CN107911674B - Image white balance adjusting method and device, electronic equipment and computer readable storage medium - Google Patents
Image white balance adjusting method and device, electronic equipment and computer readable storage medium Download PDFInfo
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Abstract
The application relates to an image white balance adjusting method and device, electronic equipment and a computer readable storage medium, wherein an instruction of a shot image is received in a first preset time period, the shot image is subjected to white balance processing according to a preset white balance mode in response to the instruction, an image after the white balance processing is generated, and the image after the white balance processing is displayed. The preset white balance mode is a white balance mode obtained by screening according to the image after white balance processing in a second preset time period, and the second preset time period is before the first preset time period. And selecting a white balance mode obtained by screening from the image subjected to the white balance processing according to the user in the second preset time period as a preset white balance mode, and then performing white balance processing on the image shot in the first time period after the second preset time period by adopting the preset white balance mode, so that a more accurate white balance adjusting effect can be realized under the condition that some ambient light is more complicated.
Description
Technical Field
The present application relates to the field of image processing technologies, and in particular, to an image white balance adjustment method and apparatus, an electronic device, and a computer-readable storage medium.
Background
Many people have problems when using electronic devices to take pictures: the image shot in the room of the fluorescent lamp appears green, the scenery shot under the indoor tungsten lamp light is yellowish, and the picture shot in the sunlight shadow is wonderfully bluish, which is caused by the white balance setting. White balance is an important technology for electronic devices to take pictures and is critical to the color appearance of the pictures taken. White balance is a very abstract concept, and the most popular understanding is to make the white image still white, and if white is white, the image of other scenes will approach the color vision habit of human eyes. The process of adjusting the white balance of an image is called image white balance adjustment.
Disclosure of Invention
The embodiment of the application provides an image white balance adjustment method and device, electronic equipment and a computer readable storage medium, which can improve the accuracy of white balance adjustment of an image.
An image white balance adjustment method, comprising:
receiving an instruction of shooting an image in a first preset time period;
responding to the instruction and carrying out white balance processing on the shot image according to a preset white balance mode to generate an image after the white balance processing, wherein the preset white balance mode is a white balance mode obtained by screening according to the image after the white balance processing in a second preset time period, and the second preset time period is before the first preset time period;
and displaying the image after the white balance processing.
An image white balance adjustment apparatus, the apparatus comprising:
the image shooting instruction receiving module is used for receiving an image shooting instruction in a first preset time period;
a white balance processing module, configured to perform white balance processing on the captured image according to a preset white balance mode in response to the instruction, and generate an image after the white balance processing, where the preset white balance mode is a white balance mode obtained by screening according to the image after the white balance processing within a second preset time period, and the second preset time period is before the first preset time period;
and the image display module is used for displaying the image after the white balance processing.
An electronic device comprising a memory and a processor, the memory having stored therein computer readable instructions, which, when executed by the processor, cause the processor to perform the steps of the image white balance adjustment method as described above.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the image white balance adjustment method as described above.
According to the image white balance adjusting method and device, the electronic equipment and the computer readable storage medium, the command of the shot image is received in the first preset time period, the shot image is subjected to white balance processing according to the preset white balance mode in response to the command, the image after the white balance processing is generated, and the image after the white balance processing is displayed. The preset white balance mode is a white balance mode obtained by screening according to the image after white balance processing in a second preset time period, and the second preset time period is before the first preset time period. According to the method, a white balance mode obtained by screening from an image subjected to white balance processing according to a user in a second preset time period is used as a preset white balance mode, then the preset white balance mode is adopted to carry out white balance processing on the image shot in a first time period after the second preset time period, so that the selection rule of the white balance mode of the user can be learned and applied under the conditions that some environment light is complex and the white balance mode adjustment effect automatically recommended by electronic equipment is not very accurate, and the accurate white balance adjustment effect is realized.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram illustrating an exemplary embodiment of a method for adjusting white balance of an image;
FIG. 2 is a block diagram showing a partial configuration of an electronic apparatus in one embodiment;
FIG. 3 is a flow chart of a method for adjusting white balance of an image according to an embodiment;
FIG. 4 is a flowchart of an image white balance adjustment method in yet another embodiment;
FIG. 5 is a diagram illustrating a multi-frame image after white balance processing in the form of a thumbnail displayed on a display screen in one embodiment;
FIG. 6 is a schematic diagram of an embodiment of an apparatus for adjusting white balance of an image;
FIG. 7 is a schematic diagram of an image white balance adjustment apparatus according to another embodiment
FIG. 8 is a schematic diagram of a photographing circuit in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first client may be referred to as a second client, and similarly, a second client may be referred to as a first client, without departing from the scope of the present application. Both the first client and the second client are clients, but they are not the same client.
Fig. 1 is a schematic diagram of an application environment of the image white balance adjustment method in an embodiment. As shown in fig. 1, the electronic device 10 may capture a captured image of the subject 20 by the camera 102. The camera 102 may include a first camera and a second camera. The electronic device 10 receives an instruction to shoot an image in a first preset time period, responds to the instruction, performs white balance processing on the shot image according to a preset white balance mode, generates an image after the white balance processing, and displays the image after the white balance processing. The preset white balance mode is a white balance mode obtained by screening according to the image after white balance processing in a second preset time period, and the second preset time period is before the first preset time period.
Fig. 2 is a schematic diagram of an internal structure of an electronic device in one embodiment. As shown in fig. 2, the electronic device includes a processor, a memory, and a network interface connected by a system bus. Wherein, the processor is used for providing calculation and control capability and supporting the operation of the whole electronic equipment. The memory is used for storing data, programs and the like, and the memory stores at least one computer program which can be executed by the processor to realize the image white balance adjusting method suitable for the electronic device provided in the embodiment of the application. The Memory may include a non-volatile storage medium such as a magnetic disk, an optical disk, a Read-Only Memory (ROM), or a Random-Access-Memory (RAM). For example, in one embodiment, the memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The computer program can be executed by a processor to implement an image white balance adjustment method provided in the following embodiments. The internal memory provides a cached execution environment for the operating system computer programs in the non-volatile storage medium. The network interface may be an ethernet card or a wireless network card, etc. for communicating with an external electronic device. The electronic device may be a mobile phone, a tablet computer, or a personal digital assistant or a wearable device, etc.
In one embodiment, as shown in fig. 3, an image white balance adjustment method is provided, which is described by taking the method as an example applied to the electronic device in fig. 2, and includes:
The first preset time period is a time period preset in the electronic device, and the electronic device performs white balance processing on the shot image according to a preset white balance mode within the first preset time period to generate an image after the white balance processing.
The image shooting instruction may be a shooting instruction triggered by a detected related touch operation, a pressing operation of a physical key, a voice control operation, or the like. The touch operation may be a touch click operation, a touch long press operation, a touch slide operation, a multi-point touch operation, and the like. The electronic device can provide a shooting button for triggering shooting, and when the clicking operation of the button is detected, an instruction for shooting the image is triggered. The electronic equipment can also preset shooting voice information used for triggering the shooting instruction. The voice receiving device is called to receive corresponding voice information, and the voice information is analyzed to trigger the image shooting instruction when the voice information is matched with the shooting voice information. Within a first preset time period, the electronic equipment receives an instruction for shooting an image.
And 304, responding to the instruction and performing white balance processing on the shot image according to a preset white balance mode to generate an image after the white balance processing, wherein the preset white balance mode is a white balance mode obtained by screening according to the image after the white balance processing in a second preset time period, and the second preset time period is before the first preset time period.
And in a first preset time period, the electronic equipment receives an instruction of shooting an image, responds to the instruction and carries out white balance processing on the shot image according to a preset white balance mode to generate an image after the white balance processing. The preset white balance mode is that the user shoots an image within a second preset time period. The electronic equipment respectively performs white balance processing on each image shot in real time according to a plurality of different white balance modes, so that a multi-frame white balance processed image is obtained for one shot image. The user screens out one image from the multi-frame white balance processed images corresponding to one shot image according to personal preference, the image is used as a target image to be stored, and other multi-frame white balance processed images can be deleted. The white balance effect of the target image is more satisfactory and favored by the user. And the user carries out the screening operation on each shot image in real time within a second preset time, and stores the target image corresponding to each image. And counting which white balance mode is adopted by the target image screened and stored by the user in the second preset time period, and further calculating the probability of each white balance mode appearing in the target image. And acquiring a white balance mode with the highest occurrence probability as a preset white balance mode, wherein the preset white balance mode is the white balance mode which is used by the user most in the current second preset time period, so that the user can be estimated to favor the image processed by the white balance mode most in the scene of the current second preset time period. It may also be that the effect after the image is processed by using the white balance mode in the current scene of the second preset time period is better. Therefore, after the second preset time period is over, the white balance mode with the highest occurrence probability is used as the preset white balance mode according to the selection rule of the user for the white balance mode in the second preset time period, and the current default white balance mode in the first preset time period.
And performing white balance processing on the shot image according to a preset white balance mode in a first time period to generate a white-balance-processed image.
The white balance processing process of the image comprises the following steps: the shot image is composed of a plurality of pixel points, each pixel point can be composed of a plurality of color channels, and each color channel represents a color component. For example, the image may be composed of three channels of RGB (three colors of red, green, and blue), HSV (hue, saturation, and lightness), and CMY (three colors of cyan, magenta, or magenta, and yellow). For each color channel on each pixel point, the electronic device can correct the color value of the corresponding color channel according to the corresponding white balance data of the white balance mode. Therefore, white balance processing of the image is realized, and the corrected color value can reflect the real color of the corresponding shot object.
The second preset time period may precede the first preset time period by interpreting that the end time of the second preset time period is directly adjacent to the start time of the first preset time period. It is of course also possible to interpret that the end of the second predetermined time interval is spaced apart by a certain time interval from the start of the first predetermined time interval, and not directly adjacent. And step 306, displaying the image after the white balance processing.
And displaying an image generated by carrying out real-time white balance processing on the shot image according to a preset white balance mode on a display screen of the electronic equipment, and storing the displayed image.
In this embodiment, a white balance mode obtained by a user through screening from an image subjected to white balance processing within a second preset time period is used as a preset white balance mode, and then the preset white balance mode is adopted to perform white balance processing on an image shot in a first time period after the second preset time period, so that under the conditions that some ambient lights are complicated and the white balance mode adjustment effect automatically recommended by electronic equipment is not very accurate, the selection rule of the white balance mode of the user is learned and applied, and thus the more accurate white balance adjustment effect is realized.
In one embodiment, as shown in fig. 4, before the operation of receiving the captured image within the first preset time period, the method includes:
and 402, receiving the shot first original image in a second preset time period.
The second preset time period is prior to the first preset time period, e.g., at 12 pm on a certain day: 00-12:10, the user is using the electronic device to take an image, assuming that the second preset time period may be 12: 00-12:10, and since the second predetermined time period precedes the first predetermined time period, the first predetermined time period may be the 12: 11-12:21. And receiving shooting within a second preset time period to obtain a first original image. For example, it may be 12: and 00-12:10, receiving an image obtained by shooting by a user as a first original image.
And step 404, respectively performing white balance processing on the first original image according to the multiple white balance modes to generate a multi-frame image after the white balance processing.
And respectively carrying out white balance processing on the first original image according to a plurality of different white balance modes to generate a multi-frame image after the white balance processing. Specifically, the plurality of different white balance modes are modes having different white balance parameters. For example, the various white balance modes include candle mode, incandescent mode, daylight mode, fluorescent mode, cloudy mode, warm fluorescent mode, dim mode, shadow mode, and the like. The candle mode is a mode which is automatically applicable to photographing in a scene with light provided by a candle, the incandescent light mode is a mode which is automatically applicable to photographing in a scene with light provided by an incandescent lamp, and the analogy is carried out on the white balance modes. In general, the color temperature of a candle is about 1800K, the color temperature of an incandescent lamp is about 3000K, the color temperature of a clear day is about 5200K, the color temperature of direct sunlight is about 5000K, the color temperature of a cloudy day is about 6500-9000K, the color temperature of a blue day is about 9000K-20000K, and K refers to Kelvin temperature. The color temperature is a unit of measure representing the color component contained in the light. Generally, the higher the color temperature value is, the more red the photographed image appears, and conversely, the lower the color temperature value is, the more blue the photographed image appears. The white balance processing is to adjust the color white balance of the shot image to a reasonable range by adjusting the color temperature value of the shot image so as to prevent the shot picture from color cast. For example, after a first original image is processed in a daylight mode, an incandescent lamp mode, a cloudy mode and a shadow mode, which have relatively close color temperature values, 4 kinds of white-balanced multi-frame images are generated for the same first original image, which are processed in the daylight mode, the incandescent lamp mode, the cloudy mode and the shadow mode, respectively.
And step 406, receiving and storing a target image selected by the user from the multi-frame image after the white balance processing according to personal preference.
And screening out an image as a target image corresponding to each first original image according to personal preference from the white-balance-processed multi-frame image corresponding to each first original image by a user, and storing the image. Specifically, the user sequentially browses the images of the currently shot first original image with different white balance effects, and screens out the image which is considered by the user to be more accurate in white balance effect adjustment and serves as a target image to be stored according to personal judgment or preference from the images. And then, processing the next image shot by the user in different white balance modes to obtain images with different white balance effects, and screening out the image which is considered by the user to be more accurate in white balance effect adjustment as a target image for storage by the user according to personal judgment or preference. This is done for each captured image during a second preset time period. And obtaining a target image for each image and storing the target image.
And step 408, counting the occurrence probability of the white balance mode corresponding to the target image.
And counting the white balance modes of all the target images within a second preset time period, and counting the occurrence probability of each white balance mode in the target images. For example, at noon on a day for a second preset period of time 12: in a ratio of 00-12:10, a total of 20 target images are obtained. The probability of occurrence of the sunlight mode, the probability of occurrence of the cloudy mode and the probability of occurrence of the shadow mode in the white balance mode of 20 target images are counted to be 80%, 10% and 10%.
And acquiring the white balance mode with the highest occurrence probability from the occurrence probabilities of each white balance mode counted from the target image. The white balance pattern is taken as a preset white balance pattern in a first preset time period. The first preset time period is a time period after the second preset time period, for example, the second preset time period may be 12 pm: 00-12:10, the first preset time period is 12: 11-12:21.
In the embodiment of the application, the shot images are processed according to various different white balance modes, and multi-frame images with different white balance effects are obtained after processing for selection of a user. And the user manually screens out the target image according to personal preference and stores the target image. Different requirements of different users on the white balance effect are met, and errors generated when the electronic equipment automatically carries out white balance processing can be corrected. And selecting the target image after all the shot images in the second preset time period are processed. And counting a white balance mode with the highest occurrence probability in a first preset time period, and taking the white balance mode as a preset white balance mode in the first preset time period. Therefore, the white balance mode with high probability screened by the user manually can be applied to the next adjacent time period. The method avoids the situation that the user needs to manually screen the target image every time, and can meet personal preferences of the user.
In one embodiment, the end time of the second preset time period is adjacent to the start time of the first preset time period.
Specifically, the second preset time period and the first preset time period are adjacent time periods. For example, at noon 12: 00-12:10, when the user is using the electronic device to capture an image, the second preset time period may be defined as 12 a/m: 00-12:10, since the first predetermined time period is after the second predetermined time period, the first predetermined time period may be the 12: 11-12:21. Of course, the duration of the second preset time period and the duration of the first preset time period may be set according to whether the scene shot by the user and the ambient light information are greatly changed. For example, assuming that the shooting scene and the ambient light information of the user do not change greatly at 12:21 pm, the first preset time period may be extended to 12: 30 or more, as long as the shooting scene and the ambient light information of the user are not changed greatly within the time period. Of course, the starting time of the second preset time period may also be extended forward, for example, the starting time of the second preset time period may be increased from 12 pm: 00 extends forward to 11:50 pm as long as the user's scene and ambient light information does not change significantly over the extended forward period of time.
In this embodiment, when a complex shooting scene is faced, the image processed by the electronic device in the automatic white balance mode may have a certain difference from the white balance effect desired by the user. At this time, the electronic device may learn a white balance mode selection rule of the user, where the first preset time period is a time period immediately after the second preset time period, in the two continuous time periods, the shooting scene and the ambient light information where the user is located are generally similar, and the user may select the white balance mode under the similar shooting scene and ambient light information. Therefore, the white balance mode screened by the user in the previous time period according to personal preference is applied to the next adjacent time period, so that the times of manually adjusting the white balance by the user can be reduced, and meanwhile, the image subjected to automatic white balance processing can meet the requirements of the user.
In one embodiment, the second preset time period and the first preset time period are the same time period in adjacent preset periods.
Specifically, the preset period may be a one-day period, and the second preset time period and the first preset time period are the same time period in adjacent preset periods. And the second preset time period is before the first preset time period, so that the second preset time period is 12:00am-1:00pm of the previous day, and the first preset time period is 12:00am-1:00pm of the current day. And processing the images shot by the 12:00am-1:00pm user on the day by applying the preset white balance mode by adopting the preset white balance mode manually screened by the 12:00am-1:00pm user on the previous day.
Specifically, the preset period may be a period of one week, and the second preset time period and the first preset time period are the same time period in adjacent preset periods. And the second preset time period is before the first preset time period, so that the second preset time period is 9:00am-10:00am of the week of the last week, and the first preset time period is 9:00am-10:00am of the week. And processing the images shot by the Monday 9:00am-10:00am of the week by applying the preset white balance mode by adopting the preset white balance mode screened by the Monday 9:00am-10:00am user of the last week.
In this embodiment, when the shooting environment is relatively complex, if the user behavior is regularly traceable, the shooting scene and the ambient light information where the user is located in a certain time period of the previous day and the same time period of the current day are generally relatively similar, so that the same white balance processing is performed on the image shot in the same time period of the current day by using the preset white balance mode manually screened by the user in the certain time period of the previous day, the obtained effect is also relatively satisfactory for the user, the number of times of manual selection by the user is reduced, and the satisfaction degree of user experience is improved.
In one embodiment, the plurality of white balance patterns include a first type white balance pattern including an incandescent light pattern, a daylight pattern, a fluorescent pattern, a cloudy pattern, a warm fluorescent pattern, a dim light pattern, and a shadow pattern, and a second type white balance pattern that is a white balance pattern combining any two or more of the first type white balance patterns.
Specifically, the first type of white balance mode is a preset white balance mode in the electronic device, and generally includes an incandescent light mode, a daylight mode, a fluorescent mode, a cloudy mode, a warm fluorescent mode, a dim light mode, a shadow mode, and the like, and of course, other white balance modes preset in the electronic device are also included, and names of the white balance modes in different electronic devices are also deviated. Each white balance mode corresponds to a set of white balance parameters.
Specifically, when the shooting environment is complicated, for example, a part of the shooting scene is in the sunlight and a part of the shooting scene is in the shadow, then the image shot in the shooting scene and having two scenes simultaneously is subjected to white balance processing in the sunlight mode, and the color restoration of the sunlight irradiation part in the obtained image is accurate, but the shadow part is blue, so that the shadow part appears dark. If the shadow mode is adopted for processing, the sunlight irradiation part in the obtained image is yellow, and the color restoration of the shadow part is accurate. Therefore, if a user wants to obtain a satisfactory image, a new mode after the white balance parameters of the daylight mode and the shadow mode are averaged can be preset on the electronic device as the second type of white balance mode. By performing the white balance processing on the image with the two scenes of the sunlight and the shadow through the second type white balance mode, the white balance effect of the obtained image is closer to a natural point than the white balance effect of the image processed through the sunlight mode or the shadow mode.
In the embodiment, the preset white balance mode in the electronic equipment is added and perfected, the white balance effect obtained after the electronic equipment processes the image is enriched, and more accurate selections are provided for users.
In one embodiment, after acquiring the white balance pattern with the highest occurrence probability and setting the white balance pattern to a preset white balance pattern within a first preset time period, the method includes:
acquiring a first original image, wherein a white balance mode of a target image corresponding to the first original image is a preset white balance mode;
identifying the ambient light information of the first original image to obtain the ambient light information of the first original image;
and matching the environment light information of the shot second original image with the environment light information of the first original image, and when the matching degree reaches a set threshold value, performing white balance processing on the second original image by adopting a preset white balance mode, and displaying the image after the white balance processing.
Specifically, the user selects the white balance mode with the highest occurrence probability from all the target images within the second preset time period, and sets the white balance mode after the default white balance mode of the first preset time period. One or more target images are obtained from all the target images, and the target images are images which are manually screened by a user and obtained after the preset white balance mode processing. And further acquiring an image which is originally shot and is not subjected to white balance processing and corresponds to the target image according to the target image, and taking the image as a first original image. Identifying ambient light information of the first original image, the parameters of the ambient light information that can be quantified including: the illumination, brightness, color temperature, and color rendering index may also include other parameters for quantifying the ambient light information.
Wherein, the illuminance refers to the intensity of illumination, refers to the luminous flux of the received visible light per unit area, and is used for indicating the intensity of the illumination and the quantity of the illumination degree of the surface area of the object, and has unit Lux or Lx. The brightness refers to the physical quantity of the surface luminescence (reflection) intensity of the luminophor (reflector), and the unit of the brightness is candela/square meter (cd/m)2) Luminance is the human perception of the intensity of light, and is a subjective quantity. The color temperature is a unit of measure representing the color component contained in the light. The color rendering capability of a light source on an object is called color rendering, and is compared with the appearance color of the object under a reference or reference light source (an incandescent lamp or a picture light) with the same color temperature. The color rendering index of sunlight is defined as 100 and the color rendering index of an incandescent lamp is approximately 97 very close to that of sunlight.
Further, after the ambient light information of the first original image is identified, the ambient light information of the first original image is recorded and stored. Specifically, specific values of the illuminance, brightness, color temperature and color rendering index of the first original image are saved. When the image shooting is performed later, the second original image obtained by shooting is matched with the ambient light information of the first original image. When the matching degree reaches the set threshold, it indicates that the ambient light information of the first original image is similar to the ambient light information of the second original image, that is, the second original image can be processed by adopting the preset white balance mode corresponding to the first original image, so that an image which is relatively satisfied by the user can be obtained. The threshold is set, and it can be defined that the matching degree of each parameter of the ambient light information reaches 80% or more. Of course, the setting threshold may be set to other values according to circumstances.
In one embodiment, receiving and saving a target image selected by a user from a plurality of frame images after white balance processing according to personal preference, comprises:
displaying the multi-frame image subjected to white balance processing on a display screen in a thumbnail mode;
receiving the click operation of a user on the thumbnail;
amplifying and displaying the thumbnail corresponding to the clicking operation so that the user can view and select the image corresponding to the thumbnail;
and receiving the image selected by the user according to personal preference as the target image and saving the target image.
Specifically, after the first original image obtained by shooting is processed in a plurality of white balance modes (for example, the plurality of white balance modes include a daylight mode, an incandescent lamp mode, a cloudy mode and a shadow mode with relatively close color temperature values), 4 types of multi-frame images after white balance processing are generated for the same first original image, namely an image a after daylight mode processing, an image B after incandescent lamp mode processing, an image C after cloudy mode processing and an image D after shadow mode processing. As shown in fig. 5, the a image, the B image, the C image, and the D image are displayed on the display screen in the form of thumbnails, respectively. And if the user clicks any one thumbnail, the clicked thumbnail is amplified to the whole display screen, so that the user can conveniently view and select the thumbnail. After the user views the images processed by the various white balance modes, the image which is considered by the user to be most suitable for the personal preference is selected from the images as the target image to be stored.
In an embodiment, an image white balance adjustment method is provided, which is described by taking the application of the method to the electronic device in fig. 2 as an example, and specifically includes:
firstly, the user uses the electronic device for a second preset time period of a certain day: at noon 12: and (5) taking a picture at a ratio of 00-12:10, and after a first original image is shot, respectively carrying out white balance processing on the image in a plurality of different white balance modes to generate a multi-frame image after the white balance processing. And the user screens out an image from the multi-frame images according to personal preference to serve as a target image corresponding to the first original image for storage. And then, continuing to shoot the next image, and screening out one image as a target image corresponding to the image according to personal preference and storing the image after carrying out the same operation on the next image.
Further, during a second preset time period, i.e., 12 at noon of a day: in a ratio of 00-12:10, a total of 20 target images are obtained. The probability of occurrence of the sunlight mode, the probability of occurrence of the cloudy mode and the probability of occurrence of the shadow mode in the white balance mode of 20 target images are counted to be 80%, 10% and 10%. It can be seen that the occurrence probability of the daylight mode is the highest, and the daylight mode is taken as the preset white balance mode in the first preset time period. The first preset time period is 12 immediately after noon on the same day: 11-12:21.
Further, during a first preset time period: noon on the same day 12: 11-12:21, when a user uses the electronic equipment to take a picture, the shot image is directly processed according to a preset white balance mode, namely a sunlight mode, and a final image after white balance processing can be obtained and displayed to the user and stored.
In one embodiment, as shown in fig. 6, there is provided an image white balance adjustment apparatus 600 including: an instruction receiving module 601 for capturing an image, a white balance processing module 602, and an image display module 603. Wherein,
the instruction receiving module 601 is used for receiving an instruction of shooting an image in a first preset time period.
The white balance processing module 602 is configured to respond to the instruction and perform white balance processing on the captured image according to a preset white balance mode to generate an image after the white balance processing, where the preset white balance mode is a white balance mode obtained by screening according to the image after the white balance processing within a second preset time period, and the second preset time period is before the first preset time period.
And an image display module 603 configured to display the white-balanced image.
In one embodiment, as shown in fig. 7, there is provided an image white balance adjustment apparatus 600, further comprising: a first original image capturing module 604, a multiple white balance mode processing module 605, a target image selecting module 606, a white balance mode occurrence probability statistics module 607, and a preset white balance mode obtaining module 608. Wherein,
and a first original image capturing module 604, configured to receive and capture the first original image within a second preset time period.
The multiple white balance mode processing module 605 is configured to perform white balance processing on the first original image according to the multiple white balance modes, respectively, and generate a multiple frame image after the white balance processing.
And a target image selection module 606, configured to receive and store a target image selected by a user according to personal preferences from the white-balanced multi-frame image.
And the white balance mode occurrence probability statistics module 607 is configured to count the occurrence probability of the white balance mode corresponding to the target image.
The preset white balance mode obtaining module 608 is configured to obtain a white balance mode with the highest occurrence probability, and set the white balance mode as a preset white balance mode in a first preset time period.
In one embodiment, the second preset time period and the first preset time period are the same time period in adjacent preset periods.
In one embodiment, the plurality of white balance modes includes incandescent light mode, daylight mode, fluorescent mode, cloudy mode, warm fluorescent mode, dim light mode, shadow mode, and a white balance mode resulting from a combination of any two or more of the above.
In one embodiment, there is provided an image white balance adjustment apparatus, further comprising:
the first original image obtaining module is used for obtaining a first original image, and the white balance mode of the target image corresponding to the first original image is a preset white balance mode.
And the ambient light information identification module is used for identifying the ambient light information of the first original image to obtain the ambient light information of the first original image.
And the environment light information matching and white balance processing module is used for matching the environment light information of the shot second original image with the environment light information of the first original image, and when the matching degree reaches a set threshold value, performing white balance processing on the second original image in a preset white balance mode, and displaying the image after the white balance processing.
In one embodiment, the target image selection module is further configured to display the white-balance-processed multi-frame image on a display screen in a thumbnail form; receiving the click operation of a user on the thumbnail; amplifying and displaying the thumbnail corresponding to the clicking operation so that the user can view and select the image corresponding to the thumbnail; and receiving the image selected by the user according to personal preference as the target image and saving the target image.
The division of each module in the image white balance adjustment device is only used for illustration, and in other embodiments, the image white balance adjustment device may be divided into different modules as needed to complete all or part of the functions of the image white balance adjustment device.
A computer program product containing instructions which, when run on a computer, cause the computer to perform the above-described image white balance adjustment method.
The embodiment of the present application provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the processor executes the computer program, the steps of the image white balance adjustment method provided in the foregoing embodiments are implemented.
The embodiment of the application also provides a computer readable storage medium. A computer program is stored thereon, and when being executed by a processor, the computer program realizes the steps of the image white balance adjustment method provided by the above embodiments.
The embodiment of the application also provides the electronic equipment. The electronic device includes a shooting circuit, which may be implemented by hardware and/or software components, and may include various Processing units defining an ISP (Image Signal Processing) pipeline. FIG. 8 is a schematic diagram of a photographing circuit in one embodiment. As shown in fig. 8, for convenience of explanation, only various aspects of the photographing technology related to the embodiments of the present application are shown.
As shown in fig. 8, the photographing circuit includes an ISP processor 840 and a control logic 850. Image data captured by imaging device 810 is first processed by ISP processor 840, and ISP processor 840 analyzes the image data to capture image statistics that may be used to determine and/or control one or more parameters of imaging device 810. Imaging device 810 may include a camera having one or more lenses 812 and an image sensor 814. Image sensor 814 may include an array of color filters (e.g., Bayer filters), and image sensor 814 may acquire light intensity and wavelength information captured with each imaging pixel of image sensor 814 and provide a set of raw image data that may be processed by ISP processor 840. The sensor 820 (e.g., a gyroscope) may provide parameters of the captured shots (e.g., anti-shake parameters) to the ISP processor 840 based on the type of sensor 820 interface. The sensor 820 interface may utilize an SMIA (Standard Mobile Imaging Architecture) interface, other serial or parallel camera interfaces, or a combination of the above.
In addition, the image sensor 814 may also send raw image data to the sensor 820, the sensor 820 may provide raw image data to the ISP processor 840 based on the sensor 820 interface type, or the sensor 820 may store raw image data in the image memory 830.
The ISP processor 840 processes the raw image data pixel by pixel in a variety of formats. For example, each image pixel may have a bit depth of 8, 10, 12, or 14 bits, and ISP processor 840 may perform one or more capture operations on the raw image data, collecting statistical information about the image data. Wherein the photographing operation may be performed with the same or different bit depth precision.
Upon receiving raw image data from image sensor 814 interface or from sensor 820 interface or from image memory 830, ISP processor 840 may perform one or more photographing operations, such as temporal filtering. The processed image data may be sent to image memory 830 for additional processing before being displayed. ISP processor 840 may also receive processed data from image memory 830 and subject the processed data to image data processing in the raw domain and in the RGB and YCbCr color spaces. The processed image data may be output to a display 880 for viewing by a user and/or further Processing by a Graphics Processing Unit (GPU). Further, the output of ISP processor 840 may also be sent to image memory 830 and display 880 may read image data from image memory 830. In one embodiment, image memory 830 may be configured to implement one or more frame buffers. Further, the output of the ISP processor 840 may be transmitted to an encoder/decoder 870 for encoding/decoding the image data. The encoded image data may be saved and decompressed before being displayed on the display 880 device.
The step of the ISP processor 840 processing the image data includes: the image data is subjected to VFE (Video Front End) Processing and CPP (Camera Post Processing). The VFE processing of the image data may include modifying the contrast or brightness of the image data, modifying digitally recorded lighting status data, performing compensation processing (e.g., white balance, automatic gain control, gamma correction, etc.) on the image data, performing filter processing on the image data, etc. CPP processing of image data may include scaling an image, providing a preview frame and a record frame to each path. Among other things, the CPP may use different codecs to process the preview and record frames. The image data processed by ISP processor 840 may be sent to beauty module 860 for beauty processing of the image before being displayed. The beautifying module 860 may perform beautifying processing on the image data, including: whitening, removing freckles, buffing, thinning face, removing acnes, enlarging eyes and the like. The beautifying module 860 may be a Central Processing Unit (CPU), a GPU, a coprocessor, or the like. The data processed by the beauty module 860 may be transmitted to the encoder/decoder 870 so as to encode/decode image data. The encoded image data may be saved and decompressed before being displayed on the display 880 device. The beauty module 860 may also be located between the encoder/decoder 870 and the display 880, i.e., the beauty module performs beauty processing on the imaged image. The encoder/decoder 870 may be a CPU, GPU, coprocessor, or the like in the mobile terminal.
The statistics determined by ISP processor 840 may be sent to control logic 850 unit. For example, the statistical data may include image sensor 814 statistical information such as auto-exposure, auto-white balance, auto-focus, flicker detection, black level compensation, lens 812 shading correction, and the like. Control logic 850 may include a processor and/or microcontroller that executes one or more routines (e.g., firmware) that may determine control parameters of imaging device 810 and ISP processor 840 based on the received statistical data. For example, the control parameters of imaging device 810 may include sensor 820 control parameters (e.g., gain, integration time for exposure control), camera flash control parameters, lens 812 control parameters (e.g., focal length for focusing or zooming), or a combination of these parameters. The ISP control parameters may include gain levels and color correction matrices for automatic white balance and color adjustment (e.g., during RGB processing), as well as lens 812 shading correction parameters.
The above image white balance processing method can be realized using the photographing technique in fig. 8.
Any reference to memory, storage, database, or other medium used herein may include non-volatile and/or volatile memory. Suitable non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and bus dynamic RAM (RDRAM).
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An image white balance adjustment method, comprising:
receiving and shooting within a second preset time period to obtain a first original image;
respectively carrying out white balance processing on the first original image according to a plurality of white balance modes to generate a multi-frame image after the white balance processing;
receiving an image which is selected by a user from the multi-frame image after the white balance processing according to personal preference and is considered by the user to be most accurate in white balance effect adjustment, and storing the image as a target image;
counting the occurrence probability of a white balance mode corresponding to the target image;
acquiring a white balance mode with the highest occurrence probability, and setting the white balance mode as a preset white balance mode in a first preset time period;
receiving an instruction of shooting an image in a first preset time period;
responding to the instruction and performing white balance processing on the shot image according to the preset white balance mode to generate an image after the white balance processing, wherein the preset white balance mode is a white balance mode obtained by screening according to the image after the white balance processing in a second preset time period, the second preset time period is before the first preset time period, the second preset time period and the first preset time period are adjacent time periods, and the shooting scene where the user is located in the second preset time period and the first preset time period are close to ambient light information;
and displaying the image after the white balance processing.
2. The method of claim 1, wherein the plurality of white balance modes comprises a combination of any of incandescent light modes, daylight modes, fluorescent modes, cloudy modes, dim light modes, and shadow modes.
3. The method according to claim 1, wherein after the obtaining the white balance pattern with the highest occurrence probability and setting the white balance pattern to the preset white balance pattern within the first preset time period, the method comprises:
acquiring the first original image, wherein a white balance mode of a target image corresponding to the first original image is the preset white balance mode;
identifying the ambient light information of the first original image to obtain the ambient light information of the first original image;
and matching the environment light information of the shot second original image with the environment light information of the first original image, and when the matching degree reaches a set threshold value, performing white balance processing on the second original image by adopting the preset white balance mode, and displaying the image after the white balance processing.
4. The method according to claim 1, wherein the receiving user selects a target image from the white-balance-processed multi-frame images to save according to personal preference, and comprises:
displaying the multi-frame image subjected to white balance processing on a display screen in a thumbnail mode;
receiving the clicking operation of the user on the thumbnail;
the thumbnail corresponding to the clicking operation is amplified and displayed, so that a user can view and select the image corresponding to the thumbnail;
and receiving the image selected by the user according to personal preference as the target image and saving the target image.
5. The method according to claim 1, wherein the second predetermined period of time and the first predetermined period of time are the same period of time in adjacent predetermined periods.
6. An image white balance adjustment apparatus, characterized in that the apparatus comprises:
the first original image shooting module is used for receiving and shooting in a second preset time period to obtain a first original image;
the multiple white balance mode processing module is used for respectively carrying out white balance processing on the first original image according to multiple white balance modes to generate a multi-frame image after the white balance processing;
the target image selection module is used for receiving an image which is considered by a user to be most accurate in white balance effect adjustment and selected from the multi-frame images after the white balance processing according to personal preference of the user, and storing the image as a target image;
the white balance mode occurrence probability counting module is used for counting the occurrence probability of the white balance mode corresponding to the target image;
the device comprises a preset white balance mode acquisition module, a white balance mode setting module and a white balance mode setting module, wherein the preset white balance mode acquisition module is used for acquiring a white balance mode with the highest occurrence probability and setting the white balance mode as a preset white balance mode in a first preset time period;
the image shooting instruction receiving module is used for receiving an image shooting instruction in a first preset time period;
a white balance processing module, configured to perform white balance processing on the captured image according to the preset white balance mode in response to the instruction, and generate an image after the white balance processing, where the preset white balance mode is a white balance mode obtained by screening according to the image after the white balance processing in a second preset time period, the second preset time period is before the first preset time period, the second preset time period and the first preset time period are adjacent time periods, and a shooting scene where a user is located in the second preset time period and the first preset time period are close to ambient light information;
and the image display module is used for displaying the image after the white balance processing.
7. The apparatus of claim 6, further comprising:
the first original image acquisition module is used for acquiring a first original image, and the white balance mode of a target image corresponding to the first original image is a preset white balance mode;
the ambient light information identification module is used for identifying the ambient light information of the first original image to obtain the ambient light information of the first original image;
and the environment light information matching and white balance processing module is used for matching the environment light information of the shot second original image with the environment light information of the first original image, and when the matching degree reaches a set threshold value, performing white balance processing on the second original image in a preset white balance mode, and displaying the image after the white balance processing.
8. The device of claim 6, wherein the target image selection module is further configured to display the white-balanced multi-frame image on a display screen in a thumbnail mode; receiving the click operation of a user on the thumbnail; amplifying and displaying the thumbnail corresponding to the clicking operation so that the user can view and select the image corresponding to the thumbnail; and receiving the image selected by the user according to personal preference as the target image and saving the target image.
9. An electronic device comprising a memory and a processor, the memory having stored therein computer-readable instructions, wherein the instructions, when executed by the processor, cause the processor to perform the steps of the image white balance adjustment method according to any one of claims 1 to 5.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the image white balance adjustment method according to any one of claims 1 to 5.
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