Exposure configuration method, storage medium and electronic device

Abstract

The present disclosure provides an exposure configuration method, storage medium, and electronic device. The exposure configuration method includes: updating a first count value based on an image frame header signal; when the first count value is updated and a first exposure sequence set includes exposure parameters, selecting exposure parameters from the first exposure sequence set and configuring the exposure parameters to an image sensor; updating a second count value based on an image frame end signal; when the second count value is updated, obtaining a reference image corresponding to the second count value and generating a second exposure sequence set based on the reference image; and when the second exposure sequence set includes exposure parameters, using the second exposure sequence set to update the first exposure sequence set. The exposure configuration method can improve exposure stability and smoothness.

Claims

1. An exposure configuration method, characterized in that: include: updating the first count value according to the image frame header signal; When the first count value is updated and the first exposure sequence set includes exposure parameters, selecting exposure parameters from the first exposure sequence set and configuring the exposure parameters to the image sensor; updating the second count value according to the image frame end signal; acquiring a reference image corresponding to the second count value when the second count value is updated, and generating a second exposure sequence set according to the reference image; as well as When the second exposure sequence set includes exposure parameters, the first exposure sequence set is updated using the second exposure sequence set.

2. The exposure configuration method according to claim 1, wherein: Updating the first count value according to the image frame header signal includes: When the image sensor outputs the first pixel of an image frame or a frame start short packet, the first counter of the image signal processor receives the image frame header signal from the image sensor to update the first count value.

3. The exposure configuration method according to claim 1, wherein: Updating the second count value according to the image frame end signal includes: After the image sensor completes pixel output of an image frame, a second counter of an image signal processor receives the image frame end signal from the image sensor to update the second count value.

4. The exposure configuration method according to claim 1, wherein: Updating the second count value according to the image frame end signal includes: When the number of pixels received by the image signal processor is less than the number of pixels output by the image sensor, the second counter of the image signal processor updates the second count value according to the image frame end signal sent by the image signal processor.

5. The exposure configuration method according to claim 1, wherein: Also includes: When the first count value is updated and the first exposure sequence set does not include exposure parameters, the exposure parameters of the image sensor remain unchanged.

6. The exposure configuration method according to claim 1, wherein: Also includes: The exposure parameters in the first exposure sequence set are arranged in a monotonic order.

7. The exposure configuration method according to claim 6, wherein: Arranging the exposure parameters in the first exposure sequence set in a monotonic order includes: When the image is dark, arranging the exposure parameters in the first exposure sequence set in a monotonically increasing order; and When the image is bright, the exposure parameters in the first exposure sequence set are arranged in a monotonically decreasing order.

8. The exposure configuration method according to claim 7, wherein: Selecting exposure parameters from the first exposure sequence set and configuring the exposure parameters to the image sensor includes: The exposure parameter with the highest ranking is selected from the first exposure sequence set and configured to the image sensor.

9. The exposure configuration method according to claim 1, wherein: Generating a second exposure sequence set according to the reference image includes: generating photometric parameters according to the reference image; generating a comparison parameter and a first exposure parameter according to the light metering parameter; obtaining a first exposure coefficient according to the comparison parameter; Obtaining second exposure parameters from the first exposure sequence set; and The second exposure sequence set is generated according to the first exposure parameter, the first exposure coefficient, and the second exposure parameter.

10. The exposure configuration method according to claim 9, wherein: Acquiring the second exposure parameter from the first exposure sequence set includes: If the number of exposure parameters in the first exposure sequence set is not 0, obtaining a specific exposure parameter in the first exposure sequence set as the second exposure parameter, where the second exposure parameter represents the exposure parameter to be configured and sent; and If the number of exposure parameters in the first exposure sequence set is 0, the current exposure parameter of the image sensor is obtained as the second exposure parameter, where the second exposure parameter represents the exposure parameter that has been issued and configured.

11. The exposure configuration method according to claim 9, wherein: Generating photometric parameters according to the reference image includes: The photometric parameters for characterizing the brightness condition of the reference image are generated.

12. The exposure configuration method according to claim 9, wherein: Generating photometric parameters according to the reference image includes: Acquiring brightness parameters of the reference image, the brightness parameters including a weighted block brightness mean, a weighted histogram brightness mean, a bright area mean, and / or a dark area mean of the reference image; and Performing linear transformation on the brightness parameter of the reference image to obtain the photometric parameter.

13. The exposure configuration method according to claim 9, wherein: Generating comparison parameters according to the photometric parameters includes: The comparison parameter is generated to characterize the deviation between the image brightness of the reference image and the target brightness.

14. The exposure configuration method according to claim 13, wherein: The comparison parameter r is obtained by the following formula: r=b×f(cg-pre1)+a Wherein b represents a proportional coefficient, a represents an offset parameter, cg represents a photometric parameter, pre1 represents a first preset value, f is a correlation function of the difference between the photometric parameter and the first preset value, and the proportional coefficient is determined according to the frame rate.

15. The exposure configuration method according to claim 9, wherein: Acquiring a first exposure coefficient according to the comparison parameter includes: The first exposure coefficient is determined according to a preset interval in which the comparison parameter is located, wherein different preset intervals correspond to different first exposure coefficients.

16. The exposure configuration method according to claim 9, wherein: Acquiring a first exposure coefficient according to the comparison parameter includes: The first exposure coefficient is generated to characterize a step of exposure parameters in the second exposure sequence set, the first exposure coefficient being positively correlated with the comparison parameter.

17. The exposure configuration method according to claim 16, wherein: Generating the second exposure sequence set according to the first exposure parameter, the first exposure coefficient, and the second exposure parameter includes: The number K of exposure parameters in the second exposure sequence set is obtained by the following formula: K = floor (ABS | first exposure parameter - second exposure parameter |) / first exposure coefficient The exposure parameters in the second exposure sequence set are obtained by the following formula: where exp k represents the kth exposure parameter in the second exposure sequence set, k=0, 1, ..., K-1.

18. The exposure configuration method according to claim 9, wherein: Acquiring a first exposure coefficient according to the comparison parameter includes: The first exposure coefficient is generated to characterize the number of exposure parameters in the second exposure sequence set, and the first exposure coefficient is negatively correlated with the comparison parameter.

19. The exposure configuration method according to claim 18, wherein: Generating the second exposure sequence set according to the first exposure parameter, the first exposure coefficient, and the second exposure parameter includes: The exposure parameters in the second exposure sequence set are obtained by the following formula: or, where exp k represents the kth exposure parameter in the second exposure sequence set, k=0, 1, ..., K-1.

20. An exposure configuration method, characterized in that: include: The image sensor captures images according to the configured exposure parameters; The first counter of the image signal processor updates the first count value when receiving the image frame header signal; When the first count value is updated and a first exposure sequence set includes exposure parameters, the image signal processor selects an exposure parameter from the first exposure sequence set and configures the exposure parameter to the image sensor; The second counter of the image signal processor updates a second count value when receiving an image frame end signal; acquiring, by the image signal processor, a reference image corresponding to the second count value when the second count value is updated, and generating a second exposure sequence set according to the reference image; as well as When the second exposure sequence set includes exposure parameters, the image signal processor updates the first exposure sequence set using the second exposure sequence set.

21. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the exposure configuration method according to any one of claims 1 to 19 or the exposure configuration method according to claim 20 is implemented.

22. An electronic device, characterized in that: include: a memory configured to store an executable program; as well as The processor is configured to call the program so that the electronic device executes the exposure configuration method according to any one of claims 1 to 19, or the exposure configuration method according to claim 20.

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