas as a third area. Then, the electronic device may divide the black-and-white image into a plurality of black-and-white regions in the same partition manner as the color image, and determine a fourth region corresponding to the first region, a fifth region corresponding to the second region, and a sixth region corresponding to the third region from the plurality of black-and-white regions.
Subsequently, the electronic device can determine the brightness of the fourth region, the fifth region, and the sixth region. Finally, the electronic device may determine the target brightness according to the brightness of the first region, the brightness of the second region, the brightness of the third region, the brightness of the fourth region, the brightness of the fifth region, and the brightness of the sixth region.
It is understood that the size of the first area is the same as the size of the third area, the size of the second area is the same as the size of the fourth area, and the size of the third area is the same as the size of the sixth area. The first area is located at the same position in the color image as the fourth area in the black-and-white image, the second area is located at the same position in the color image as the fifth area in the black-and-white image, and the third area is located at the same position in the color image as the sixth area in the black-and-white image. For example, if the first region is in the upper left corner of a color image, then the fourth region is also in the upper left corner of a black and white image.
In this embodiment, the electronic device may multiply the brightness of the first area by a larger weight value, that is, a seventh weight value, to obtain a seventh brightness, and multiply the brightness of the fourth area by a smaller weight value, that is, an eighth weight value, to obtain an eighth brightness. Then, the electronic device may add the seventh luminance and the eighth luminance to obtain the target luminance of the first region. Because the brightness of the fourth area is brighter than that of the first area, for the first area with brighter brightness, the brightness of the fourth area can be multiplied by a smaller weight value, so that the finally determined target brightness is not too large, and the first area adjusted to the target brightness is not too bright.
Similarly, because the brightness of the fifth area is brighter than that of the second area, for the second area with darker brightness, the brightness of the fifth area can be multiplied by a larger weight value, so that the finally determined target brightness cannot be too small, and the second area adjusted to the target brightness cannot be too dark.
For the third area with moderate brightness, the electronic device may calculate an average value of the brightness of the third area and the brightness of the sixth area to obtain the target brightness of the third area, so that the brightness of the third area adjusted to the target brightness is brighter than the original brightness, but still in a proper brightness range.
In some embodiments, the color and black-and-white images may be color and black-and-white facial images. The color face image and the black-and-white face image are a color image and a black-and-white image including a face.
For example, the electronic device may further obtain depth information, and then calculate point cloud data according to the color face image and the depth information through a preset algorithm. Then, the electronic device can perform three-dimensional reconstruction on the human face according to the point cloud data to generate a three-dimensional human face model. Subsequently, the electronic device may determine the brightness of the color face image, and determine the brightness corresponding to the three-dimensional face model according to the brightness. Then, the electronic device may determine the brightness of the black-and-white face image, and adjust the brightness corresponding to the three-dimensional face model based on the brightness of the black-and-white face image, so as to obtain the target brightness corresponding to the three-dimensional face model. Finally, the electronic device can map the target brightness corresponding to the three-dimensional face model into the color face image so as to adjust the brightness of the color face image.
Referring to fig. 2, fig. 2 is a schematic flow chart of an image processing method according to an embodiment of the present application, where the flow chart may include:
201. the electronic equipment acquires images of a shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image.
For example, after operating the electronic device to start a shooting application (e.g., a system application "camera" of the electronic device), and moving the electronic device to align a color camera and a black-and-white camera of the electronic device with a shooting scene, a user may input an image shooting request to the electronic device by clicking a "shooting" key (which is a virtual key) provided in a "camera" preview interface. When receiving the image shooting request, the electronic device can acquire images of a shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image. Or after the color camera and the black-and-white camera of the electronic device are aligned with the shooting scene, the electronic device can acquire images of the shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image.
The distances from the color camera and the black-and-white camera to the shooting scene are basically the same, and the shooting angles of the two cameras relative to the shooting scene are basically the same, so that the contents of the acquired images are basically the same when the two cameras acquire the images of the shooting scene. Wherein substantially the same means that the difference in the distance or the photographing angle is negligibly small. Substantially consistent means that the difference in image content obtained by the two cameras is negligibly small.
Alternatively, two cameras having the same field of view may be provided in the electronic apparatus, and the two cameras may have the same field angle and the same size of the display area of the image. The image signal processing image zooming technology and the image independent mode ensure that the image display areas of the two cameras are the same in size, and the field angles of the two cameras placed at different positions are the same through the error calculation, correction and other technologies, so that the contents of the images acquired by the two cameras are basically the same.
The two cameras with the same field angle include a color camera and a black-and-white camera. The color camera is used for acquiring color images, and the black-and-white camera is used for acquiring black-and-white images.
Or, when the image contents of the color image obtained by the color camera and the black-and-white image obtained by the black-and-white camera are inconsistent due to the hardware setting, the electronic device may counteract the image deviation caused by the difference of the optical centers as much as possible by calibrating the position relationship between the two cameras, so that the contents of the color image and the contents of the black-and-white image are basically consistent.
After the electronic device starts a shooting application program (for example, a system application "camera" of the electronic device) according to a user operation, a scene aimed at by a camera of the electronic device is a shooting scene. For example, after the user clicks an icon of a "camera" application on the electronic device with a finger to start the "camera application", if the user uses a camera of the electronic device to align a scene including an XX object, the scene including the XX object is a shooting scene. From the above description, it will be understood by those skilled in the art that the shooting scene is not specific to a particular scene, but is a scene aligned in real time following the orientation of the camera.
202. The electronics determine the brightness of the color image, as well as the brightness of the black and white image.
For example, after obtaining a color image and a black-and-white image, the electronic device can determine the brightness of the color image, as well as the brightness of the black-and-white image. The brightness of the color image may be the brightness of the whole color image, the brightness of one pixel point, or the brightness of a plurality of sub-areas included in the color image. The brightness of the black-and-white image may be the brightness of the whole black-and-white image, the brightness of one pixel point, or the brightness of a plurality of sub-areas included in the black-and-white image.
Because the black-and-white camera only comprises the photosensitive element, does not comprise any color filter or color filter array, and can receive all natural light signals, the photosensitive element can record the intensity of all light simultaneously, and the light transmittance is higher, so that the black-and-white image under the same shooting environment has the advantages of high light sampling rate and low noise compared with a color image. Meanwhile, since each photosensitive element records only intensity information of light and has no color information, a black-and-white image itself is a luminance image. That is, for the whole picture, the brightness of the color image is smaller than that of the black-and-white image, and for a single pixel, the brightness of the single pixel of the color image is smaller than that of the corresponding single pixel of the black-and-white image.
203. The electronic device determines a comparison of the brightness of the color image to a preset dark threshold and a preset bright threshold.
For example, after determining the brightness of the color image, the electronic device may determine a comparison of the brightness of the color image to a preset dark threshold and a preset bright threshold.
Wherein the preset bright threshold and the preset dark threshold may be determined by the electronic device. For example, when the brightness of the color image is greater than the preset bright threshold, the brightness of the color image is brighter, but the color image is not overexposed. When the brightness of the color image is less than the preset dark threshold, the brightness of the color image is too dark, resulting in unclear image. For example, the image appears black.
Alternatively, the preset bright threshold and the preset dark threshold may be determined by a user. For example, the electronic device may display color images with different brightness, and the user may click on the color images, so that the electronic device obtains the brightness of the corresponding color image, and determines the brightness as the preset bright threshold or the preset dark threshold. For example, assume that the electronic device displays color image a, color image B, color image C, and color image D. And clicking the color image A by the user, and instructing the electronic equipment to acquire the brightness of the color image A, and determining the brightness as a preset brightness threshold. Then, the electronic device may acquire the luminance of the color image a, and determine the luminance as the preset luminance threshold. The user can click on the color image D and instruct the electronic equipment to acquire the brightness of the color image D, and the brightness is determined as the preset dark threshold. Then, the electronic device may acquire the luminance of the color image D, and determine the luminance as the preset dark threshold.
204. The electronic device determines the target brightness according to the comparison result, the brightness of the color image and the brightness of the black and white image.
For example, after determining the comparison result of the brightness of the color image with the preset dark threshold and the preset bright threshold, the electronic device may determine the target brightness according to the comparison result, the brightness of the color image, and the brightness of the black-and-white image. For example, the electronic device may determine a weight value corresponding to the brightness of the color image and a weight value corresponding to the brightness of the black-and-white image according to the comparison result, and then weight the brightness of the color image and the brightness of the black-and-white image to obtain the target brightness.
205. And the electronic equipment adjusts the brightness of the color image to the target brightness to obtain the target image.
For example, after determining the target brightness, the electronic device may adjust the brightness of the color image to the target brightness to obtain the target image.
In some embodiments, after obtaining the target image, the electronic device may perform a preview or photographing or recording operation of the image by using the target image. For example, the electronic device may display the target image on a preview interface of a camera application of the electronic device for user preview. Alternatively, when the electronic device receives a photographing instruction, for example, the user presses a photographing button, the electronic device may directly display the target image as a photo output on the display screen for the user to view. Or, when the electronic device receives the video recording instruction, the electronic device may use the target image as one of the frames of the video obtained by video recording.
As shown in fig. 3, in some embodiments, flow 204 may include:
20401. if the comparison result is that the brightness of the color image is smaller than or equal to the preset dark threshold, the electronic equipment multiplies the brightness of the color image by a first weight value to obtain first brightness, and multiplies the brightness of the black-and-white image by a second weight value to obtain second brightness, wherein the first weight value is smaller than the second weight value.
20402. The electronic device adds the first brightness and the second brightness to obtain the target brightness.
For example, when the brightness of the color image is less than or equal to the preset dark threshold as a result of the comparison, it indicates that the brightness of the color image is not bright enough. Then, the electronic device may multiply the brightness of the color image by a smaller weight value, i.e., a first weight value, to obtain a first brightness, and multiply the brightness of the black-and-white image by a larger weight value, i.e., a second weight value, to obtain a second brightness. For example, the first weight value may be 10%, and the second weight value may be 90%. The electronic device may then add the first luminance and the second luminance to obtain a target luminance.
In some embodiments, when the comparison result is that the brightness of the color image is less than or equal to the preset dark threshold, the electronic device may directly determine the brightness of the black-and-white image as the target brightness.
In other embodiments, the electronic device may set the mapping relationship between the weight value and the brightness when the comparison result is that the brightness of the color image is less than or equal to the preset dark threshold. Then, when the comparison result is that the brightness of the color image is less than or equal to the preset dark threshold, the electronic device may determine a weight value corresponding to the brightness of the color image according to the mapping relationship, obtain a first weight value, and thus obtain a second weight value. It can be known that the sum of the first weight value and the second weight value is 1.
As shown in fig. 4, in other embodiments, flow 204 may include:
20411. if the comparison result is that the brightness of the color image is greater than or equal to the preset brightness threshold value, the electronic equipment multiplies the brightness of the color image by a third weight value to obtain a third brightness, and multiplies the brightness of the black-and-white image by a fourth weight value to obtain a fourth brightness, wherein the third weight value is greater than the fourth weight value.
20412. And the electronic equipment adds the third brightness and the fourth brightness to obtain the target brightness.
For example, when the brightness of the color image is greater than or equal to the preset brightness threshold as a result of the comparison, it indicates that the brightness of the color image is sufficient. Then, the electronic device may multiply the brightness of the color image by a larger weight value, i.e., a third weight value, to obtain a third brightness, and multiply the brightness of the black-and-white image by a smaller weight value, i.e., a fourth weight value, to obtain a fourth brightness. For example, the third weight value may be 99%, and the fourth weight value may be 1%. Subsequently, the electronic device may add the third luminance and the fourth luminance to obtain the target luminance.
In some embodiments, the electronic device may not adjust the brightness of the color image when the comparison result is that the brightness of the color image is greater than or equal to a preset brightness threshold.
In other embodiments, the electronic device may set the mapping relationship between the weight value and the brightness when the comparison result is that the brightness of the color image is greater than or equal to a preset brightness threshold. Then, when the comparison result is that the brightness of the color image is greater than or equal to the preset brightness threshold, the electronic device may determine a weight value corresponding to the brightness of the color image according to the mapping relationship, obtain a third weight value, and thus obtain a fourth weight value. It can be known that the sum of the third weight value and the fourth weight value is 1.
In some embodiments, when the brightness of the color image is greater than the preset brightness threshold, the electronic device may determine again whether the brightness of the color image is greater than the preset brightness threshold, wherein when the brightness of the color image is greater than the preset brightness threshold, the brightness of the color image is too bright, resulting in poor quality of the image. In this case, the electronic device may adjust the brightness of the color image to be low so that the brightness of the color image is relatively moderate.
In some embodiments, flow 204 may include:
and if the comparison result is that the brightness of the color image is greater than the preset dark threshold and less than the preset bright threshold, the electronic equipment calculates the average value of the brightness of the color image and the brightness of the black-and-white image to obtain the target brightness.
For example, when the comparison result is that the brightness of the color image is greater than the preset dark threshold and less than the preset bright threshold, it indicates that the brightness of the color image is relatively moderate, and the brightness of the black image is relatively bright but relatively moderate with respect to the brightness of the color image. Then, the electronic device may calculate an average of the luminance of the color image and the luminance of the black image to obtain the target luminance. It is known that the target brightness is between the brightness of the color image and the brightness of the black image, and adjusting the color image to the target brightness can make the quality of the color image better.
In other embodiments, after the process 205, the method may further include:
the electronic equipment displays a target image;
the electronic equipment receives selection operation of a user;
the electronic equipment determines an adjusting area in the target image according to the selection operation;
the electronic equipment acquires brightness selected by a user;
the electronic equipment adjusts the brightness of the adjusting area to the brightness selected by the user to obtain a first image.
For example, after adjusting the brightness of the color image to the target brightness to obtain the target image, the electronic device may further display the target image, so that the user can adjust the brightness of the target image. For example, when the user thinks that the brightness of a certain area of the target image is brighter or darker, the user can select the area, and the electronic device receives the selection operation of the user. Then, the electronic device may determine an adjustment region in the target image according to the selection operation, i.e., determine the region as the adjustment region. Then, the user can select a brightness, and the electronic device can obtain the brightness selected by the user. Finally, the electronic device can adjust the adjusting area to the brightness selected by the user to obtain the first image.
It should be noted that the user may select all the regions of the target image, so that the electronic device determines all the regions of the target image as the adjustment regions, the user may also select only a partial region of the target image, so that the electronic device determines the partial region of the target image as the adjustment region, and the user may also select only a single pixel of the target image, so that the electronic device determines the region corresponding to the single pixel as the adjustment region.
In some embodiments, when the electronic device proceeds to flow 202, the electronic device can perform determining a difference between the brightness of the color image and the brightness of the black and white image; based on the difference, the process of determining the target brightness skips the processes 203 and 204, and then directly executes the process 205.
For example, after determining the brightness of a color image and the brightness of a black-and-white image, the electronic device may determine the difference between the brightness of the color image and the brightness of the black-and-white image. The electronic device may then determine the target brightness based on the difference.
For example, the target brightness may be close to the brightness of the black-and-white image when the difference is large, the target brightness may be close to the brightness of the color image or the brightness of the black-and-white image when the difference is small, or the target brightness may be an average value of the brightness of the color image and the brightness of the black-and-white image.
For another example, the electronic device may set in advance a correspondence relationship between the difference value and the target luminance. Wherein the target brightness is larger than the brightness of the color image. After determining the difference, the electronic device may determine the target brightness corresponding to the difference according to the corresponding relationship.
In other embodiments, after determining the brightness of the color image and the brightness of the black-and-white image, the electronic device may determine an adjustment range according to a difference between the brightness of the color image and the brightness of the black-and-white image, and adjust the brightness of the color image according to the adjustment range to obtain the target image. Determining the target brightness according to the brightness of the color image and the brightness of the black and white image; adjusting the brightness of the color image to a target brightness to obtain a target image, which may be: and determining an adjustment amplitude according to the brightness of the color image and the brightness of the black-and-white image, and adjusting the brightness of the color image according to the adjustment amplitude to obtain a target image. Wherein, the electronic device may determine a correspondence between the difference and the adjustment magnitude. After determining the difference, the electronic device may determine the adjustment range according to the corresponding relationship. Wherein, the larger the difference value, the larger the adjustment amplitude.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an image processing apparatus according to an embodiment of the present disclosure. The image processing apparatus is applicable to an electronic device including a color camera and a black-and-white camera. The image processing apparatus includes: an obtaining module 301, a first determining module 302, a second determining module 303 and an adjusting module 304.
The acquiring module 301 is configured to acquire images of a shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image.
The first determining module 302 is used for determining the brightness of the color image and the brightness of the black-and-white image.
A second determining module 303, configured to determine the target brightness according to the brightness of the color image and the brightness of the black-and-white image.
And the adjusting module 304 is configured to adjust the brightness of the color image to the target brightness to obtain a target image.
In some embodiments, the second determining module 303 may be configured to: determining a comparison result of the brightness of the color image with a preset dark threshold value and a preset bright threshold value; and determining the target brightness according to the comparison result, the brightness of the color image and the brightness of the black-and-white image.
In some embodiments, the second determining module 303 may be configured to: if the comparison result is that the brightness of the color image is smaller than or equal to a preset dark threshold, multiplying the brightness of the color image by a first weight value to obtain a first brightness, and multiplying the brightness of the black-and-white image by a second weight value to obtain a second brightness, wherein the first weight value is smaller than the second weight value; and adding the first brightness and the second brightness to obtain target brightness.
In some embodiments, the second determining module 303 may be configured to: if the comparison result is that the brightness of the color image is greater than or equal to a preset brightness threshold value, multiplying the brightness of the color image by a third weight value to obtain a third brightness, and multiplying the brightness of the black-and-white image by a fourth weight value to obtain a fourth brightness, wherein the third weight value is greater than the fourth weight value; and adding the third brightness and the fourth brightness to obtain target brightness.
In some embodiments, the second determining module 303 may be configured to: and if the comparison result is that the brightness of the color image is greater than a preset dark threshold and less than a preset bright threshold, calculating the average value of the brightness of the color image and the brightness of the black-and-white image to obtain the target brightness.
In some embodiments, the second determining module 303 may be configured to: determining a difference between the brightness of the color image and the brightness of the black-and-white image; and determining the target brightness according to the difference value.
In some embodiments, the adjusting module 303 may be configured to: displaying the target image; receiving selection operation of a user; determining an adjusting area in the target image according to the selection operation; acquiring brightness selected by a user; and adjusting the brightness of the adjusting area to the brightness selected by the user to obtain a first image.
The present embodiment provides a computer-readable storage medium, on which a computer program is stored, which, when executed on a computer, causes the computer to execute the flow in the image processing method provided by this embodiment.
The embodiment of the present application further provides an electronic device, which includes a memory and a processor, where the processor is configured to execute the flow in the image processing method provided in this embodiment by calling the computer program stored in the memory.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a camera disposed in an electronic device according to an embodiment of the present disclosure.
The first camera 403 may be used as a main camera of the electronic device 400, and is mainly used for taking pictures, such as an RGB image capturing camera (i.e., a color camera) for the first camera 403. The second camera 408 may be a blurring camera of the electronic device 400, which may perform blurring processing, or blurring processing, on the content in the image captured by the first camera 403, and the pixels of the second camera 408 may be lower than those of the first camera 403. The third camera 409 may be a close-range camera of the electronic device 400, which is used to take images at a close range, and pixels of the third camera 409 may be lower than pixels of the first camera 403. The fourth camera 404 may be a MONO image acquisition camera (i.e., a black and white camera) of the electronic device 400, which may increase the brightness of the captured content of the main camera 403. It should be noted that the functions of the third camera 408 and the second camera 409 may be interchanged.
For example, the electronic device may be a mobile terminal such as a tablet computer or a smart phone. Referring to fig. 7, fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
The electronic device 400 may include a memory 401, a processor 402, a color camera 403, a black and white camera 404, and the like. Those skilled in the art will appreciate that the electronic device configuration shown in fig. 7 does not constitute a limitation of the electronic device and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
The memory 401 may be used to store applications and data. The memory 401 stores applications containing executable code. The application programs may constitute various functional modules. The processor 402 executes various functional applications and data processing by running an application program stored in the memory 401.
The processor 402 is a control center of the electronic device, connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing an application program stored in the memory 401 and calling data stored in the memory 401, thereby integrally monitoring the electronic device.
The color camera 403 may be used to acquire RGB images (i.e., color images).
The black and white camera 404 may be used to acquire a MONO image (i.e., a black and white image).
In this embodiment, the processor 402 in the electronic device loads the executable code corresponding to the processes of one or more application programs into the memory 401 according to the following instructions, and the processor 402 runs the application programs stored in the memory 401, so as to implement the following processes:
acquiring images of a shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image;
determining the brightness of the color image and the brightness of the black and white image;
determining target brightness according to the brightness of the color image and the brightness of the black-and-white image;
and adjusting the brightness of the color image to the target brightness to obtain a target image.
Referring to fig. 8, the electronic device 400 may include a memory 401, a processor 402, a color camera 403, a black and white camera 404, a display screen 405, an input unit 406, an output unit 407, and the like.
The memory 401 may be used to store applications and data. The memory 401 stores applications containing executable code. The application programs may constitute various functional modules. The processor 402 executes various functional applications and data processing by running an application program stored in the memory 401.
The processor 402 is a control center of the electronic device, connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing an application program stored in the memory 401 and calling data stored in the memory 401, thereby integrally monitoring the electronic device.
The color camera 403 may be used to acquire RGB images (i.e., color images).
The black and white camera 404 may be used to acquire a MONO image (i.e., a black and white image).
The display screen 405 may be used to display text, pictures, etc.
The input unit 406 may be used to receive input numbers, character information, or user characteristic information, such as a fingerprint, and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control.
The output unit 407 may be used to display information input by or provided to a user and various graphical user interfaces of the electronic device, which may be made up of graphics, text, icons, video, and any combination thereof. The output unit may include a display panel.
In this embodiment, the processor 402 in the electronic device loads the executable code corresponding to the processes of one or more application programs into the memory 401 according to the following instructions, and the processor 402 runs the application programs stored in the memory 401, so as to implement the following processes:
acquiring images of a shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image;
determining the brightness of the color image and the brightness of the black and white image;
determining target brightness according to the brightness of the color image and the brightness of the black-and-white image;
and adjusting the brightness of the color image to the target brightness to obtain a target image.
In some embodiments, when the processor 402 determines the target brightness according to the brightness of the color image and the brightness of the black-and-white image, the following steps may be performed: determining a comparison result of the brightness of the color image with a preset dark threshold value and a preset bright threshold value; and determining the target brightness according to the comparison result, the brightness of the color image and the brightness of the black-and-white image.
In some embodiments, when the processor 402 determines the target brightness according to the comparison result, the brightness of the color image and the brightness of the black-and-white image, the following steps may be performed: if the comparison result is that the brightness of the color image is smaller than or equal to a preset dark threshold, multiplying the brightness of the color image by a first weight value to obtain a first brightness, and multiplying the brightness of the black-and-white image by a second weight value to obtain a second brightness, wherein the first weight value is smaller than the second weight value; and adding the first brightness and the second brightness to obtain target brightness.
In some embodiments, when the processor 402 determines the target brightness according to the comparison result, the brightness of the color image and the brightness of the black-and-white image, the following steps may be performed: if the comparison result is that the brightness of the color image is greater than or equal to a preset brightness threshold value, multiplying the brightness of the color image by a third weight value to obtain a third brightness, and multiplying the brightness of the black-and-white image by a fourth weight value to obtain a fourth brightness, wherein the third weight value is greater than the fourth weight value; and adding the third brightness and the fourth brightness to obtain target brightness.
In some embodiments, when the processor 402 determines the target brightness according to the comparison result, the brightness of the color image and the brightness of the black-and-white image, the following steps may be performed: and if the comparison result is that the brightness of the color image is greater than a preset dark threshold and less than a preset bright threshold, calculating the average value of the brightness of the color image and the brightness of the black-and-white image to obtain the target brightness.
In some embodiments, when the processor 402 determines the target brightness according to the brightness of the color image and the brightness of the black-and-white image, the following steps may be performed: determining a difference between the brightness of the color image and the brightness of the black-and-white image; and determining the target brightness according to the difference value.
In some embodiments, after processor 402 performs adjusting the brightness of the color image to the target brightness to obtain the target image, it may further perform: displaying the target image; receiving selection operation of a user; determining an adjusting area in the target image according to the selection operation; acquiring brightness selected by a user; and adjusting the brightness of the adjusting area to the brightness selected by the user to obtain a first image.
In the above embodiments, the descriptions of the embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed description of the image processing method, and are not described herein again.
The image processing apparatus provided in the embodiment of the present application and the image processing method in the above embodiment belong to the same concept, and any method provided in the embodiment of the image processing method may be run on the image processing apparatus, and a specific implementation process thereof is described in the embodiment of the image processing method in detail, and is not described herein again.
It should be noted that, for the image processing method described in the embodiment of the present application, it can be understood by those skilled in the art that all or part of the process of implementing the image processing method described in the embodiment of the present application can be completed by controlling the relevant hardware through a computer program, where the computer program can be stored in a computer-readable storage medium, such as a memory, and executed by at least one processor, and during the execution, the process of the embodiment of the image processing method can be included. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a Random Access Memory (RAM), or the like.
In the image processing apparatus according to the embodiment of the present application, each functional module may be integrated into one processing chip, each module may exist alone physically, or two or more modules may be integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, or the like.
The foregoing detailed description has provided an image processing method, an image processing apparatus, a storage medium, and an electronic device according to embodiments of the present application, and specific examples are applied herein to explain the principles and implementations of the present application, and the descriptions of the foregoing embodiments are only used to help understand the method and the core ideas of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. An image processing method is applied to electronic equipment, wherein the electronic equipment comprises a color camera and a black and white camera, and the method is characterized by comprising the following steps of:
acquiring images of a shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image;
determining the brightness of a color image, and the brightness of a black-and-white image, comprising: dividing the color image into a plurality of color areas, determining the brightness of each color area, determining an area with the brightness larger than or equal to a preset bright threshold value in the plurality of color areas as a first area, determining an area with the brightness smaller than or equal to a preset dark threshold value in the plurality of color areas as a second area, determining an area with the brightness smaller than the preset bright threshold value and larger than the preset dark threshold value in the plurality of color areas as a third area, dividing the black-and-white image into a plurality of black-and-white areas, determining a fourth area corresponding to the first area, a fifth area corresponding to the second area and a sixth area corresponding to the third area from the plurality of black-and-white areas, and determining the brightness of the fourth area, the fifth area and the sixth area;
determining a target brightness according to the brightness of the color image and the brightness of the black-and-white image, comprising: multiplying the brightness of the first area by a seventh weight value to obtain a seventh brightness, multiplying the brightness of the fourth area by an eighth weight value to obtain an eighth brightness, wherein the seventh weight value is greater than the eighth weight value, multiplying the brightness of the second area by the eighth weight value to obtain a ninth brightness, multiplying the brightness of the fifth area by the seventh weight value to obtain a tenth brightness, adding the seventh brightness and the eighth brightness to obtain a target brightness of the first area, adding the ninth brightness and the tenth brightness to obtain a target brightness of the second area, and calculating an average value of the brightness of the third area and the brightness of the sixth area to obtain a target brightness of the third area;
adjusting the brightness of the color image to the target brightness to obtain a target image, including: and adjusting the brightness of the first area to the target brightness of the first area, adjusting the brightness of the second area to the target brightness of the second area, and adjusting the brightness of the third area to the target brightness of the third area to obtain a target image.
2. The method according to claim 1, wherein determining a target brightness from the brightness of the color image and the brightness of the black-and-white image comprises:
determining a comparison result of the brightness of the color image with a preset dark threshold value and a preset bright threshold value;
and determining the target brightness according to the comparison result, the brightness of the color image and the brightness of the black-and-white image.
3. The image processing method according to claim 2, wherein said determining a target brightness based on the comparison result, the brightness of the color image, and the brightness of the black-and-white image comprises:
if the comparison result is that the brightness of the color image is smaller than or equal to a preset dark threshold, multiplying the brightness of the color image by a first weight value to obtain a first brightness, and multiplying the brightness of the black-and-white image by a second weight value to obtain a second brightness, wherein the first weight value is smaller than the second weight value;
and adding the first brightness and the second brightness to obtain target brightness.
4. The image processing method according to claim 2, wherein said determining a target brightness based on the comparison result, the brightness of the color image, and the brightness of the black-and-white image comprises:
if the comparison result is that the brightness of the color image is greater than or equal to a preset brightness threshold value, multiplying the brightness of the color image by a third weight value to obtain a third brightness, and multiplying the brightness of the black-and-white image by a fourth weight value to obtain a fourth brightness, wherein the third weight value is greater than the fourth weight value;
and adding the third brightness and the fourth brightness to obtain target brightness.
5. The image processing method according to claim 2, wherein said determining a target brightness based on the comparison result, the brightness of the color image, and the brightness of the black-and-white image comprises:
and if the comparison result is that the brightness of the color image is greater than a preset dark threshold and less than a preset bright threshold, calculating the average value of the brightness of the color image and the brightness of the black-and-white image to obtain the target brightness.
6. The method according to claim 1, wherein determining a target brightness from the brightness of the color image and the brightness of the black-and-white image comprises:
determining a difference between the brightness of the color image and the brightness of the black-and-white image;
and determining the target brightness according to the difference value.
7. The image processing method according to any one of claims 1 to 6, further comprising, after the adjusting the brightness of the color image to the target brightness to obtain a target image:
displaying the target image;
receiving selection operation of a user;
determining an adjusting area in the target image according to the selection operation;
acquiring brightness selected by a user;
and adjusting the brightness of the adjusting area to the brightness selected by the user to obtain a first image.
8. An image processing apparatus applied to an electronic device including a color camera and a black-and-white camera, comprising:
the acquisition module is used for acquiring images of a shooting scene through the color camera and the black-and-white camera to obtain a color image and a black-and-white image;
a first determining module for determining the brightness of a color image and the brightness of a black-and-white image, comprising: dividing the color image into a plurality of color areas, determining the brightness of each color area, determining an area with the brightness larger than or equal to a preset bright threshold value in the plurality of color areas as a first area, determining an area with the brightness smaller than or equal to a preset dark threshold value in the plurality of color areas as a second area, determining an area with the brightness smaller than the preset bright threshold value and larger than the preset dark threshold value in the plurality of color areas as a third area, dividing the black-and-white image into a plurality of black-and-white areas, determining a fourth area corresponding to the first area, a fifth area corresponding to the second area and a sixth area corresponding to the third area from the plurality of black-and-white areas, and determining the brightness of the fourth area, the fifth area and the sixth area;
a second determining module, configured to determine a target brightness according to the brightness of the color image and the brightness of the black-and-white image, including: multiplying the brightness of the first area by a seventh weight value to obtain a seventh brightness, multiplying the brightness of the fourth area by an eighth weight value to obtain an eighth brightness, wherein the seventh weight value is greater than the eighth weight value, multiplying the brightness of the second area by the eighth weight value to obtain a ninth brightness, multiplying the brightness of the fifth area by the seventh weight value to obtain a tenth brightness, adding the seventh brightness and the eighth brightness to obtain a target brightness of the first area, adding the ninth brightness and the tenth brightness to obtain a target brightness of the second area, and calculating an average value of the brightness of the third area and the brightness of the sixth area to obtain a target brightness of the third area;
the adjusting module is used for adjusting the brightness of the color image to the target brightness to obtain a target image, and comprises: and adjusting the brightness of the first area to the target brightness of the first area, adjusting the brightness of the second area to the target brightness of the second area, and adjusting the brightness of the third area to the target brightness of the third area to obtain a target image.
9. A storage medium having stored therein a computer program which, when run on a computer, causes the computer to execute the image processing method according to any one of claims 1 to 7.
10. An electronic device, characterized in that the electronic device comprises a processor and a memory, wherein the memory stores a computer program, and the processor is used for executing the image processing method according to any one of claims 1 to 7 by calling the computer program stored in the memory.
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| CN106484257A (en) * | 2016-09-22 | 2017-03-08 | 广东欧珀移动通信有限公司 | Camera control method, device and electronic equipment |
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