CN114363524A - Backlight control method, device, equipment and storage medium - Google Patents
Backlight control method, device, equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the application provides a backlight control method, a device, equipment and a storage medium, which belong to the technical field of exposure imaging, and the method comprises the following steps: determining an image exposure manner and a target light emitting sequence of the plurality of light emitting units in response to a photographing instruction; the image exposure mode is a line-by-line exposure mode, and the target light-emitting sequence is different from the arrangement sequence of the plurality of light-emitting units; and carrying out image exposure according to the image exposure mode, and controlling the plurality of light-emitting units to emit light according to the target light-emitting sequence so as to realize image shooting. Moire can not appear in the image, has improved the quality of image.
Description
Technical Field
The present disclosure relates to the field of exposure imaging technologies, and in particular, to a backlight control method, apparatus, device, and storage medium.
Background
The image pickup apparatus may include a rolling shutter and a backlight light source. The rolling shutter is a mechanism used by the image pickup apparatus to control the effective exposure time of the photosensitive film, and the backlight source can illuminate the image target area of the image pickup apparatus.
In the process of image shooting, the rolling shutter can be used for exposing line by scanning line by line through the sensor until all pixel points are exposed. During exposure, the backlight source may illuminate the imaging target area line by line. If the frame frequency of the backlight light source emitting light is not consistent with the exposure frame frequency of the rolling shutter, optical interference can be generated between the backlight light source and the rolling shutter, moire fringes appear in the finally shot image, and the image quality is low.
Disclosure of Invention
The application relates to a backlight control method, a backlight control device, backlight control equipment and a storage medium, and improves the quality of images.
In a first aspect, an embodiment of the present application provides a backlight control method, including:
determining an image exposure manner and a target light emitting sequence of the plurality of light emitting units in response to a photographing instruction; the image exposure mode is a line-by-line exposure mode, and the target light-emitting sequence is different from the arrangement sequence of the plurality of light-emitting units;
and carrying out image exposure according to the image exposure mode, and controlling the plurality of light-emitting units to emit light according to the target light-emitting sequence so as to realize image shooting.
In one possible embodiment, determining the target light emitting order of the plurality of light emitting units comprises:
determining a preset light emitting sequence as the target light emitting sequence; alternatively, the first and second electrodes may be,
and randomly generating the target light-emitting sequence.
In one possible embodiment, the plurality of light emitting cells includes N rows of light emitting cells; randomly generating the target lighting order, comprising:
and randomly arranging the line numbers of the N lines of light-emitting units to generate the target light-emitting sequence, wherein the target light-emitting sequence is used for indicating the light-emitting sequence of the N lines of light-emitting units, the target light-emitting sequence comprises N line numbers, and N is an integer greater than 1.
In one possible embodiment, controlling the plurality of light emitting units to emit light according to the target light emitting sequence includes:
in the ith light-emitting period, acquiring the ith line number in the target light-emitting sequence, and controlling a line of light-emitting units corresponding to the ith line number to emit light;
wherein, the i is 1, 2, … … and N in sequence.
In one possible embodiment, the plurality of light emitting cells includes M × K light emitting cells; randomly generating the target lighting order, comprising:
determining M groups of light-emitting units, wherein each group of light-emitting units comprises K light-emitting units, the K light-emitting units are respectively positioned in different columns, and M and K are respectively integers greater than 1;
and determining the sequence of the M groups of light-emitting units as the target light-emitting sequence.
In one possible embodiment, the determining the ith group of light-emitting units for any ith group of light-emitting units includes:
if the i is 1, randomly selecting one light-emitting unit in each row respectively to obtain a 1 st group of light-emitting units;
if i is larger than 1, respectively determining the rest light-emitting units in each row of light-emitting units, and respectively randomly selecting one light-emitting unit from the rest light-emitting units in each row of light-emitting units to obtain the ith group of light-emitting units; the remaining light emitting cells of the jth column of light emitting cells are not included in the first i-1 group of light emitting cells.
In one possible embodiment, controlling the plurality of light emitting units to emit light according to the target light emitting sequence includes:
controlling the ith group of light-emitting units to emit light in the ith light-emitting period;
wherein, the i is 1, 2, … … and M in sequence.
In a second aspect, an embodiment of the present application provides a backlight control apparatus, which is applied to an image capturing device including a plurality of light emitting units arranged in sequence, including a determination module and a control module, wherein,
the determining module is used for responding to a shooting instruction and determining an image exposure mode and a target light-emitting sequence of the plurality of light-emitting units; the image exposure mode is a line-by-line exposure mode, and the target light-emitting sequence is different from the arrangement sequence of the plurality of light-emitting units;
the control module is used for carrying out image exposure according to the image exposure mode and controlling the plurality of light-emitting units to emit light according to the target light-emitting sequence so as to realize image shooting.
In a possible implementation, the determining module is specifically configured to:
determining a preset light emitting sequence as the target light emitting sequence; alternatively, the first and second electrodes may be,
and randomly generating the target light-emitting sequence.
In a possible implementation manner, the plurality of light emitting units includes N rows of light emitting units, and the determining module is specifically configured to:
and randomly arranging the line numbers of the N lines of light-emitting units to generate the target light-emitting sequence, wherein the target light-emitting sequence is used for indicating the light-emitting sequence of the N lines of light-emitting units, the target light-emitting sequence comprises N line numbers, and N is an integer greater than 1.
In a possible implementation, the control module is specifically configured to:
in the ith light-emitting period, acquiring the ith line number in the target light-emitting sequence, and controlling a line of light-emitting units corresponding to the ith line number to emit light;
wherein, the i is 1, 2, … … and N in sequence.
In a possible embodiment, the plurality of light-emitting units includes M × K light-emitting units, and the determining module is configured to:
determining M groups of light-emitting units, wherein each group of light-emitting units comprises K light-emitting units, the K light-emitting units are respectively positioned in different columns, and M and K are respectively integers greater than 1;
and determining the sequence of the M groups of light-emitting units as the target light-emitting sequence.
In one possible embodiment, the determining module is configured to:
if the i is 1, randomly selecting one light-emitting unit in each row respectively to obtain a 1 st group of light-emitting units;
if i is larger than 1, respectively determining the rest light-emitting units in each row of light-emitting units, and respectively randomly selecting one light-emitting unit from the rest light-emitting units in each row of light-emitting units to obtain the ith group of light-emitting units; the remaining light emitting cells of the jth column of light emitting cells are not included in the first i-1 group of light emitting cells.
In one possible embodiment, the control module is configured to:
controlling the ith group of light-emitting units to emit light in the ith light-emitting period;
wherein, the i is 1, 2, … … and M in sequence.
In a third aspect, an embodiment of the present application provides a backlight control device, including a processor, a memory;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored by the memory, causing the processor to perform the backlight control method of any one of the first aspect.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the computer-readable storage medium is configured to implement the backlight control method according to any one of the first aspect.
In a fifth aspect, the present application provides a computer program product, which includes a computer program that, when executed by a processor, implements the backlight control method according to any one of the first aspect.
The embodiment of the application provides a backlight control method, a device, equipment and a storage medium, when image shooting is carried out, the image shooting equipment responds to a shooting instruction and determines an image exposure mode and a target light emitting sequence of a plurality of light emitting units, wherein the image exposure mode is a line-by-line exposure mode, and the target light emitting sequence is different from the arrangement sequence of the plurality of light emitting units; after determining the image exposure mode and the target light-emitting sequence of the plurality of light-emitting units, the image capturing apparatus performs image exposure according to the image exposure mode and controls the plurality of light-emitting units to emit light according to the target light-emitting sequence to achieve image capturing. By changing the light emitting sequence of the plurality of light emitting units, the periodicity of the light emitting of the backlight light source is reduced, even the periodicity of the light emitting of the backlight light source is completely eliminated, the optical interference caused by the inconsistency of the light emitting frame frequency of the backlight light source and the exposure frame frequency of the rolling shutter is avoided, Moire can not appear in the finally shot image, and the quality of the image is improved.
Drawings
Fig. 1 is a schematic view of an application scenario provided in an embodiment of the present application;
fig. 2A is a schematic view of an exposure pattern of a rolling shutter in the image pickup apparatus;
fig. 2B is a diagram illustrating a light emission pattern of a backlight light source of an image pickup apparatus in the related art;
fig. 3 is a first flowchart illustrating a backlight control method according to an embodiment of the present disclosure;
fig. 4 is a second flowchart illustrating a backlight control method according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram illustrating a light emitting sequence of a plurality of light emitting units according to an embodiment of the present application;
fig. 6 is a third schematic flowchart of a backlight control method according to an embodiment of the present application;
fig. 7 is a schematic diagram illustrating a target light emitting sequence of M × K light emitting cells according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a backlight control device according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a backlight control device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are some but not all of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For ease of understanding, an application scenario to which the embodiment of the present application is applied is described below with reference to fig. 1.
Fig. 1 is a schematic view of an application scenario provided in an embodiment of the present application. Referring to fig. 1, the image pickup apparatus may include a rolling shutter 101 and a backlight light source 102. The rolling shutter 101 may control an effective exposure time of the photosensitive sheet, and the backlight light source 102 may illuminate an imaging target area of the image pickup apparatus.
When an image is shot, the rolling shutter 101 can perform line-by-line scanning and line-by-line exposure through the sensor until all pixel points are exposed; during exposure, the backlight source 102 may randomly illuminate the imaging target area.
For ease of understanding, the exposure method of the rolling shutter 101 will be described below with reference to fig. 2A.
Fig. 2A is a schematic diagram of an exposure manner of a rolling shutter in the image pickup apparatus. Referring to fig. 2A, it is assumed that the photographed image includes 5 rows of pixel lines. In the image capturing process, the exposure sequence of the pixel rows is 1 st row, 2 nd row, 3 rd row, 4 th row and 5 th row. The exposure time of the pixels in different rows is different, the exposure time of the pixels in the 1 st row is earlier than that of the pixels in the 2 nd row, the exposure time of the pixels in the 2 nd row is earlier than that of the pixels in the 3 rd row, the exposure time of the pixels in the 3 rd row is earlier than that of the pixels in the 4 th row, and the exposure time of the pixels in the 4 th row is earlier than that of the pixels in the 5 th row. After the exposure of each row of pixels is completed, the imaging data of each row of pixels can be read by the camera equipment, and finally, the imaging data of 5 rows of pixels are combined to obtain the imaging data of a complete image.
In the related art, the backlight light source illuminates the imaging target area line by line during exposure. For easy understanding, the light emitting manner of the backlight source in the related art is described below with reference to fig. 2B.
Fig. 2B is a schematic diagram of a lighting manner of a backlight light source of the image pickup apparatus in the related art. Referring to fig. 2B, it is assumed that the photographed image includes 4 lines and the backlight light sources are divided into 5 lines. In the image capturing process, in the 1 st lighting period, the 1 st line in the image is exposed, and the 1 st line of the backlight light source is lighted, so that the light source can be provided for the 1 st line in the image. In the 2 nd lighting period, the 2 nd line in the image is exposed, the 2 nd line of the backlight light source is lighted, and the light source can be provided for the 2 nd line in the image. In the 3 rd lighting period, the 3 rd line in the image is exposed, the 3 rd line of the backlight light source is lighted, and the light source can be provided for the 3 rd line in the image. In the 4 th lighting period, the 4 th line in the image is exposed, the 4 th line of the backlight light source is lighted, and the light source can be provided for the 4 th line in the image. In the 5 th lighting period, no line in the image needs to be exposed, and the 5 th line of the backlight source lights.
The frame rate of the backlight light source may refer to an inverse number of a light emitting period of the backlight light source. The exposure frame rate of the rolling shutter may refer to the inverse of the one-time exposure time length of one frame image. If the frame frequency of the backlight light source emitting light is not consistent with the exposure frame frequency of the rolling shutter, if the backlight light source emits light periodically, optical interference can be generated between the backlight light source and the rolling shutter, Moire fringes appear in the finally shot image, and the quality of the image is reduced.
In order to solve the technical problem, in the embodiment of the application, the periodicity of the light emitting sequence of the backlight light source can be reduced or even completely eliminated by changing the light emitting mode of the backlight light source, so that optical interference caused by the fact that the light emitting frame frequency of the backlight light source is not consistent with the exposure frame frequency of the rolling shutter is avoided, moire fringes do not appear in the finally shot image, and the quality of the image is improved.
The technical means shown in the present application will be described in detail below with reference to specific examples. It should be noted that the following embodiments may exist independently or may be combined with each other, and the description of the same or displayed contents is not repeated in different embodiments.
Fig. 3 is a first flowchart illustrating a backlight control method according to an embodiment of the present disclosure. Referring to fig. 3, the method may include:
s301, in response to a shooting instruction, determining an image exposure mode and a target light emitting sequence of a plurality of light emitting units.
The execution main body of the embodiment of the application can be the image pickup device, and can also be an image pickup device arranged in the image pickup device, and the image pickup device can be realized by software, and can also be realized by the combination of software and hardware.
In the image pickup apparatus or the image pickup device, a plurality of light emitting units may be included which are sequentially arranged.
The light emitting unit may be a backlight light source in the image pickup apparatus.
The light emitting unit may be a light-emitting diode (LED) unit, and one light emitting unit may include a plurality of LED light sources.
The image exposure mode may be a line-by-line exposure mode.
The target light emitting order may be different from an arrangement order of the plurality of light emitting cells.
For example, the arrangement order of the N light emitting cells may be 1, 2, 3, … …, N, and the target light emitting order of the N light emitting cells may be 3, 7, 1, N, … …, 2.
The target light emitting order of the plurality of light emitting units may be determined by:
determining a preset light-emitting sequence as a target light-emitting sequence; alternatively, the target light emission order is randomly generated.
The preset light emission sequence may be the same as or different from the randomly generated light emission sequence.
S302, image exposure is carried out according to the image exposure mode, and the plurality of light-emitting units are controlled to emit light according to the target light-emitting sequence, so that image shooting is realized.
The plurality of light emitting units may be controlled to emit light by the LED driver and the target light emitting sequence.
When image shooting is carried out, each frame of image can adopt the same target light-emitting sequence to control the light-emitting units to emit light; the plurality of light emitting units can be controlled to emit light by adopting different target light emitting sequences for each frame image.
For example, if the target light-emitting sequence corresponding to each frame image is the preset light-emitting sequence, each frame image adopts the same target light-emitting sequence. And if the target generation sequence corresponding to each frame of image is randomly generated, each frame of image adopts a different target light-emitting sequence.
In the embodiment shown in fig. 3, the image capturing apparatus determines, in response to a shooting instruction, an image exposure manner and a target light emission order of the plurality of light emitting units, wherein the image exposure manner is a line-by-line exposure manner, and the target light emission order is different from an arrangement order of the plurality of light emitting units; then, the image pickup apparatus performs image exposure according to the image exposure manner, and controls the plurality of light emitting units to emit light according to the target light emission sequence to realize image capturing. By changing the light emitting sequence of the plurality of light emitting units, the periodicity of the light emitting of the backlight light source is reduced, even the periodicity of the light emitting of the backlight light source is completely eliminated, the optical interference caused by the inconsistency of the light emitting frame frequency of the backlight light source and the exposure frame frequency of the rolling shutter is avoided, Moire can not appear in the shot image, and the quality of the image is improved.
On the basis of the embodiment shown in fig. 3, when the light-emitting units are different, the target light-emitting order of the image pickup apparatus is also different. Next, the target light emission sequence corresponding to each of the different light-emitting units will be described in detail.
Fig. 4 is a second flowchart illustrating a backlight control method according to an embodiment of the present application. Referring to fig. 4, taking an example that the plurality of light emitting units includes N rows of light emitting units, the method may include:
s401, responding to a shooting instruction, and determining an image exposure mode.
It should be noted that the execution process of S401 may refer to the execution process of S301, and is not described herein again.
S402, randomly arranging the line numbers of the N lines of light-emitting units to generate a target light-emitting sequence.
The target light-emitting sequence may be used to indicate a light-emitting sequence of N rows of light-emitting units, the target light-emitting sequence including N row numbers, N being an integer greater than 1.
The target light emitting sequence may have two rows of light emitting sequences identical to the arrangement sequence, or may be completely different from the arrangement sequence of the plurality of light emitting cells.
For example, if there are 6 rows of light-emitting cells, the arrangement order is 1, 2, 3, 4, 5, 6, and the target light-emitting order may be 2, 1, 3, 4, 6, 5, or 6, 3, 5, 2, 4, 1.
When the target light-emitting sequence is completely different from the arrangement sequence of the plurality of light-emitting units, the periodicity of light emission of the light-emitting units can be completely eliminated, the optical interference caused by the inconsistency of the light-emitting frame frequency of the backlight light source and the exposure frame frequency of the roller shutter can be completely avoided, moire fringes can not appear in the finally shot image, and the quality of the image is improved.
And S403, performing image exposure according to the image exposure mode, and controlling the plurality of light-emitting units to emit light according to the target light-emitting sequence to realize image shooting.
In one light emitting period, only one row of light emitting cells emits light. The plurality of light emitting units may be controlled to emit light according to the target light emission sequence by:
and in the ith light-emitting period, acquiring the ith line number in the target light-emitting sequence, and controlling a line of light-emitting units corresponding to the ith line number to emit light, wherein i sequentially takes 1, 2, … … and N.
In the embodiment shown in fig. 4, the image capturing apparatus determines, in response to a shooting instruction, that the image exposure mode is a line-by-line exposure mode, and randomly arranges the line numbers of N lines of light emitting units to generate a target light emission order; then, the image pickup apparatus performs image exposure according to the image exposure manner, and controls the plurality of light emitting units to emit light according to the target light emission sequence to realize image capturing. By changing the light emitting sequence of the light emitting units, the periodicity of light emission of the backlight light source is reduced, optical interference caused by the fact that the frame frequency of light emission of the backlight light source is not consistent with the exposure frame frequency of the roller shutter is avoided, moire fringes do not appear in a shot image, and the quality of the image is improved.
For ease of understanding, the embodiment shown in fig. 4 will be described in detail below with reference to fig. 5.
Fig. 5 is a schematic diagram of a light emitting sequence of a plurality of light emitting units according to an embodiment of the present application. Referring to fig. 5, it is assumed that the photographed image includes 4 lines and the backlight source includes 5 lines of light emitting units. In the process of image shooting, in the 1 st lighting period, the 1 st line in the first frame image is exposed, and the 2 nd line of the backlight light source is lighted, so that the light source can be provided for the 1 st line in the first frame image. In the 2 nd lighting period, the 2 nd line in the first frame image is exposed, and the 4 th line of the backlight light source is lighted, and the light source may be provided for the 2 nd line in the first frame image. In the 3 rd lighting period, the 3 rd line in the first frame image is exposed, and the 1 st line of the backlight light source is lighted, and the light source can be provided for the 3 rd line in the first frame image. In the 4 th lighting period, the 4 th line in the first frame image is exposed, and the 5 th line of the backlight light source is lighted, and the light source may be provided for the 4 th line in the first frame image. In the 5 th lighting period, the 1 st line in the second frame image is exposed, and the 5 th line of the backlight light source is lighted, and the light source may be provided for the 1 st line in the second frame image.
By changing the light emitting sequence of the light emitting units, the periodicity of light emission of the backlight light source is reduced, optical interference caused by the fact that the frame frequency of light emission of the backlight light source is not consistent with the exposure frame frequency of the roller shutter is avoided, moire fringes do not appear in a shot image, and the quality of the image is improved.
Fig. 6 is a third flowchart illustrating a backlight control method according to an embodiment of the present application. Referring to fig. 6, taking an example that the plurality of light emitting cells includes M × K light emitting cells, the method may include:
s601, responding to the shooting instruction, and determining an image exposure mode.
It should be noted that the execution process of S601 may refer to the execution process of S301, and is not described herein again.
S602, M groups of light-emitting units are determined, each group of light-emitting units comprises K light-emitting units, and the sequence of the M groups of light-emitting units is determined as a target light-emitting sequence.
The K light-emitting units are respectively positioned in different columns, and M and K are respectively integers more than 1.
For any ith group of light-emitting units, the ith group of light-emitting units can be determined by:
and if the i is 1, randomly selecting one light-emitting unit in each column respectively to obtain a 1 st group of light-emitting units.
If i is larger than 1, respectively determining the rest light-emitting units in each row of light-emitting units, and respectively randomly selecting one light-emitting unit from the rest light-emitting units in each row of light-emitting units to obtain the ith group of light-emitting units; the remaining light emitting cells of the jth column of light emitting cells are not included in the first i-1 group of light emitting cells.
The light emitting cells selected in each column may or may not be the same.
For example, if there are three rows of light emitting units, each row has 3 light emitting units, the first light emitting unit in the first row, the second light emitting unit in the second row, and the first light emitting unit in the third row may be selected to form the 1 st group of light emitting units. Then, a third light emitting unit is selected in the first column, a first light emitting unit is selected in the second column, and a second light emitting unit is selected in the third column, thereby forming a 2 nd group of light emitting units.
When the light-emitting units selected in each column are different, the periodicity of light emission of the light-emitting units can be completely eliminated, the optical interference caused by the inconsistency of the frame frequency of light emission of the backlight light source and the exposure frame frequency of the roller shutter can be completely avoided, moire fringes can not appear in the finally shot image, and the quality of the image is improved.
S603, image exposure is carried out according to the image exposure mode, and the plurality of light-emitting units are controlled to emit light according to the target light-emitting sequence, so that image shooting is realized.
The plurality of light emitting units may be controlled to emit light according to the target light emission sequence by: controlling the ith group of light-emitting units to emit light in the ith light-emitting period; wherein, the i is 1, 2, … … and M in sequence.
In each period, only one group of light emitting units emits light.
In the embodiment shown in fig. 6, the image capturing apparatus determines, in response to a shooting instruction, that an image exposure mode is a line-by-line exposure mode, and determines M groups of light emitting units, each group including K light emitting units, determines the order of the M groups of light emitting units as a target light emitting order; then, the image pickup apparatus performs image exposure according to the image exposure manner, and controls the plurality of light emitting units to emit light according to the target light emission sequence to realize image capturing. By changing the light emitting sequence of the light emitting units, the periodicity of the backlight light source light emission is completely eliminated, the optical interference caused by the inconsistency of the frame frequency of the backlight light source light emission and the exposure frame frequency of the rolling shutter is avoided, moire fringes do not appear in the shot image, and the quality of the image is improved.
For ease of understanding, the method shown in the embodiment of fig. 6 will be described in detail below with reference to fig. 7.
Fig. 7 is a schematic diagram of a target light emitting sequence of M × K light emitting cells according to an embodiment of the present application. Referring to fig. 7, assume that the image includes 4 rows. M =6, K =7, i.e., 7 columns of light emitting cells are included in the plurality of light emitting cells, 6 light emitting cells are included in each column of light emitting cells, wherein,
when i =1, one light emitting unit is randomly selected in 7 columns, for example, the 3 rd light emitting unit is selected in the 1 st column, the 5 th light emitting unit is selected in the 2 nd column, the 2 nd light emitting unit is selected in the 3 rd column, the 6 th light emitting unit is selected in the 4 th column, the 4 th light emitting unit is selected in the 5 th column, the 1 st light emitting unit is selected in the 6 th column, and the 5 th light emitting unit is selected in the 7 th column. As can be seen from the above, the 1 st group of light emitting units includes: a 3 rd light emitting unit in a 1 st column, a 5 th light emitting unit in a 2 nd column, a 2 nd light emitting unit in a 3 rd column, a 6 th light emitting unit in a 4 th column, a 4 th light emitting unit in a 5 th column, a 1 st light emitting unit in a 6 th column, and a 5 th light emitting unit in a 7 th column.
Accordingly, in the 1 st lighting period, the 1 st line in the first frame image is exposed, and the 1 st group lighting unit lights.
When i =2, a 2 nd light emitting cell is randomly selected from the remaining light emitting cells (1, 2, 4, 5, 6) of the 1 st column, a 3 rd light emitting cell is randomly selected from the remaining light emitting cells (1, 2, 3, 4, 6) of the 2 nd column, a 6 th light emitting cell is randomly selected from the remaining light emitting cells (1, 3, 4, 5, 6) of the 3 rd column, a 1 st light emitting cell is randomly selected from the remaining light emitting cells (1, 2, 3, 4, 5) of the 4 th column, a 2 nd light emitting cell is randomly selected from the remaining light emitting cells (1, 2, 3, 4, 5, 6) of the 5 th column, a 5 th light emitting cell is randomly selected from the remaining light emitting cells (2, 3, 4, 6) of the 6 th column, and a 4 th light emitting cell is randomly selected from the remaining light emitting cells (1, 2, 3, 4, 6) of the 7 th column. As can be seen from the above, the 2 nd group light emitting unit includes: a 2 nd light emitting unit in a 1 st column, a 3 rd light emitting unit in a 2 nd column, a 6 th light emitting unit in a 3 rd column, a 1 st light emitting unit in a 4 th column, a 2 nd light emitting unit in a 5 th column, a 5 th light emitting unit in a 6 th column, and a 4 th light emitting unit in a 7 th column.
Accordingly, in the 2 nd lighting period, the 2 nd line in the first frame image is exposed, and the 2 nd group lighting unit lights.
By analogy, the 3 rd group of light emitting units comprises: a 1 st light emitting cell in a 1 st column, a 6 th light emitting cell in a 2 nd column, a 3 rd light emitting cell in a 3 rd column, a 4 th light emitting cell in a 4 th column, a 5 th light emitting cell in a 5 th column, a 3 rd light emitting cell in a 6 th column, and a 2 nd light emitting cell in a 7 th column.
Accordingly, in the 3 rd lighting period, the 3 rd line in the first frame image is exposed, and the 3 rd group lighting unit emits light.
The 4 th group of light emitting units includes: the 4 th light emitting cell in the 1 st column, the 2 nd light emitting cell in the 2 nd column, the 5 th light emitting cell in the 3 rd column, the 3 rd light emitting cell in the 4 th column, the 1 st light emitting cell in the 5 th column, the 6 th light emitting cell in the 6 th column, and the 1 st light emitting cell in the 7 th column.
Accordingly, in the 4 th lighting period, the 4 th line in the first frame image is exposed, and the 4 th group lighting unit lights.
The 5 th group of light emitting units includes: the 6 th light emitting cell in the 1 st column, the 4 th light emitting cell in the 2 nd column, the 1 st light emitting cell in the 3 rd column, the 5 th light emitting cell in the 4 th column, the 3 rd light emitting cell in the 5 th column, the 4 th light emitting cell in the 6 th column, and the 6 th light emitting cell in the 7 th column.
Accordingly, in the 5 th lighting period, the 1 st line in the second frame image is exposed, and the 5 th group lighting unit lights.
The 6 th group of light emitting units includes: the 5 th light emitting unit in the 1 st column, the 1 st light emitting unit in the 2 nd column, the 4 th light emitting unit in the 3 rd column, the 2 nd light emitting unit in the 4 th column, the 6 th light emitting unit in the 5 th column, the 2 nd light emitting unit in the 6 th column, and the 3 rd light emitting unit in the 7 th column.
Accordingly, in the 6 th lighting period, the 2 nd line in the second frame image is exposed, and the 6 th group lighting unit lights.
By changing the light emitting sequence of the light emitting units, the periodicity of the backlight light source light emission is completely eliminated, the optical interference caused by the inconsistency of the frame frequency of the backlight light source light emission and the exposure frame frequency of the rolling shutter is avoided, moire fringes do not appear in the shot image, and the quality of the image is improved.
Fig. 8 is a schematic structural diagram of a backlight control device according to an embodiment of the present application. Referring to fig. 8, the backlight control apparatus 10 is applied to an image pickup device including a plurality of light emitting units arranged in sequence, including a determination module 11 and a control module 12, wherein,
the determining module 11 is configured to determine an image exposure mode and a target light emitting sequence of the plurality of light emitting units in response to a shooting instruction; the image exposure mode is a line-by-line exposure mode, and the target light-emitting sequence is different from the arrangement sequence of the plurality of light-emitting units;
the control module 12 is configured to perform image exposure according to the image exposure mode, and control the light-emitting units to emit light according to the target light-emitting sequence, so as to implement image capturing.
In a possible implementation, the determining module 11 is specifically configured to:
determining a preset light emitting sequence as the target light emitting sequence; alternatively, the first and second electrodes may be,
and randomly generating the target light-emitting sequence.
In a possible implementation manner, the plurality of light emitting units includes N rows of light emitting units, and the determining module 11 is specifically configured to:
and randomly arranging the line numbers of the N lines of light-emitting units to generate the target light-emitting sequence, wherein the target light-emitting sequence is used for indicating the light-emitting sequence of the N lines of light-emitting units, the target light-emitting sequence comprises N line numbers, and N is an integer greater than 1.
In a possible embodiment, the control module 12 is specifically configured to:
in the ith light-emitting period, acquiring the ith line number in the target light-emitting sequence, and controlling a line of light-emitting units corresponding to the ith line number to emit light;
wherein, the i is 1, 2, … … and N in sequence.
In a possible embodiment, the plurality of light emitting units includes M × K light emitting units, and the determining module 11 is configured to:
determining M groups of light-emitting units, wherein each group of light-emitting units comprises K light-emitting units, the K light-emitting units are respectively positioned in different columns, and M and K are respectively integers greater than 1;
and determining the sequence of the M groups of light-emitting units as the target light-emitting sequence.
In a possible implementation, the determining module 11 is configured to:
if the i is 1, randomly selecting one light-emitting unit in each row respectively to obtain a 1 st group of light-emitting units;
if i is larger than 1, respectively determining the rest light-emitting units in each row of light-emitting units, and respectively randomly selecting one light-emitting unit from the rest light-emitting units in each row of light-emitting units to obtain the ith group of light-emitting units; the remaining light emitting cells of the jth column of light emitting cells are not included in the first i-1 group of light emitting cells.
In one possible embodiment, the control module 12 is configured to:
controlling the ith group of light-emitting units to emit light in the ith light-emitting period;
wherein, the i is 1, 2, … … and M in sequence.
The backlight control apparatus 10 provided in the present application can implement the technical solution shown in the above-mentioned embodiment of the backlight control method, and the implementation principle and the beneficial effect thereof are similar, which are not described again here.
Fig. 9 is a schematic structural diagram of a backlight control device according to an embodiment of the present application. Referring to fig. 9, the backlight control apparatus 20 includes: memory 21, processor 22. Illustratively, the memory 21, the processor 22, and the various parts are interconnected by a bus 23.
The backlight control device shown in the embodiment shown in fig. 9 can execute the technical solution shown in the above-mentioned backlight control method embodiment, and the implementation principle and the beneficial effect thereof are similar, and are not described herein again.
The embodiment of the application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the computer-readable storage medium is used for implementing the backlight control method described in any one of the above.
The present application provides a computer program product, including a computer program, which when executed by a processor implements the backlight control method described in any one of the above.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the application. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims (11)
1. A backlight control method applied to an image pickup apparatus including a plurality of light emitting units arranged in sequence, the method comprising:
determining an image exposure manner and a target light emitting sequence of the plurality of light emitting units in response to a photographing instruction; the image exposure mode is a line-by-line exposure mode, and the target light-emitting sequence is different from the arrangement sequence of the plurality of light-emitting units;
and carrying out image exposure according to the image exposure mode, and controlling the plurality of light-emitting units to emit light according to the target light-emitting sequence so as to realize image shooting.
2. The method of claim 1, wherein determining the target lighting order for the plurality of lighting units comprises:
determining a preset light emitting sequence as the target light emitting sequence; alternatively, the first and second electrodes may be,
and randomly generating the target light-emitting sequence.
3. The method of claim 2, wherein the plurality of light-emitting cells comprises N rows of light-emitting cells; randomly generating the target lighting order, comprising:
and randomly arranging the line numbers of the N lines of light-emitting units to generate the target light-emitting sequence, wherein the target light-emitting sequence is used for indicating the light-emitting sequence of the N lines of light-emitting units, the target light-emitting sequence comprises N line numbers, and N is an integer greater than 1.
4. The method according to claim 3, wherein controlling the plurality of light-emitting units to emit light according to the target light-emitting sequence comprises:
in the ith light-emitting period, acquiring the ith line number in the target light-emitting sequence, and controlling a line of light-emitting units corresponding to the ith line number to emit light;
wherein, the i is 1, 2, … … and N in sequence.
5. The method of claim 2, wherein the plurality of light-emitting cells comprises M x K light-emitting cells; randomly generating the target lighting order, comprising:
determining M groups of light-emitting units, wherein each group of light-emitting units comprises K light-emitting units, the K light-emitting units are respectively positioned in different columns, and M and K are respectively integers greater than 1;
and determining the sequence of the M groups of light-emitting units as the target light-emitting sequence.
6. The method of claim 5, wherein determining the ith group of light-emitting units for any ith group of light-emitting units comprises:
if the i is 1, randomly selecting one light-emitting unit in each row respectively to obtain a 1 st group of light-emitting units;
if i is larger than 1, respectively determining the rest light-emitting units in each row of light-emitting units, and respectively randomly selecting one light-emitting unit from the rest light-emitting units in each row of light-emitting units to obtain the ith group of light-emitting units; the remaining light emitting cells of the jth column of light emitting cells are not included in the first i-1 group of light emitting cells.
7. The method according to claim 5 or 6, wherein controlling the plurality of light-emitting units to emit light according to the target light-emitting sequence comprises:
controlling the ith group of light-emitting units to emit light in the ith light-emitting period;
wherein, the i is 1, 2, … … and M in sequence.
8. A backlight control device is applied to an image pickup apparatus including a plurality of light emitting units arranged in sequence, including a determination module and a control module, wherein,
the determining module is used for responding to a shooting instruction and determining an image exposure mode and a target light-emitting sequence of the plurality of light-emitting units; the image exposure mode is a line-by-line exposure mode, and the target light-emitting sequence is different from the arrangement sequence of the plurality of light-emitting units;
the control module is used for carrying out image exposure according to the image exposure mode and controlling the plurality of light-emitting units to emit light according to the target light-emitting sequence so as to realize image shooting.
9. A backlight control device, comprising a processor, a memory;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored by the memory, causing the processor to perform the backlight control method of any of claims 1 to 7.
10. A computer-readable storage medium having computer-executable instructions stored therein, which when executed by a processor, are configured to implement the backlight control method of any one of claims 1 to 7.
11. A computer program product, characterized in that it comprises a computer program which, when executed by a processor, implements the backlight control method of any one of claims 1 to 7.
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