CN114554103A - Image capturing method, image capturing device and storage medium - Google Patents

Abstract

The present disclosure relates to an image capturing method, an image capturing apparatus, and a storage medium, the image capturing method including: determining a current distance scene based on the time-of-flight lattice distance, wherein the distance scene and a photometric mode have a corresponding relation; and determining a target light metering mode matched with the current distance scene, and shooting an image by adopting the target light metering mode. Through the embodiment of the disclosure, the distance scene is identified by using the time-of-flight lattice, the target light metering mode matched with the current distance scene is determined, and the image shooting is performed by using the target light metering mode, so that the dynamic adjustment of the light metering mode in the image shooting is realized, the light dimming quality is optimized, an ideal image exposure effect is achieved, and the user experience is improved.

Description

Image capturing method, image capturing device and storage medium

technical field

The present disclosure relates to the technical field of terminals, and in particular, to an image capturing method, an image capturing device, and a storage medium.

Background technique

With the development of electronic technology and the emergence of electronically controlled automatic light metering instruments, the tedious process of adjusting shutter speed and aperture during shooting has been improved. In order to obtain a better shooting effect, the light metering system of the shooting device measures the brightness of the light reflected by the object to be photographed, and selects different light metering methods to perform automatic light metering processing on the image according to different indoor and outdoor shooting scenes. For example, the photographing device provides metering methods such as spot metering, average metering, and center-weighted metering, and adjusts the metering value of the shooting screen according to the metering result, thereby obtaining a photo with better metering effect.

In the current technology, in the process of shooting light adjustment, a fixed light adjustment window is selected, that is, the entire image is selected as the light metering area for light metering. For the light metering and light metering of a specific scene, the exposure effect during shooting is not good, which cannot meet the shooting needs. .

SUMMARY OF THE INVENTION

In order to overcome the problems existing in the related art, the present disclosure provides an image capturing method, an image capturing device and a storage medium.

According to an aspect of the embodiments of the present disclosure, there is provided an image capturing method, comprising: determining a current distance scene based on a time-of-flight lattice distance, wherein there is a correspondence between the distance scene and a light metering method; determining to match the current distance The target metering method of the scene is adopted, and the image is photographed using the target metering method.

In one embodiment, the current distance scene includes a first distance scene, a second distance scene, or a third distance scene; and determining the current distance scene based on the time-of-flight lattice distance includes: if the time-of-flight lattice distance, If it is less than the first proportional threshold of the time-of-flight lattice limit ranging distance, it is determined that the current distance scene is the first distance scene; Two proportional thresholds, the current distance scene is determined to be the second distance scene; if the flight time lattice distance is greater than the first proportional threshold of the flight time lattice limit ranging distance, and less than the flight time lattice limit If the second proportional threshold of the ranging distance is determined, the current distance scene is determined to be the third distance scene; wherein the first proportional threshold is smaller than the second proportional threshold.

In one embodiment, the determining a target light metering method that matches the current distance scene includes at least one of the following: in the case that the current distance scene is the second distance scene, based on the distance distribution of all pixels in the image area Concentration degree, determine the local metering method or multi-point metering method as the target metering method; in the case where the current distance scene is the third distance scene, determine the degree of concentration based on the distance distribution of all pixels in the central area of the image. The central photometric mode or the partial photometric mode is the target photometric mode; when the current distance scene is the first distance scene, the central photometric mode is determined to be the target photometric mode.

In one embodiment, determining the local photometric mode or the multi-point photometric mode as the target photometric mode based on the concentration degree of the distance distribution of all pixels in the image area includes: when a first preset condition is satisfied, determining the local photometric mode or the multi-point photometric mode as the target photometric mode. The photometry mode is the target photometry mode, and the area corresponding to the pixels that meet the first preset condition is determined as the photometry area; when the first preset condition is not met, the multi-point photometry mode is determined to be the photometry area Target metering mode, the photometric area corresponding to the target photometry mode is the entire image area; wherein, the first preset condition includes: the ratio between the number of pixels within a preset distance range and the number of all pixels in the image area greater than the first preset ratio threshold.

In one embodiment, determining the central photometric mode or the local photometric mode as the target photometric mode based on the concentration degree of the distance distribution of all pixels in the central area of the image includes: when a second preset condition is satisfied, determining the central photometric mode or the local photometric mode. The photometric mode is the target photometric mode, and the photometric area corresponding to the target photometric mode is the central area of the image; when the second preset condition is not satisfied, the local photometric mode is determined to be the target photometric mode. The light mode; wherein the second preset condition includes: in the central area of the image, the ratio between the number of pixels and the number of all pixels in the image area is greater than a second preset ratio threshold.

In one embodiment, before using the target light metering method to capture the image, the method further includes: if the current distance scene is the first distance scene, and the current image zoom value is greater than the preset image zoom value threshold, based on The ratio of the current screen zoom value to the maximum zoom factor is used to adjust the metering area.

According to yet another aspect of the embodiments of the present disclosure, there is provided an image capturing device, the image capturing device comprising: a determination module configured to determine a current distance scene based on a time-of-flight lattice distance, wherein the distance between the scene and the light metering method is determined. There is a corresponding relationship between them, and a target light metering method matching the current distance scene is determined; an image capturing module is used to capture an image by using the target light metering method.

In one embodiment, the current distance scene includes a first distance scene, a second distance scene or a third distance scene; the determining module determines the current distance scene based on the flight time lattice distance in the following manner: if the flight If the time lattice distance is less than the first proportional threshold of the flight time lattice limit ranging distance, the current distance scene is determined to be the first distance scene; if the flight time lattice distance is greater than the flight time lattice limit The second proportional threshold of the ranging distance, then determine that the current distance scene is the second distance scene; if the flight time lattice distance is greater than the first proportional threshold of the flight time lattice limit ranging distance, and less than the If the second proportional threshold of the limit ranging distance of the time-of-flight lattice is determined, the current distance scene is determined to be the third distance scene; wherein the first proportional threshold is smaller than the second proportional threshold.

In one embodiment, the determining module determines the target light metering mode that matches the current distance scene in at least one of the following ways: in the case that the current distance scene is the second distance scene, based on all the pixels in the image area Concentration degree of distance distribution, determine the local metering method or multi-point metering method as the target metering method; when the current distance scene is the third distance scene, it is based on the distance distribution concentration degree of all pixels in the central area of the image , determine the central metering mode or the partial photometric mode as the target photometric mode; if the current distance scene is the first distance scene, determine the central photometric mode as the target photometric mode.

In one embodiment, the determining module determines the local photometric mode or the multi-point photometric mode as the target photometric mode based on the concentration degree of the distance distribution of all pixels in the image area in the following manner: when the first preset is satisfied When the conditions are met, the local metering method is determined to be the target metering method, and the area corresponding to the pixels satisfying the first preset condition is determined as the metering area; when the first preset condition is not met, the multi-point metering method is determined. The light mode is the target photometry mode, and the photometry area corresponding to the target photometry mode is the entire image area; wherein, the first preset condition includes: the number of pixels within a preset distance range and all pixels in the image area The ratio between the quantities is greater than the first preset ratio threshold.

In one embodiment, the determining module determines the central photometric mode or the local photometric mode as the target photometric mode based on the concentration degree of distance distribution of all pixels in the central area of the image in the following manner: when the second preset is satisfied: condition, determine that the central metering method is the target metering method, and the metering area corresponding to the target metering method is the central area; when the second preset condition is not satisfied, determine that the local metering method is The target light metering method; wherein the second preset condition includes: in the central area, the ratio between the number of pixels and the number of all pixels in the image area is greater than a second preset ratio threshold.

In one embodiment, the image capturing device further includes: an adjustment module configured to, when the current distance scene is the first distance scene and the current screen zoom value is greater than a preset screen zoom value threshold, based on the current screen zoom value The ratio of the maximum zoom factor to adjust the metering area.

According to yet another aspect of the embodiments of the present disclosure, there is provided an image capturing apparatus, including: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to: execute the image described in any one of the foregoing Shooting method.

According to yet another aspect of the embodiments of the present disclosure, a non-transitory computer-readable storage medium is provided, when instructions in the storage medium are executed by a processor of a mobile terminal, the mobile terminal can execute the image described in any one of the preceding items Shooting method.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: the dynamic adjustment of the light metering mode in image shooting is realized, the light adjustment quality is optimized, the ideal image exposure effect is achieved, and the user experience is improved.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a flowchart of an image capturing method according to an exemplary embodiment of the present disclosure.

FIG. 2 is a schematic diagram of a histogram obtained by statistics of pixel distances in a shooting scene according to an exemplary embodiment of the present disclosure.

FIG. 3 is a schematic diagram illustrating the relationship between a distance scene and a field of view according to an exemplary embodiment of the present disclosure.

FIG. 4 is a flowchart of an image capturing method according to another exemplary embodiment of the present disclosure.

FIG. 5 is a flowchart of an image capturing method according to another exemplary embodiment of the present disclosure.

FIG. 6 is a flowchart of an image capturing method according to another exemplary embodiment of the present disclosure.

FIG. 7 is a flowchart of an image capturing method according to another exemplary embodiment of the present disclosure.

8a-8d are schematic diagrams illustrating the relationship between the zoom degree and the photometric area according to an exemplary embodiment of the present disclosure.

Fig. 9 is a block diagram of an image capturing apparatus according to an exemplary embodiment of the present disclosure.

Fig. 10 is a block diagram of an image capturing apparatus according to another exemplary embodiment of the present disclosure.

FIG. 11 is a block diagram of an image capturing apparatus according to an exemplary embodiment of the present disclosure.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numerals in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as recited in the appended claims.

With the development of electronic technology and the emergence of electronically controlled automatic light metering instruments, the tedious process of adjusting shutter speed and aperture during shooting has been improved. In order to obtain a better shooting effect, the light metering system of the shooting device measures the brightness of the light reflected by the object to be photographed, and selects different light metering methods to perform automatic light metering processing on the image according to different indoor and outdoor shooting scenes. For example, the photographing device provides metering methods such as spot metering, average metering, and center-weighted metering, and adjusts the metering value of the shooting screen according to the metering result, thereby obtaining a photo with better metering effect.

Time-of-flight ranging is a non-contact ranging by the time-of-flight method, that is, by measuring the time that the near-infrared light is reflected to the sensor after encountering the object after being emitted, and with the constant speed of light, the distance between the sensor and the object is obtained. The ranging results are accurate and the anti-interference ability is strong.

In the current technology, in the process of shooting light adjustment, a fixed light adjustment window is selected, that is, the entire image is selected as the light metering area for light metering. For the light metering and light metering of a specific scene, the exposure effect during shooting is not good, which cannot meet the shooting needs. .

Thus, the present disclosure provides an image capturing method that identifies a distance scene, determines a photometric method matching the current distance scene, and uses the photometric method matching the current distance scene to perform photometry, thereby realizing dynamic adjustment of the photometric method.

FIG. 1 is a flowchart of an image capturing method according to an exemplary embodiment of the present disclosure. As shown in FIG. 1 , the image capturing method includes the following steps.

In step S101, a current distance scene is determined based on the time-of-flight lattice distance, wherein there is a corresponding relationship between the distance scene and the light metering method.

In step S102, a target light metering method matching the current distance scene is determined, and the target light metering method is used to capture an image.

In an embodiment of the present disclosure, the image capturing method is applied in the capturing process, and the time-of-flight lattice is set in the capturing device. Based on the time-of-flight lattice ranging, the actual position information of each pixel in the field of view can be obtained, and the time-of-flight lattice distance can be obtained. For example, the photosensitive chip of the time-of-flight ranging device can use an area array photosensitive chip to measure the position and depth information of the entire three-dimensional object surface, and obtain the surface geometric structure information of the entire scene of the shooting scene in real time. The time-of-flight lattice distance may be in a one-to-one correspondence with the actual position of each pixel in the field of view, that is, the time-of-flight lattice distance includes the distance between each pixel in the field and the photographing device.

Determine the metering method that matches the current distance scene, and use the metering method that matches the current distance scene for metering. The metering method can be partial metering, spot metering, central metering, etc. Different metering methods can correspond to different metering areas, that is, in the determined metering area, the metering method that matches the current distance scene is used for metering.

According to the embodiments of the present disclosure, the time-of-flight lattice is used to identify the distance scene, determine the photometric mode matching the current distance scene, and use the photometric mode matching the current distance scene to capture the image, thus realizing the dynamic photometry mode in the image capture. Adjust and optimize the dimming quality to achieve the ideal image exposure effect, thereby enhancing the user experience.

FIG. 2 is a schematic diagram of a histogram obtained by statistics of pixel distances in a shooting scene according to an exemplary embodiment of the present disclosure.

In an embodiment of the present disclosure, when calculating the distance of the time-of-flight lattice to determine the current distance scene, for example, the distance of each pixel point of the shooting object scene may be determined based on the time of flight, and in the histogram of the distance of each pixel point, The histogram represents the distance distribution of pixels in the scene. It may be a preset distance distribution threshold. In the histogram, determine the pixels in the shooting scene that are greater than the preset distance distribution threshold, and determine the average distance of the determined pixel points as the distance of the current scene. Based on the distance of the current scene, the current distance scene is determined. There is a correspondence between the distance scene and the metering method.

In an embodiment of the present disclosure, the current distance scene includes a first distance scene, a second distance scene, or a second distance scene.

The current distance scene is divided according to the limit ranging distance of the flight time, that is, if the flight time lattice distance is less than the first proportional threshold of the flight time lattice limit ranging distance, the current distance scene is determined as the first distance scene. Understandably, the limit ranging is the maximum limit value of the time-of-flight lattice, or the calibrated maximum value.

If the flight time lattice distance is greater than the second proportional threshold of the flight time lattice limit ranging distance, it is determined that the current distance scene is the second distance scene. The first proportional threshold is smaller than the second proportional threshold.

If the time-of-flight lattice distance is greater than the first proportional threshold of the time-of-flight lattice limit ranging distance, and less than the second proportional threshold of the time-of-flight lattice limit ranging distance, the current distance scene is determined to be the third distance scene.

For example, for the limit ranging distance of the flight time, the first proportional threshold is 5%, and the second proportional threshold is 30%, then the flight time lattice distance is less than 5% of the flight time lattice limit ranging distance, then the current distance is determined The scene is a first distance scene, and the first distance scene is a short distance scene. If the time-of-flight lattice distance is greater than 30% of the limit ranging distance of the time-of-flight lattice, it is determined that the current distance scene is the second distance scene, and the second distance scene is the long distance scene. If the flight time lattice distance is greater than 5% of the flight time lattice limit ranging distance and less than 30% of the flight time lattice limit distance, then the current distance scene is determined as the third distance scene, and the third distance scene is the middle distance scene. The first ratio threshold is 5% and the second ratio threshold is 30%. Adjustments can also be made according to the photographing device using telephoto, wide-angle, macro and other shooting modes to change the first ratio threshold and/or the second ratio threshold, thereby Change the division and judgment of long distance, medium distance and short distance.

FIG. 3 is a schematic diagram illustrating the relationship between a distance scene and a field of view according to an exemplary embodiment of the present disclosure. As shown in FIG. 3 , when a photographing device shoots a scene, the field of view changes with the change of the object distance, and a large field of view corresponds to The object distance of each object in the scene is different, and the object distance difference of objects in the scene corresponding to the small field of view is small. In FIG. 3 , the changes of the field of view at the long distance, the middle distance and the short distance are respectively shown from top to bottom. By determining different distance scenes, it provides a basis for the selection of metering methods.

FIG. 4 is a flowchart of an image capturing method according to another exemplary embodiment of the present disclosure. As shown in FIG. 4 , the image capturing method includes the following steps.

In step S201, a current distance scene is determined based on the time-of-flight lattice distance, wherein there is a corresponding relationship between the distance scene and the light metering method.

In step S202, in the case that the current distance scene is the second distance scene, the local metering method or the multi-point metering method is determined as the target metering method based on the concentration degree of distance distribution of all pixels in the image area.

In step S203, when the current distance scene is the third distance scene, the central or local light metering method is determined as the target light metering method based on the concentration degree of distance distribution of all pixels in the central area of the image.

In step S204, if the current distance scene is the first distance scene, it is determined that the central light metering method is the target light metering method.

In step S205, the target photometric mode is used to capture an image.

In this embodiment of the present disclosure, when the time-of-flight lattice distance is greater than the second proportional threshold of the time-of-flight lattice limit ranging distance, the current distance scene is determined to be the second distance scene, that is, the long-distance scene. The corresponding field of view in the long-distance scene is larger, then based on the concentration of the distance distribution of all pixels in the image area, the local metering method or the multi-point metering method is selected as the target metering method. When the distance distribution of all pixels in the image area is When concentrated, select the area where the distance distribution is concentrated as the metering area for local metering. When the distance distribution of all pixels in the image area is relatively uniform, select the multi-point metering method to make the selection of the metering method more accurate.

In the embodiment of the present disclosure, when the flight time distance of the flight time lattice is greater than the first proportional threshold of the flight time lattice limit ranging distance, and is smaller than the second proportional threshold of the flight time lattice limit ranging distance, then It is determined that the current distance scene is the third distance scene, that is, the middle distance scene. The corresponding field of view in the middle-distance scene is relatively moderate. Based on the concentration of the distance distribution of all pixels in the central area of the image, the central metering method or the local metering method is determined as the target metering method. If the distance distribution of all pixels in the central area is relatively concentrated, select the central metering method, otherwise select the local metering method. In the embodiment of the present disclosure, the central area of the image may be an area of a preset size formed by expanding outward in the image plane with the geometric center of the image as the center point.

In the embodiment of the present disclosure, when the time-of-flight lattice distance is less than the first proportional threshold of the limit-ranging distance of the time-of-flight lattice, the current distance scene is determined to be the first distance scene, that is, a close-range scene. The corresponding field of view in the close-up scene is small. In the short-range field of view, the central area metering method is determined as the target metering method.

According to an embodiment of the present disclosure, based on the time-of-flight lattice distance, it is determined that the current distance scene is a long-distance scene, a medium-distance scene or a short-distance scene, different target light metering methods matching the current distance scene are determined, and the determined target light metering method is adopted For image shooting, the dynamic adjustment of the metering method during the shooting process is realized, the light adjustment quality is optimized, and the ideal exposure effect is achieved.

FIG. 5 is a flowchart of an image capturing method according to another exemplary embodiment of the present disclosure. As shown in FIG. 5 , the image capturing method includes the following steps.

In step S301, a current distance scene is determined based on the time-of-flight lattice distance, wherein there is a corresponding relationship between the distance scene and the light metering method.

In step S302, if the current distance scene is the second distance scene, when the first preset condition is satisfied, the local metering method is determined as the target metering method, and the area corresponding to the pixels satisfying the first preset condition is determined as Metering area.

In step S303, if the current distance scene is the second distance scene, when the first preset condition is not satisfied, the multi-point metering mode is determined as the target photometry mode, and the photometry area corresponding to the target photometry mode is the entire image area.

In step S304, the target photometric method is used to capture an image.

In the embodiment of the present disclosure, the first preset condition includes: a ratio between the number of pixels within the preset distance range and the number of all pixels in the image area is greater than a first preset ratio threshold. That is, the number of pixels greater than the first preset ratio threshold of the total number of pixels in the image area, and the pixels within the preset distance range, should fall in the area where the light metering is performed.

When the flight time lattice distance is greater than the second proportional threshold of the flight time lattice limit ranging distance, it is determined that the current distance scene is the second distance scene, that is, the long distance scene. If the corresponding field of view in the long-distance scene is larger, then based on the concentration of the distance distribution of all pixels in the image area, the local metering method or the multi-point metering method is selected as the target metering method.

Within the preset distance range, the ratio between the number of pixels and the total number of pixels in the image area is greater than the first preset ratio threshold. At this time, the distribution of pixels within the preset distance range is concentrated, that is, when the first preset condition is satisfied, select The area where the distance distribution is concentrated is used as the metering area for local metering. When the first preset condition is not met in the image, that is, when the distance distribution of all pixels in the image area is relatively uniform, when the first preset condition is not met, the entire image area is selected for multi-point metering, so that the metering method selection is more accurate.

According to the embodiments of the present disclosure, based on the time-of-flight lattice distance, it is determined that the current distance scene is a long-distance scene, different target metering methods that match the long-distance scene are determined, and the determined target metering method is used for image shooting, thereby realizing the shooting process. The dynamic adjustment of the middle metering mode optimizes the dimming quality and achieves the ideal exposure effect.

FIG. 6 is a flowchart of an image capturing method according to another exemplary embodiment of the present disclosure. As shown in FIG. 6 , the image capturing method includes the following steps.

In step S401, a current distance scene is determined based on the time-of-flight lattice distance, wherein there is a corresponding relationship between the distance scene and the light metering method.

In step S402, if the current distance scene is the third distance scene, when the second preset condition is satisfied, it is determined that the central light metering method is the target light metering method, and the light metering area corresponding to the target light metering method is the image center area.

In step S403, if the current distance scene is the third distance scene, when the second preset condition is not satisfied, it is determined that the local light metering method is the target light metering method.

In step S404, the target photometric method is used to capture an image.

In the embodiment of the present disclosure, the second preset condition includes: in the central area of the image, the ratio between the number of pixels and the number of all pixels in the image area is greater than the second preset ratio threshold. If the flight time distance of the flight time lattice is greater than the first proportional threshold of the flight time lattice limit ranging distance and less than the second proportional threshold of the flight time lattice limit ranging distance, the current distance scene is determined as the third distance scene , which is a mid-range scene. The corresponding field of view in the middle-distance scene is relatively moderate. Based on the concentration of the distance distribution of all pixels in the central area of the image, the central metering method or the local metering method is determined as the target metering method. If the distance distribution of all pixels in the central area of the image is relatively concentrated, select the central metering method, otherwise select the local metering method. In the central area of the image, when the ratio between the number of pixels and the number of all pixels in the image area is greater than the second preset ratio threshold, the distance distribution of all the pixels is relatively concentrated. The image is captured using the center metering method as the target metering method in the central area of the image.

In the central area of the image, when the ratio between the number of pixels and the number of all pixels in the image area is less than the second preset ratio threshold, the distance distribution of all pixels is relatively uniform and dispersed, and the local metering method is determined as the target metering method. It is possible to perform local metering within the distribution range of all pixels to capture images.

According to the embodiments of the present disclosure, based on the time-of-flight lattice distance, it is determined that the current distance scene is a middle-distance scene, different target photometry modes matching the middle-distance scene are determined, and the determined target photometry mode is used to capture images, thereby realizing the capture process. The dynamic adjustment of the middle metering mode optimizes the dimming quality and achieves the ideal exposure effect.

FIG. 7 is a flowchart of an image capturing method according to another exemplary embodiment of the present disclosure. As shown in FIG. 7 , the image capturing method includes the following steps.

In step S501, a current distance scene is determined based on the time-of-flight lattice distance, wherein there is a corresponding relationship between the distance scene and the light metering method.

In step S502, if the current distance scene is the first distance scene, the central metering method is determined as the target metering method, and if the current image zoom value is greater than the preset image zoom value threshold, the current image zoom value and the maximum zoom value are determined based on the current image zoom value and the maximum zoom value. The ratio of multiples to adjust the metering area.

In step S503, the target photometric method is used to capture an image.

In the embodiment of the present disclosure, when the time-of-flight lattice distance is less than the first proportional threshold of the limit-ranging distance of the time-of-flight lattice, the current distance scene is determined to be the first distance scene, that is, a close-range scene. The corresponding field of view in the close-up scene is small. In the close-up field of view, the central metering method is determined as the target metering method.

8a-8d are schematic diagrams illustrating the relationship between the zoom degree and the photometric area according to an exemplary embodiment of the present disclosure. When the screen is zoomed to a larger degree, it is equivalent to a correspondingly smaller field of view, so the metering area should be expanded accordingly. 8a-8d, the zoom degree corresponding to FIG. 8a is greater than that of FIG. 8b, the boxes in the depth of field diagrams in FIGS. 8a and 8b represent the actual field of view, and the solid line boxes in FIGS. 8c and 8d, respectively Corresponding to the boxes representing the actual field of view in FIGS. 8 a and 8 b , and the dotted boxes correspond to the photometric areas after adjustment based on the zooming degrees of the images in FIGS. 8 a and 8 b .

In this embodiment of the present disclosure, in the case of a close-range scene, the central metering method is selected, and if the current image zoom value exceeds the image zoom value threshold, the metering area is adjusted based on the ratio of the current image zoom value to the maximum zoom factor. For example, the central area may be the center and may be expanded according to a set ratio.

In an example, the preset image zoom value threshold is 5X, and the maximum zoom factor is 50X. During the current shooting process, the image zoom value is 7X, which exceeds the preset image zoom value threshold. In order to make the metering more accurate, it is necessary to Adjust the metering area, that is, expand the metering area to obtain more picture information. The metering area can be dynamically expanded according to the following formula.

ROI_region'=ROI_region*(0.95+roi_thred/max_crop)

In the formula, ROI_region' is the expanded photometric area, ROI_region is the original photometric area without image scaling, roi_thred is the current image zoom value, and max_crop is the maximum zoom multiple of the current image zoom value. It can be understood that, in the above formula, 0.95 can be adjusted according to the parameters of the image capturing device.

According to the embodiment of the present disclosure, based on the time-of-flight lattice distance, it is determined that the current distance scene is the first distance scene, that is, the close-range scene, the central metering method is determined to be the metering method that matches the current distance scene, and there is a large zoom in the picture. When the dimming area is adjusted dynamically, the central metering is performed based on the adjusted metering area, which further improves the reasonable exposure effect in the scene of close-up field of view.

Based on the same concept, an embodiment of the present disclosure also provides an image capturing apparatus.

It can be understood that, in order to realize the above-mentioned functions, the image capturing apparatus provided by the embodiments of the present disclosure includes corresponding hardware structures and/or software modules for executing each function. Combining with the units and algorithm steps of each example disclosed in the embodiments of the present disclosure, the embodiments of the present disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solutions of the embodiments of the present disclosure.

FIG. 9 is a block diagram of an image capturing apparatus according to an exemplary embodiment of the present disclosure. Referring to FIG. 9 , the image capturing apparatus 100 includes a determination module 101 and an image capturing module 102 .

The determining module 101 determines a current distance scene based on the time-of-flight lattice distance, wherein there is a corresponding relationship between the distance scene and the photometric mode, and determines a target photometric mode matching the current distance scene.

The image capturing module 102 is used for capturing an image in a target light metering manner.

In one embodiment, the current distance scene includes a first distance scene, a second distance scene or a third distance scene; the determining module 101 determines the current distance scene based on the time-of-flight lattice distance in the following manner: if the time-of-flight lattice distance, If it is less than the first proportional threshold of the time-of-flight lattice limit ranging distance, it is determined that the current distance scene is the first distance scene; if the flight-time lattice distance is greater than the second proportional threshold of the time-of-flight lattice limit ranging distance, it is determined that the current distance scene is the first distance scene; The current distance scene is the second distance scene; if the time-of-flight lattice distance is greater than the first proportional threshold of the time-of-flight lattice limit ranging distance, and less than the second proportional threshold of the time-of-flight lattice limit ranging distance, the current distance is determined. The distance scene is a third distance scene; wherein the first proportional threshold is smaller than the second proportional threshold.

In one embodiment, the determining module 101 determines the target light metering method that matches the current distance scene in the following manner: if the current distance scene is the second distance scene, the local light metering method is determined based on the concentration degree of the distance distribution of all pixels in the image area. If the current distance scene is the third distance scene, then based on the concentration of the distance distribution of all pixels in the central area of the image, the central or local metering method is determined as the target metering method. metering method; or if the current distance scene is the first distance scene, determine the central metering method as the target metering method.

In one embodiment, the determining module 101 adopts the following method to determine the local metering method or the multi-point metering method as the target metering method based on the concentration degree of the distance distribution of all pixels in the image area: when the first preset condition is satisfied, It is determined that the local metering method is the target metering method, and the area corresponding to the pixels that satisfy the first preset condition is determined as the metering area; when the first preset condition is not satisfied, the multi-point metering method is determined to be the target metering method. In the light mode, the photometric area corresponding to the target photometric mode is the entire image area; wherein, the first preset condition includes: the ratio between the number of pixels within the preset distance range and the number of all pixels in the image area is greater than the first preset ratio threshold.

In one embodiment, the determining module 101 adopts the following method to determine the central photometric mode or the local photometric mode as the target photometric mode based on the concentration degree of the distance distribution of all pixels in the central area of the image: when the second preset condition is satisfied, It is determined that the central light metering method is the target light metering method, and the light metering area corresponding to the target light metering method is the central area of the image; when the second preset condition is not satisfied, the local light metering method is determined to be the target light metering method; wherein, the third The second preset condition includes: in the central area of the image, the ratio between the number of pixels and the number of all pixels in the image area is greater than the second preset ratio threshold.

FIG. 10 is a block diagram of an image capturing apparatus according to an exemplary embodiment. Referring to FIG. 10 , the image capturing apparatus 100 further includes an adjustment module 103 .

The adjustment module 103 is used to adjust the photometric area based on the ratio of the current image zoom value to the maximum zoom factor when the current distance scene is the first distance scene and the current image zoom value is greater than the preset image zoom value threshold.

Regarding the apparatus in the above-mentioned embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be described in detail here.

FIG. 11 is a block diagram of an image capturing apparatus 800 according to an exemplary embodiment. For example, apparatus 800 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, and the like.

11, the apparatus 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and communication component 816.

The processing component 802 generally controls the overall operation of the device 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or some of the steps of the methods described above. Additionally, processing component 802 may include one or more modules that facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

Memory 804 is configured to store various types of data to support operations at device 800 . Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and the like. Memory 804 may be implemented by any type of volatile or non-volatile storage device or combination thereof, 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 Disk or Optical Disk.

Power component 806 provides power to various components of device 800 . Power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to device 800 .

Multimedia component 808 includes a screen that provides an output interface between the device 800 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 input signals from a user. The touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. The touch sensor may not only sense the boundaries of a touch or swipe action, but also detect the duration and pressure associated with the touch or swipe action. In some embodiments, the multimedia component 808 includes a front-facing camera and/or a rear-facing camera. When the apparatus 800 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each of the front and rear cameras can be a fixed optical lens system or have focal length and optical zoom capability.

Audio component 810 is configured to output and/or input audio signals. For example, audio component 810 includes a microphone (MIC) that is configured to receive external audio signals when device 800 is in operating modes, such as call mode, recording mode, and voice recognition mode. The received audio signal may be further stored in memory 804 or transmitted via communication component 816 . In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and a peripheral interface module, which may be a keyboard, a click wheel, a button, or the like. These buttons may include, but are not limited to: home button, volume buttons, start button, and lock button.

Sensor assembly 814 includes one or more sensors for providing status assessment of various aspects of device 800 . For example, the sensor assembly 814 can detect the open/closed state of the device 800, the relative positioning of the components, such as the display and keypad of the device 800, the sensor assembly 814 can also detect a change in the position of the device 800 or a component of the device 800, the user The presence or absence of contact with the device 800, the orientation or acceleration/deceleration of the device 800 and the temperature change of the device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. Sensor assembly 814 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 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communication component 816 is configured to facilitate wired or wireless communication between apparatus 800 and other devices. Device 800 may access wireless networks based on communication standards, such as WiFi, 2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra Wide Band (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, apparatus 800 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 A gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation is used to perform the above method.

In an exemplary embodiment, there is also provided a non-transitory computer-readable storage medium including instructions, such as a memory 804 including instructions, executable by the processor 820 of the apparatus 800 to perform the method described above. For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.

It should be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects are an "or" relationship. The singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

It is further understood that the terms "first", "second", etc. are used to describe various information, but the information should not be limited to these terms. These terms are only used to distinguish the same type of information from one another, and do not imply a particular order or level of importance. In fact, the expressions "first", "second" etc. are used completely interchangeably. For example, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information, without departing from the scope of the present disclosure.

It should be further understood that, unless otherwise specified, "connection" includes a direct connection between the two without other components, and also includes an indirect connection between the two with other elements.

It is further to be understood that, although the operations in the embodiments of the present disclosure are described in a specific order in the drawings, it should not be construed as requiring that the operations be performed in the specific order shown or the serial order, or requiring Perform all operations shown to obtain the desired result. In certain circumstances, multitasking and parallel processing may be advantageous.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (14)

1. An image capturing method, wherein the image capturing method comprises: Determine the current distance scene based on the time-of-flight lattice distance, wherein there is a corresponding relationship between the distance scene and the metering method; A target light metering method matching the current distance scene is determined, and the target light metering method is used to capture an image. 2. The image capturing method according to claim 1, wherein the current distance scene comprises a first distance scene, a second distance scene or a third distance scene; Based on the time-of-flight lattice distance, determine the current distance scene, including: If the time-of-flight lattice distance is less than the first proportional threshold of the limit-ranging distance of the time-of-flight lattice, then determine that the current distance scene is the first distance scene; If the time-of-flight lattice distance is greater than the second proportional threshold of the limit-ranging distance of the time-of-flight lattice, it is determined that the current distance scene is the second distance scene; If the time-of-flight lattice distance is greater than the first proportional threshold of the time-of-flight lattice limit ranging distance and smaller than the second proportional threshold of the flight-time lattice limit distance, the current distance scenario is determined as The third distance scene; Wherein, the first proportional threshold is smaller than the second proportional threshold. 3. The image capturing method according to claim 1 or 2, wherein the determining a target light metering method matching the current distance scene comprises at least one of the following: In the case that the current distance scene is the second distance scene, the local metering method or the multi-point metering method is determined as the target metering method based on the concentration of distance distribution of all pixels in the image area; In the case where the current distance scene is the third distance scene, the central metering method or the local metering method is determined as the target metering method based on the concentration degree of distance distribution of all pixels in the central area of the image; In the case that the current distance scene is the first distance scene, it is determined that the central light metering method is the target light metering method. 4 . The image capturing method according to claim 3 , wherein, based on the concentration degree of distance distribution of all pixels in the image area, determining a local photometric mode or a multi-point photometric mode as the target photometric mode, comprising: 5 . When the first preset condition is met, determine the local metering mode as the target photometric mode, and determine the area corresponding to the pixel satisfying the first preset condition as the photometric area; When the first preset condition is not met, the multi-point metering mode is determined as the target photometry mode, and the photometry area corresponding to the target photometry mode is the entire image area; Wherein, the first preset condition includes: a ratio between the number of pixels within the preset distance range and the number of all pixels in the image area is greater than a first preset ratio threshold. 5 . The image capturing method according to claim 3 , wherein, based on the concentration degree of distance distribution of all pixels in the central area of the image, determining a central photometric mode or a local photometric mode as the target photometric mode, comprising: 6 . When the second preset condition is satisfied, determining that the central photometric mode is the target photometric mode, and the photometric area corresponding to the target photometric mode is the image central area; When the second preset condition is not met, determining that the local metering method is the target metering method; Wherein, the second preset condition includes: in the central area of the image, the ratio between the number of pixels and the number of all pixels in the image area is greater than a second preset ratio threshold. 6 . The image capturing method according to claim 3 , wherein, before using the target light metering method to capture an image, the method further comprises: 6 . If the current distance scene is the first distance scene, and the current image zoom value is greater than the preset image zoom value threshold, the metering area is adjusted based on the ratio of the current image zoom value to the maximum zoom factor. 7. An image capturing device, wherein the image capturing device comprises: A determination module, configured to determine the current distance scene based on the time-of-flight lattice distance, wherein there is a correspondence between the distance scene and the photometric mode, and determine the target photometric mode that matches the current distance scene; The image capturing module is used for capturing an image by adopting the target light metering method. 8. The image capturing device according to claim 7, wherein the current distance scene comprises a first distance scene, a second distance scene or a third distance scene; The determining module determines the current distance scene based on the time-of-flight lattice distance in the following manner: If the time-of-flight lattice distance is less than the first proportional threshold of the limit-ranging distance of the time-of-flight lattice, then determine that the current distance scene is the first distance scene; If the time-of-flight lattice distance is greater than the second proportional threshold of the limit-ranging distance of the time-of-flight lattice, it is determined that the current distance scene is the second distance scene; If the time-of-flight lattice distance is greater than the first proportional threshold of the time-of-flight lattice limit ranging distance and smaller than the second proportional threshold of the flight-time lattice limit distance, the current distance scenario is determined as The third distance scene; Wherein, the first proportional threshold is smaller than the second proportional threshold. 9. The image capturing device according to claim 7 or 8, wherein the determining module adopts at least one of the following methods to determine a target light metering method matching the current distance scene: In the case where the current distance scene is the second distance scene, the local metering method or the multi-point metering method is determined to be the target metering method based on the concentration of the distance distribution of all pixels in the image area; or In the case where the current distance scene is the third distance scene, the central metering method or the local metering method is determined as the target metering method based on the concentration of the distance distribution of all pixels in the central area of the image; or In the case that the current distance scene is the first distance scene, it is determined that the central light metering method is the target light metering method. 10 . The image capturing device according to claim 9 , wherein the determining module adopts the following method to determine the local metering method or the multi-point metering method based on the concentration degree of the distance distribution of all pixels in the image area. 11 . Target metering method: When the first preset condition is met, determine the local metering mode as the target photometric mode, and determine the area corresponding to the pixel satisfying the first preset condition as the photometric area; When the first preset condition is not satisfied, the multi-point metering mode is determined as the target photometry mode, and the photometry area corresponding to the target photometry mode is the entire image area; Wherein, the first preset condition includes: a ratio between the number of pixels within the preset distance range and the number of all pixels in the image area is greater than a first preset ratio threshold. 11 . The image capturing device according to claim 9 , wherein the determination module adopts the following method to determine the central photometric mode or the local photometric mode as the said 11 . Target metering method: When the second preset condition is satisfied, determining that the central photometric mode is the target photometric mode, and the photometric area corresponding to the target photometric mode is the image central area; When the second preset condition is not met, determining that the local metering method is the target metering method; Wherein, the second preset condition includes: in the central area of the image, the ratio between the number of pixels and the number of all pixels in the image area is greater than a second preset ratio threshold. 12. The image capturing device according to claim 9, wherein the image capturing device further comprises: The adjustment module is used to adjust the light metering area based on the ratio of the current image zoom value to the maximum zoom factor when the current distance scene is the first distance scene and the current image zoom value is greater than the preset image zoom value threshold. 13. An image capturing device, comprising: processor; memory for storing processor-executable instructions; Wherein, the processor is configured to: execute the image capturing method of any one of claims 1 to 6. 14. A non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by a processor of a mobile terminal, the mobile terminal can execute the image capturing method according to any one of claims 1 to 6 .

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