Patent ID: 11887284
Assignee: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 6:
7. The system of claim 5, wherein the determining the exposure gain ratio based on the second block weights of the plurality of first image blocks and the third block weights of the plurality of second image blocks further includes:
determining a reference gain ratio based on the first statistic, the second statistic, the third statistic, and the fourth statistic;
determining a count of times that the exposure gain ratio is successively larger or successively smaller by comparing the exposure gain ratio to the reference gain ratio and a plurality of previous reference gain ratios, respectively, the reference gain ratio relating to a current frame, the plurality of previous reference gain ratios relating to a plurality of successive frames before the current frame;
determining whether the count of times is larger than a frame threshold;
in response to a determination that the count of times that the exposure gain ratio is successively larger is greater than the frame threshold, decreasing the exposure gain ratio; and
in response to a determination that the count of times that the exposure gain ratio is successively smaller is greater than the frame threshold, increasing the exposure gain ratio.