CN108040204B - Image shooting method and device based on multiple cameras and storage medium - Google Patents
Image shooting method and device based on multiple cameras and storage medium Download PDFInfo
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- CN108040204B CN108040204B CN201711269243.5A CN201711269243A CN108040204B CN 108040204 B CN108040204 B CN 108040204B CN 201711269243 A CN201711269243 A CN 201711269243A CN 108040204 B CN108040204 B CN 108040204B
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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
- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
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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
- H04N23/60—Control of cameras or camera modules
- H04N23/617—Upgrading or updating of programs or applications for camera control
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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
- H04N23/60—Control of cameras or camera modules
- H04N23/667—Camera operation mode switching, e.g. between still and video, sport and normal or high- and low-resolution modes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/52—Details of telephonic subscriber devices including functional features of a camera
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Abstract
The disclosure relates to an image shooting method, an image shooting device and a storage medium based on multiple cameras, and relates to the technical field of mobile terminals, wherein the multiple cameras comprise WDR cameras and high-sensitivity cameras, and the method comprises the following steps: determining a current shooting mode; and selecting a target camera from the WDR camera and the high-sensitivity camera based on the shooting mode, and shooting an image through the target camera. That is, in the embodiment of the present disclosure, the multiple cameras may be configured as a WDR camera and a high-sensitivity camera, so that when performing image capturing, if the target camera is the WDR camera, the current problem of low dynamic of the dual cameras may be solved, and if the target camera is the high-sensitivity camera, the current problem of low sensitivity of the dual cameras may be solved, thereby effectively improving the imaging quality of the image.
Description
Technical Field
The present disclosure relates to the field of mobile terminal technologies, and in particular, to a method and an apparatus for capturing images based on multiple cameras, and a computer-readable storage medium.
Background
Currently, mobile terminals such as smart phones and tablet computers are equipped with cameras, and through the cameras equipped on the mobile terminals, the mobile terminals can take images. Further, in order to improve the quality of the shot images, with the development of cameras and image processing technologies, a plurality of cameras are configured on a part of the mobile terminals, most commonly, two cameras are configured on the mobile terminals, and the mobile terminals can select one camera from the two cameras or adopt two cameras to shoot images simultaneously according to shooting scenes.
In the related art, two main configuration modes of the dual cameras configured on the mobile terminal are as follows: the two cameras are respectively a wide-angle camera and a long-focus camera, and in the configuration mode, the wide-angle camera is mainly used for close-distance shooting and the long-focus camera is mainly used for long-distance shooting.
The second mode is as follows: the two cameras are respectively a color camera and a black-and-white camera, wherein the color camera is mainly used for shooting color details, the black-and-white camera is mainly used for shooting brightness details, when an image is shot, the color camera and the black-and-white camera are simultaneously used for shooting the image, and then two images shot by the two cameras are fused to obtain a final shot image.
Disclosure of Invention
In order to overcome the problems of low dynamic and low light sensitivity when double cameras configured on a mobile terminal shoot images in the related art, the disclosure provides an image shooting method and device based on multiple cameras and a computer readable storage medium.
According to a first aspect of the embodiments of the present disclosure, there is provided an image capturing method based on multiple cameras including a WDR (Wide Dynamic Range) camera and a high-sensitivity camera, the method including:
determining a current shooting mode;
selecting a target camera from the WDR camera and the high-sensitivity camera based on the shooting mode, and shooting an image through the target camera.
Optionally, the determining the current shooting mode includes:
acquiring the light intensity reflected by a plurality of physical points in the current shooting scene;
and determining the shooting mode based on the intensities of the light rays reflected by the physical points, wherein the physical points in the current shooting scene refer to a plurality of points in an area corresponding to the current framing picture.
Optionally, the determining the shooting mode based on the intensities of the light reflected by the plurality of physical points includes:
determining the proportion of the number of the physical points with the reflected light intensity smaller than a first preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a first proportion;
determining the proportion of the number of the physical points with the reflected light intensity larger than a second preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a second proportion, wherein the first preset light intensity is smaller than the second preset light intensity;
determining the proportion of the number of the physical points with the reflected light intensity larger than the first preset light intensity and smaller than the second preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a third proportion;
determining the photographing mode based on the first ratio, the second ratio, and the third ratio.
Optionally, the determining the shooting mode based on the first proportion, the second proportion and the third proportion includes:
when the first proportion is larger than the sum of the second proportion and the third proportion, determining that the shooting mode is a dark light shooting mode;
when the second proportion is larger than the sum of the first proportion and the third proportion, determining that the shooting mode is a strong light shooting mode;
the selecting a target camera from the WDR camera and the high-sensitivity camera based on the shooting mode includes:
determining the high-sensitivity camera as the target camera.
Optionally, the determining the shooting mode based on the intensities of the light reflected by the plurality of physical points includes:
obtaining a maximum light intensity and a minimum light intensity from the light intensities reflected by the plurality of physical points;
judging whether the difference value between the maximum light intensity and the minimum light intensity is larger than a preset light intensity difference;
when the difference value between the maximum light intensity and the minimum light intensity is larger than a preset light intensity difference, determining that the shooting mode is a wide dynamic range shooting mode;
the selecting a target camera from the WDR camera and the high-sensitivity camera based on the shooting mode includes:
and determining the WDR camera as the target camera.
Optionally, before the image capturing is performed by the target camera, the method further includes:
determining the distance between a focusing point in the current shooting scene and the target camera;
after the image shooting is carried out through the target camera, the method further comprises the following steps:
and when the distance between the focusing point and the target camera is greater than the preset distance, processing the image shot by the target camera through a super-resolution algorithm, and taking the processed image as a shot image.
According to a second aspect of the embodiments of the present disclosure, there is provided a multi-camera based image capturing apparatus including a WDR camera and a high-sensitivity camera, the apparatus including:
the first determining module is used for determining the current shooting mode;
a selection module to select a target camera from the WDR camera and the high-sensitivity camera based on the shooting mode;
and the shooting module is used for shooting images through the target camera.
Optionally, the first determining module includes:
the device comprises an acquisition unit, a processing unit and a display unit, wherein the acquisition unit is used for acquiring the intensity of light rays reflected by a plurality of physical points in the current shooting scene, and the plurality of physical points in the current shooting scene refer to a plurality of points in an area corresponding to a current framing picture;
a determination unit for determining the photographing mode based on intensities of the light reflected by the plurality of physical points.
Optionally, the determining unit includes:
the first determining subunit is configured to determine a ratio of the number of physical points, of which the reflected light intensity is smaller than a first preset light intensity, to the total number of the plurality of physical points, so as to obtain a first ratio;
the first determining subunit is further configured to determine a ratio of the number of physical points, of which the reflected light intensities are greater than a second preset light intensity, to the total number of the plurality of physical points, to obtain a second ratio, where the first preset light intensity is smaller than the second preset light intensity;
the first determining subunit is further configured to determine a ratio of the number of physical points, of which the reflected light intensities are greater than the first preset light intensity and smaller than the second preset light intensity, to the total number of the plurality of physical points, to obtain a third ratio;
a second determination subunit configured to determine the shooting mode based on the first ratio, the second ratio, and the third ratio.
Optionally, the second determining subunit is specifically configured to:
when the first proportion is larger than the sum of the second proportion and the third proportion, determining that the shooting mode is a dark light shooting mode;
when the second proportion is larger than the sum of the first proportion and the third proportion, determining that the shooting mode is a strong light shooting mode;
the selection module is specifically configured to:
determining the high-sensitivity camera as the target camera.
Optionally, the determining unit includes:
an obtaining subunit, configured to obtain a maximum light intensity and a minimum light intensity from the light intensities reflected by the plurality of physical points;
the judging subunit is used for judging whether the difference value between the maximum light intensity and the minimum light intensity is greater than a preset light intensity difference;
a third determining subunit, configured to determine that the shooting mode is a wide dynamic range shooting mode when a difference between the maximum light intensity and the minimum light intensity is greater than a preset light intensity difference;
the selection module is specifically configured to:
and determining the WDR camera as the target camera.
Optionally, the apparatus further comprises:
the second determination module is used for determining the distance between a focusing point in the current shooting scene and the target camera;
and the processing module is used for processing the image shot by the target camera through a super-resolution algorithm when the distance between the focusing point and the target camera is greater than a preset distance, and taking the processed image as a shot image.
According to a third aspect of the embodiments of the present disclosure, there is provided a multi-camera based image capturing apparatus including a wide dynamic range WDR camera and a high sensitivity camera, the apparatus including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the steps of any one of the methods of the first aspect.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon instructions which, when executed by a processor, implement the steps of any one of the methods of the first aspect described above.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the embodiment of the disclosure provides an image shooting method based on multiple cameras, wherein the multiple cameras comprise WDR cameras and high-sensitivity cameras, when image shooting is carried out, a current shooting mode can be determined, then a target camera is selected from the WDR cameras and the high-sensitivity cameras based on the shooting mode, and image shooting is carried out through the target camera. That is, in the embodiment of the present disclosure, the multiple cameras may be configured as a WDR camera and a high-sensitivity camera, so that when performing image capturing, if the target camera is the WDR camera, the current problem of low dynamic of the multiple cameras may be solved, and if the target camera is the high-sensitivity camera, the current problem of low light sensitivity of the multiple cameras may be solved, thereby effectively improving the imaging quality of the image.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart illustrating a multi-camera based image capturing method according to an exemplary embodiment.
Fig. 2 is a flowchart illustrating a multi-camera based image capturing method according to an exemplary embodiment.
Fig. 3A is a block diagram illustrating a multi-camera based image capture device according to an exemplary embodiment.
FIG. 3B is a block diagram illustrating a first determination module in accordance with an exemplary embodiment.
Fig. 3C is a block diagram illustrating a multi-camera based image capture device according to an exemplary embodiment.
Fig. 4 is a block diagram illustrating a multi-camera based image capture device according to an exemplary embodiment.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Before explaining the embodiments of the present disclosure in detail, an application scenario related to the embodiments of the present disclosure will be described.
Currently, in daily life, more and more users are used to taking images by using mobile terminals such as smart phones and tablet computers, and meanwhile, the quality requirements of the users for the images taken by the mobile terminals are higher and higher. With the development of camera hardware technology and image processing technology, in order to further meet user requirements and improve the quality of shot images, a part of mobile terminals are configured with multiple cameras. Wherein each camera of the multiple cameras may have its own unique advantages, e.g., one camera is better suited to capture a certain scene, while another camera is more conducive to capturing another scene. Therefore, when image shooting is carried out, the mobile terminal can select different cameras from the multiple cameras to shoot according to different shooting scenes, and the imaging quality of the shot images is higher. Or, the mobile terminal may also adopt two cameras to shoot simultaneously, each camera is responsible for collecting the details good for collection in the shooting scene, and then, images shot by the two cameras may be fused to obtain a shot image with higher image quality. The image shooting method provided by the embodiment of the disclosure can be used in the application scene, and the multiple cameras configured on the mobile terminal are used for shooting images, so that the imaging quality of the shot images is improved.
In the related art, there are two main configuration modes for multiple cameras configured on a mobile terminal, the first mode is: many cameras are wide angle camera and long focus camera respectively, second kind mode: the multiple cameras are respectively a color camera and a black-and-white camera. In the two configurations, the dynamic ranges of the multiple cameras are both low, that is, when the difference between the brightest area and the darkest area in the current shooting scene is large, the details of the two areas may not be clearly imaged at the same time, and in this case, the quality of the image shot by any one of the multiple cameras is poor. In addition, when the light of the current shooting scene is extremely dark, the quality of the shot image is poor because the sensitivity of the cameras in the two configurations is limited. Based on this, the embodiment of the present disclosure provides multiple cameras with different configuration modes and a method for performing image capturing based on the multiple cameras. In this configuration, the multiple cameras are a WDR camera and a high-sensitivity camera, respectively, and then, a method for performing image capturing based on the multiple cameras according to the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a flowchart illustrating a multi-camera based image capturing method, as shown in fig. 1, for use in a mobile terminal, the multi-camera including a WDR camera and a high-sensitivity camera, according to an exemplary embodiment, the method including the steps of:
in step 101, the current shooting mode is determined.
In step 102, a target camera is selected from the WDR camera and the high-sensitivity camera based on the shooting mode, and image shooting is performed by the target camera.
The embodiment of the disclosure provides an image shooting method based on multiple cameras, wherein the multiple cameras comprise WDR cameras and high-sensitivity cameras, when image shooting is carried out, a current shooting mode can be determined, then a target camera is selected from the WDR cameras and the high-sensitivity cameras based on the shooting mode, and image shooting is carried out through the target camera. That is, in the embodiment of the present disclosure, the multiple cameras may be configured as a WDR camera and a high-sensitivity camera, so that when performing image capturing, if the target camera is the WDR camera, the current problem of low dynamic of the multiple cameras may be solved, and if the target camera is the high-sensitivity camera, the current problem of low sensitivity of the multiple cameras may be solved, thereby effectively improving the imaging quality of the image.
Optionally, determining the current shooting mode includes:
acquiring the intensity of light reflected by a plurality of physical points in the current shooting scene, wherein the plurality of physical points in the current shooting scene refer to a plurality of points in an area corresponding to the current viewing picture;
the photographing mode is determined based on the intensity of light reflected from the plurality of physical points.
Optionally, determining the shooting mode based on the intensities of the light reflected by the plurality of physical points comprises:
determining the proportion of the number of the physical points with the reflected light intensity smaller than the first preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a first proportion;
determining the proportion of the number of the physical points with the reflected light intensity larger than a second preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a second proportion, wherein the first preset light intensity is smaller than the second preset light intensity;
determining the proportion of the number of the physical points with the reflected light intensity larger than the first preset light intensity and smaller than the second preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a third proportion;
the shooting mode is determined based on the first ratio, the second ratio, and the third ratio.
Optionally, determining the shooting mode based on the first ratio, the second ratio and the third ratio comprises:
when the first proportion is larger than the sum of the second proportion and the third proportion, determining that the shooting mode is a dark light shooting mode;
when the second proportion is larger than the sum of the first proportion and the third proportion, determining that the shooting mode is a strong light shooting mode;
selecting a target camera from a WDR camera and a high-sensitivity camera based on a shooting mode, comprising:
and determining the high-sensitivity camera as a target camera.
Optionally, determining the shooting mode based on the intensities of the light reflected by the plurality of physical points comprises:
acquiring maximum light intensity and minimum light intensity from the light brightness reflected by a plurality of physical points;
judging whether the difference value between the maximum light intensity and the minimum light intensity is greater than a preset light intensity difference or not;
when the difference value between the maximum light intensity and the minimum light intensity is larger than the preset light intensity difference, determining that the shooting mode is a wide dynamic range shooting mode;
selecting a target camera from a WDR camera and a high-sensitivity camera based on a shooting mode, comprising:
and determining the WDR camera as a target camera.
Optionally, before capturing an image by using the target camera, the method further includes:
determining the distance between a focusing point in the current shooting scene and a target camera;
after carrying out image shooting through the target camera, still include:
and when the distance between the focusing point and the target camera is greater than the preset distance, processing the image shot by the target camera through a super-resolution algorithm, and taking the processed image as a shot image.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Fig. 2 is a diagram illustrating a multi-camera-based image capturing method applied to a mobile terminal, where the mobile terminal is configured with multiple cameras, and the multiple cameras are a WDR camera and a high-sensitivity camera, respectively, according to an exemplary embodiment, and the method includes the following steps:
in step 201, the current shooting mode is determined.
In an embodiment of the present disclosure, the multi-camera may include a WDR camera and a high-sensitivity camera. The dynamic range refers to the illumination ratio of the brightest part and the darkest part in a scene which can be seen clearly by the camera at the same time, and the adaptability of the camera to the illumination reflection of the scenery in the shooting scene is reflected. Generally, the ratio of the illuminance of the brightest and darkest parts in a scene that can be shot by a common camera is low, that is, the dynamic range of the common camera is low, and when shooting, if the ratio of the illuminance of the brightest and darkest parts in the shot scene exceeds the dynamic range, the problem of underexposure of the darker parts or overexposure of the lighter parts can occur. The WDR camera refers to a camera with a dynamic range larger than that of a common camera. Wherein the dynamic range of the common camera is between 5EV and 9 EV. The dynamic range of the wide dynamic range camera is between 10EV and 14 EV. Additionally, another way to characterize dynamic range is currently expressed in decibels, where the WDR camera may be a WDR camera with a dynamic range greater than 50 dB. For example, the wide dynamic range of a WDR camera may be 56dB, 95dB, 120dB, etc.
In addition, it should be noted that the high-sensitivity camera refers to a camera with higher sensitivity to light, and in general, the sensitivity of a common camera can be between ISO50-400, and can reach ISO100, ISO200 and ISO400, and when reaching ISO400, the noise of a captured image is increased significantly, and the image quality is poor. In the embodiment of the disclosure, the mobile terminal may employ a camera with a sensitivity between ISO100-ISO25600, for example, the mobile terminal may employ a camera with a sensitivity up to ISO400 or above, thereby providing a higher sensitivity selection range for the user. It should be noted that the higher the sensitivity, the higher the sensitivity of the camera to light, that is, the less the darkest value of light that the camera can sense, in which case the sharper the image that the camera can capture in a dark environment.
Alternatively, the multi-camera may include only two cameras, which are a WDR camera and a high-sensitivity camera, and of course, the multi-camera may also be more than two cameras, in which case, the WDR camera and the high-sensitivity camera are included in the more than two cameras, and in addition, other cameras, for example, a long-focus camera, a wide-angle camera, and the like, may also be included. In the embodiments of the present disclosure, a WDR camera and a high-sensitivity camera are taken as examples for explanation.
For a mobile terminal provided with the WDR camera and the high-sensitivity camera, when the mobile terminal is used for image shooting, the mobile terminal may first determine a current shooting mode, so as to select a corresponding more appropriate camera for image shooting according to the shooting mode.
The WDR camera and the high-sensitivity camera which form the multiple cameras provided in the embodiment of the present disclosure are both cameras closely related to light, and have a great advantage in solving the problem of dim light shooting, so that the mobile terminal can determine the shooting mode according to the light parameters in the current shooting scene. The specific operation of the mobile terminal for determining the current shooting mode may be: acquiring the light intensity reflected by a plurality of physical points in the current shooting scene; the photographing mode is determined based on the intensity of light reflected from the plurality of physical points.
The mobile terminal can obtain the intensity of light reflected by a plurality of physical points in the current shooting scene, wherein the physical points are actually points in the current shooting scene of the mobile terminal. When the intensity of the light reflected by the physical points is higher, the light in the current shooting scene corresponding to the current framing picture of the mobile terminal is indicated to be brighter. Otherwise, the darker the indication.
After the light intensity reflected by the plurality of physical points is obtained, the mobile terminal can determine the proportion of the number of the physical points, of which the reflected light intensity is smaller than the first preset light intensity, in the plurality of physical points to the total number of the plurality of physical points, so as to obtain a first proportion; determining the proportion of the number of the physical points with the reflected light intensity larger than a second preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a second proportion, wherein the first preset light intensity is smaller than the second preset light intensity; determining the proportion of the number of the physical points with the reflected light intensity larger than the first preset light intensity and smaller than the second preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a third proportion; the shooting mode is determined based on the first ratio, the second ratio, and the third ratio.
It should be noted that, in the embodiment of the present disclosure, the first predetermined light intensity is smaller than the second predetermined light intensity, and the first predetermined light intensity may be a light intensity reflected by an object with a reflectivity of 18% in dusk, and the second predetermined light intensity may be a light intensity reflected by an object with a reflectivity of 18% in natural light, for example, a reflected light intensity in the midday sunlight in winter. By determining the first proportion, the mobile terminal can determine the proportion of the darker part in the current shooting scene, by determining the second proportion, the mobile terminal can determine the proportion of the brighter part in the current shooting scene, and by determining the third proportion, the mobile terminal can determine the proportion of the part with proper light intensity in the current shooting scene.
After determining the first ratio, the second ratio, and the third ratio, the mobile terminal may determine a photographing mode to be employed based on the sizes of the first ratio, the second ratio, and the third ratio. When the first proportion is larger than the sum of the second proportion and the third proportion, determining that the shooting mode is a dark light shooting mode; and when the second proportion is larger than the sum of the first proportion and the third proportion, determining that the shooting mode is the strong light shooting mode.
The sum of the first proportion, the second proportion and the third proportion is 100%, and when the first proportion is larger than the sum of the second proportion and the third proportion, the first proportion is larger than 50%, that is to say, the number of the physical points of which the emitted light intensity is smaller than the first preset light intensity is larger than 50% in the plurality of physical points in the current shooting scene. As can be seen from the foregoing description, the first predetermined light intensity may be a light intensity reflected by an object with a reflectivity of 18% at dusk, that is, the first predetermined light intensity may be the highest light intensity when shooting a scene with dim light, and therefore, when the number of physical points with reflected light intensities smaller than the first predetermined light intensity among the plurality of physical points is greater than 50%, the current shooting scene may be considered as a shooting scene with dim light, and at this time, the mobile terminal may determine that the current shooting mode is the shooting mode with dim light.
Similarly, when the second ratio is greater than the sum of the first ratio and the third ratio, it indicates that the second ratio is greater than 50%, that is, the number of physical points, of which the emitted light intensity is greater than the second preset light intensity, is greater than 50% among the plurality of physical points in the current shooting scene. As can be seen from the foregoing description, the second preset light intensity may be a light intensity reflected by an object with a reflectivity of 18% under natural light, that is, the second preset light intensity may be the lowest light intensity when a scene is shot with strong light, and therefore, when the number of physical points of which the reflected light intensities are greater than the second preset light intensity among the plurality of physical points is greater than 50%, the current scene is considered as the scene is shot with strong light, and at this time, the mobile terminal may determine that the current shooting mode is the strong light shooting mode.
When the third ratio is greater than the sum of the first ratio and the second ratio, it is indicated that the third ratio is greater than 50%, that is, the number of physical points, of which the emitted light intensity is between the first preset light intensity and the second preset light intensity, in the plurality of physical points in the current shooting scene is greater than 50%. Based on the foregoing description, it can be determined that the current shooting scene is the normal light shooting scene when the first preset light intensity is smaller than the first preset light intensity, and the current shooting scene is the normal light shooting scene when the second preset light intensity is larger than the second preset light intensity.
Optionally, in the embodiment of the present disclosure, after the mobile terminal obtains the light intensities emitted by the plurality of physical points in the current shooting scene, the mobile terminal may directly calculate an average value of the light intensities reflected by the plurality of physical points to obtain an average light intensity, and then the mobile terminal may determine the shooting mode to be used based on the average light intensity. The mobile terminal can determine whether the average light intensity is within a preset light intensity range, if so, the current shooting mode can be determined to be a normal light shooting mode, and if the average light intensity is smaller than a lower limit value within the preset light intensity range, the current shooting mode can be determined to be a dim light shooting mode. If the average light intensity is greater than the upper limit of the preset light intensity range, the current shooting mode can be determined to be the strong light shooting mode.
Optionally, in this embodiment of the present disclosure, after obtaining the light intensities reflected by a plurality of physical points in the current shooting scene, the mobile terminal may divide the current framing picture into a plurality of areas, then calculate an average light intensity of a corresponding area in the current shooting scene of each of the plurality of areas, respectively, and determine a shooting mode to be used based on the average light intensity of the corresponding area in the current shooting scene of each of the plurality of areas. The terminal can determine the average light intensity of the corresponding area of each area in the current shooting scene, then determine the shooting mode corresponding to the average light degree of the corresponding area of each area in the current shooting scene according to the method, and then determine the number of the areas belonging to the same shooting mode in a plurality of areas, and determine the shooting mode corresponding to the maximum number as the current shooting mode.
In addition, while the current shooting mode is determined by the above methods, the terminal may determine whether the current shooting mode is a wide dynamic range by the following method based on the intensities of light reflected by a plurality of physical points in the current shooting scene, so as to determine whether to use a WDR camera.
The mobile terminal can obtain the maximum light intensity and the minimum light intensity from the light intensities reflected by a plurality of physical points; judging whether the difference value between the maximum light intensity and the minimum light intensity is greater than a preset light intensity difference or not; when the difference value between the maximum light intensity and the minimum light intensity is larger than the preset light intensity difference, determining that the shooting mode is a wide dynamic range shooting mode;
based on the foregoing description of the dynamic range, it can be seen that when the maximum light intensity and the minimum light intensity of the light front intensities reflected by the plurality of physical points reflect the brightest and darkest portions of the current shooting scene, a luminance difference between the brightest and darkest portions of the current shooting scene can be obtained by calculating a difference between the maximum light intensity and the minimum light intensity, and if the luminance difference is greater than a preset light intensity difference, the current shooting mode is a wide dynamic range mode, so that the mobile terminal can clearly present the darkest and brightest portions of the current scene at the same time.
In step 202, a target camera is selected from the WDR camera and the high-sensitivity camera based on the shooting mode.
After the mobile terminal determines the current shooting mode through the method in step 201, the mobile terminal may select a target camera from the WDR camera and the high-sensitivity camera according to the current shooting mode, where the target camera is the selected camera for shooting.
When the determined shooting mode is a dark light shooting mode or a strong light shooting mode, the camera is required to be more sensitive to light because the intensity of light reflected in the dark light shooting mode and the intensity of light reflected in the strong light shooting mode are out of a normal light range, and therefore the mobile terminal can select the high-sensitivity camera to shoot. When the determined shooting mode is the normal light shooting mode, the mobile terminal can take any one of the multiple cameras as a target camera. When the determined shooting mode is the wide dynamic range mode, the mobile terminal can take the WDR camera as the target camera.
In step 203, the distance between the focus point in the current shooting scene and the target camera is determined, and image shooting is performed through the target camera.
After determining the target camera by the method in step 202, the mobile terminal may further determine a distance between the focus point in the current shooting scene and the target camera by this step. The distance between the focus and the target camera can be determined by the mobile terminal through methods such as laser ranging and triangular ranging, and specific implementation manners of the methods such as laser ranging and triangular ranging can refer to related technologies, which are not described herein again in the embodiments of the present disclosure.
After the mobile terminal determines the distance between the focusing point and the target camera, whether the current shooting is close-range shooting or long-range shooting can be further judged through the distance. The mobile terminal can judge whether the distance between the focus and the target camera is greater than a preset distance, when the distance between the focus and the target camera is greater than the preset distance, the current long-range shooting can be determined, and otherwise, the current short-range shooting can be determined. The preset distance may be the farthest distance that can be shot in the multiple cameras.
After the distance between the focusing point and the target camera in the current shooting scene is determined, the mobile terminal can shoot images through the target camera.
Optionally, if it is determined that the current shooting is close-range shooting according to the distance between the focus point and the target camera in the current shooting scene, the mobile terminal may directly display an image shot by the target camera as a final shot image.
If it is determined that the current shooting is the long-range shooting according to the distance between the focusing point and the target camera in the current shooting scene, the mobile terminal may process the image shot by the target camera through step 204, so as to obtain a final shot image.
In step 204, when the distance between the focusing point and the target camera is greater than the preset distance, processing the image shot by the target camera through a super-resolution algorithm, and taking the processed image as a shot image.
Based on the description in step 203, when the distance between the focus point and the target camera is greater than the preset distance, it is determined that the current shot is a long-range shot, and at this time, in order to ensure the imaging quality of the long-range image, the mobile terminal may process the image shot by the target camera through a super-resolution algorithm, and display the processed image as a final shot image.
The super-resolution algorithm is to improve an image with low resolution to high resolution through a certain algorithm, and the image with high resolution has higher pixel density, more detailed information and finer image quality. Generally, the super-resolution algorithm mainly comprises the following two types, namely super-resolution reconstruction based on a single image and super-resolution reconstruction based on an image sequence. When the super-resolution reconstruction algorithm based on the image sequence is adopted, since the detail content of the image needs to be estimated by utilizing the mutual overlapping information between the plurality of low-resolution images through mutual supplementation, when the target camera is adopted for shooting in step 204, the plurality of images can be shot, so that the mobile terminal can obtain a final shot image according to the super-resolution algorithm processing.
It should be noted that, reference may be made to related technologies for specific implementation manners of super-resolution reconstruction based on a single image and super-resolution reconstruction based on an image sequence, and details of this embodiment of the disclosure are not repeated here.
In the disclosed embodiment, the multi-camera includes a WDR camera and a high-sensitivity camera, and when image capturing is performed, a current capturing mode may be determined, and then a target camera is selected from the WDR camera and the high-sensitivity camera based on the capturing mode, and image capturing is performed by the target camera. That is, in the embodiment of the present disclosure, the multiple cameras may be configured as a WDR camera and a high-sensitivity camera, so that when performing image shooting, if the target camera is the WDR camera, the problem of low dynamic of the current multiple cameras may be solved, so that the camera may obtain a shot image with high image quality even for a shooting scene with a great contrast. If the target camera is a high-sensitivity camera, the problem of low sensitivity of the current multiple cameras can be solved, so that a shot image with higher imaging quality is provided in a dark light environment. Further, the embodiment of the disclosure may further determine whether the current shooting is close-range shooting or long-range shooting according to the distance between the focusing point and the target camera, and if the current shooting is long-range shooting, the image shot by the target camera may be processed through a super-resolution algorithm, so as to obtain a shot image that is comparable to the quality of a long-range image shot by a telephoto camera, that is, the embodiment of the disclosure may further ensure the image imaging quality under long-range shooting while improving the imaging quality through a WDR camera and a high-sensitivity camera.
Next, a multi-camera based image capturing apparatus provided by an embodiment of the present disclosure will be described.
Fig. 3A is a block diagram illustrating a multi-camera based image capture device 300 according to an exemplary embodiment. The device is applied to a mobile terminal, and the mobile terminal is provided with a plurality of cameras which are respectively a WDR camera and a high-sensitivity camera. Referring to fig. 3A, the apparatus includes a first determining module 301, a selecting module 302, and a photographing module 303.
A first determining module 301, configured to determine a current shooting mode;
a selection module 302 for selecting a target camera from the WDR camera and the high-sensitivity camera based on a shooting mode;
and a shooting module 303, configured to perform image shooting through the target camera.
Optionally, referring to fig. 3B, the first determining module 301 includes:
an obtaining unit 3011, configured to obtain intensities of light rays reflected by multiple physical points in a current shooting scene;
a determination unit 3012 for determining a shooting mode based on intensities of light reflected by the plurality of physical points.
Optionally, the determining unit 3012 includes:
the first determining subunit is used for determining the proportion of the number of the physical points with the reflected light intensity smaller than the first preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a first proportion;
the first determining subunit is further configured to determine a ratio of the number of the physical points, of which the reflected light intensities are greater than a second preset light intensity, to the total number of the plurality of physical points, to obtain a second ratio, where the first preset light intensity is smaller than the second preset light intensity;
the first determining subunit is further configured to determine a ratio of the number of the physical points, of which the reflected light intensities are greater than the first preset light intensity and less than the second preset light intensity, to the total number of the plurality of physical points, to obtain a third ratio;
a second determination subunit configured to determine a shooting mode based on the first ratio, the second ratio, and the third ratio.
Optionally, the second determining subunit is specifically configured to:
when the first proportion is larger than the sum of the second proportion and the third proportion, determining that the shooting mode is a dark light shooting mode;
when the second proportion is larger than the sum of the first proportion and the third proportion, determining that the shooting mode is a strong light shooting mode;
correspondingly, the selection module is specifically configured to:
and determining the high-sensitivity camera as a target camera.
Optionally, the determining unit 3012 includes:
the acquisition subunit is used for acquiring the maximum light intensity and the minimum light intensity from the light brightness reflected by the plurality of physical points;
the judging subunit is used for judging whether the difference value between the maximum light intensity and the minimum light intensity is greater than a preset light intensity difference;
the third determining subunit is used for determining that the shooting mode is a wide dynamic range shooting mode when the difference value between the maximum light intensity and the minimum light intensity is larger than the preset light intensity difference;
correspondingly, the selection module is specifically configured to:
and determining the WDR camera as a target camera.
Optionally, referring to fig. 3C, the apparatus 300 further comprises:
a second determining module 304, configured to determine a distance between a focus point in a current shooting scene and a target camera;
and the processing module 305 is configured to process the image captured by the target camera through a super-resolution algorithm when the distance between the focus point and the target camera is greater than the preset distance, and take the processed image as the captured image.
In the embodiment of the disclosure, the multiple cameras are respectively a WDR camera and a high-sensitivity camera, when image shooting is performed, a current shooting mode can be determined, and then a target camera is selected from the WDR camera and the high-sensitivity camera based on the shooting mode, and image shooting is performed by the target camera. That is, in the embodiment of the present disclosure, the multiple cameras may be configured as a WDR camera and a high-sensitivity camera, so that when performing image capturing, if the target camera is the WDR camera, the current problem of low dynamic of the multiple cameras may be solved, and if the target camera is the high-sensitivity camera, the current problem of low sensitivity of the multiple cameras may be solved, thereby effectively improving the imaging quality of the image.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 4 is a block diagram illustrating an apparatus 400 for multi-camera based image capture according to an example embodiment. For example, the apparatus 400 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 4, the apparatus 400 may include one or more of the following components: processing components 402, memory 404, power components 406, multimedia components 408, audio components 410, input/output (I/O) interfaces 412, sensor components 414, and communication components 416.
The processing component 402 generally controls overall operation of the apparatus 400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 402 can include one or more modules that facilitate interaction between the processing component 402 and other components. For example, the processing component 402 can include a multimedia module to facilitate interaction between the multimedia component 408 and the processing component 402.
The memory 404 is configured to store various types of data to support operations at the apparatus 400. Examples of such data include instructions for any application or method operating on the device 400, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 404 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The multimedia component 408 includes a screen that provides an output interface between the device 400 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes one front facing camera and two rear facing cameras. Or two or more rear cameras are included. Wherein. When two rear cameras are included, the two rear cameras are respectively a WDR camera and a high-sensitivity camera. When the two or more rear cameras are included, the two or more rear cameras include a WDR camera and a high-sensitivity camera. The front camera and/or the rear camera may receive external multimedia data when the apparatus 400 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 410 is configured to output and/or input audio signals. For example, audio component 410 includes a Microphone (MIC) configured to receive external audio signals when apparatus 400 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 404 or transmitted via the communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.
The I/O interface 412 provides an interface between the processing component 402 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 414 includes one or more sensors for providing various aspects of status assessment for the apparatus 400. For example, the sensor assembly 414 may detect an open/closed state of the apparatus 400, the relative positioning of the components, such as a display and keypad of the apparatus 400, the sensor assembly 414 may also detect a change in the position of the apparatus 400 or a component of the apparatus 400, the presence or absence of user contact with the apparatus 400, orientation or acceleration/deceleration of the apparatus 400, and a change in the temperature of the apparatus 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 416 is configured to facilitate wired or wireless communication between the apparatus 400 and other devices. The apparatus 400 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 400 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the methods provided by the embodiments shown in fig. 1 or fig. 2 and described above.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 404 comprising instructions, executable by the processor 420 of the apparatus 400 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
A non-transitory computer readable storage medium, wherein instructions, when executed by a processor of a mobile terminal, enable the mobile terminal to perform a multi-camera based image method provided by the embodiments of fig. 1 or fig. 2 described above.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (12)
1. A multi-camera based image capture method, the multi-camera comprising a wide dynamic range, WDR, camera and a high-sensitivity camera, the method comprising:
acquiring the intensity of light reflected by a plurality of physical points in the current shooting scene, wherein the plurality of physical points in the current shooting scene refer to a plurality of points in an area corresponding to the current viewing picture; determining a current shooting mode based on the intensities of the light rays reflected by the plurality of physical points;
selecting a target camera from the WDR camera and the high-sensitivity camera based on the shooting mode, and shooting an image through the target camera.
2. The method of claim 1, wherein determining the photography mode based on the intensities of the light reflected from the plurality of physical points comprises:
determining the proportion of the number of the physical points with the reflected light intensity smaller than a first preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a first proportion;
determining the proportion of the number of the physical points with the reflected light intensity larger than a second preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a second proportion, wherein the first preset light intensity is smaller than the second preset light intensity;
determining the proportion of the number of the physical points with the reflected light intensity larger than the first preset light intensity and smaller than the second preset light intensity in the plurality of physical points to the total number of the plurality of physical points to obtain a third proportion;
determining the photographing mode based on the first ratio, the second ratio, and the third ratio.
3. The method of claim 2, wherein the determining the photographing mode based on the first proportion, the second proportion, and the third proportion comprises:
when the first proportion is larger than the sum of the second proportion and the third proportion, determining that the shooting mode is a dark light shooting mode;
when the second proportion is larger than the sum of the first proportion and the third proportion, determining that the shooting mode is a strong light shooting mode;
the selecting a target camera from the WDR camera and the high-sensitivity camera based on the shooting mode includes:
determining the high-sensitivity camera as the target camera.
4. The method of claim 1, wherein determining the photography mode based on the intensities of the light reflected from the plurality of physical points comprises:
obtaining a maximum light intensity and a minimum light intensity from the light intensities reflected by the plurality of physical points;
judging whether the difference value between the maximum light intensity and the minimum light intensity is larger than a preset light intensity difference;
when the difference value between the maximum light intensity and the minimum light intensity is larger than a preset light intensity difference, determining that the shooting mode is a wide dynamic range shooting mode;
the selecting a target camera from the WDR camera and the high-sensitivity camera based on the shooting mode includes:
and determining the WDR camera as the target camera.
5. The method of claim 1, wherein before capturing the image by the target camera, further comprising:
determining the distance between a focusing point in the current shooting scene and the target camera;
after the image shooting is carried out through the target camera, the method further comprises the following steps:
and when the distance between the focusing point and the target camera is greater than the preset distance, processing the image shot by the target camera through a super-resolution algorithm, and taking the processed image as a shot image.
6. A multi-camera based image capture device, the multi-camera including a wide dynamic range, WDR, camera and a high-sensitivity camera, the device comprising:
the device comprises a first determining module, a second determining module and a third determining module, wherein the first determining module is used for acquiring the light intensity reflected by a plurality of physical points in the current shooting scene, and the plurality of physical points in the current shooting scene refer to a plurality of points in an area corresponding to a current framing picture; determining a current shooting mode based on the intensities of the light rays reflected by the plurality of physical points;
a selection module to select a target camera from the WDR camera and the high-sensitivity camera based on the shooting mode;
and the shooting module is used for shooting images through the target camera.
7. The apparatus of claim 6, wherein the determining unit comprises:
the first determining subunit is configured to determine a ratio of the number of physical points, of which the reflected light intensity is smaller than a first preset light intensity, to the total number of the plurality of physical points, so as to obtain a first ratio;
the first determining subunit is further configured to determine a ratio of the number of physical points, of which the reflected light intensities are greater than a second preset light intensity, to the total number of the plurality of physical points, to obtain a second ratio, where the first preset light intensity is smaller than the second preset light intensity;
the first determining subunit is further configured to determine a ratio of the number of physical points, of which the reflected light intensities are greater than the first preset light intensity and smaller than the second preset light intensity, to the total number of the plurality of physical points, to obtain a third ratio;
a second determination subunit configured to determine the shooting mode based on the first ratio, the second ratio, and the third ratio.
8. The apparatus according to claim 7, wherein the second determining subunit is specifically configured to:
when the first proportion is larger than the sum of the second proportion and the third proportion, determining that the shooting mode is a dark light shooting mode;
when the second proportion is larger than the sum of the first proportion and the third proportion, determining that the shooting mode is a strong light shooting mode;
the selection module is specifically configured to:
determining the high-sensitivity camera as the target camera.
9. The apparatus of claim 6, wherein the determining unit comprises:
an obtaining subunit, configured to obtain a maximum light intensity and a minimum light intensity from the light intensities reflected by the plurality of physical points;
the judging subunit is used for judging whether the difference value between the maximum light intensity and the minimum light intensity is greater than a preset light intensity difference;
a third determining subunit, configured to determine that the shooting mode is a wide dynamic range shooting mode when a difference between the maximum light intensity and the minimum light intensity is greater than a preset light intensity difference;
the selection module is specifically configured to:
and determining the WDR camera as the target camera.
10. The apparatus of claim 6, further comprising:
the second determining module is used for determining the distance between a focusing point in the current shooting scene and the target camera;
and the processing module is used for processing the image shot by the target camera through a super-resolution algorithm when the distance between the focusing point and the target camera is greater than a preset distance, and taking the processed image as a shot image.
11. A multi-camera based image capture device, the multi-camera including a wide dynamic range, WDR, camera and a high-sensitivity camera, the device comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to the steps of any of the methods of claims 1-5.
12. A computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of any of the methods of claims 1-5.
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| CN114390199A (en) * | 2018-10-15 | 2022-04-22 | 华为技术有限公司 | Shooting method and electronic equipment |
| WO2020150974A1 (en) * | 2019-01-24 | 2020-07-30 | 深圳市大疆创新科技有限公司 | Photographing control method, mobile platform and storage medium |
| CN110049245A (en) * | 2019-04-22 | 2019-07-23 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN110213500B (en) * | 2019-06-17 | 2021-03-30 | 易诚高科（大连）科技有限公司 | Wide dynamic graph generation method for multi-lens shooting |
| CN110661970B (en) * | 2019-09-03 | 2021-08-24 | RealMe重庆移动通信有限公司 | Photographing method and device, storage medium and electronic equipment |
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