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

Claim 17:
18. The method of claim 17, 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 includes:
by traversing the first image and the second image,
determining a first count, the first count being a count of second block weights that are larger than a first threshold and less than a second threshold;
determining a second count, the second count being a count of second block weights that are larger than or equal to the second threshold and less than or equal to a third threshold;
determining a first statistic, the first statistic being a sum of second block weights that are larger than the first threshold and less than the second threshold;
determining a second statistic, the second statistic being a sum of third block weights corresponding to the second block weights that are larger than the first threshold and less than the second threshold;
determining a third statistic, the third statistic being a sum of second block weights that are larger than or equal to the second threshold and less than or equal to the third threshold; and
determining a fourth statistic, the fourth statistic being a sum of third block weights corresponding to the second block weights that are larger than or equal to the second threshold and less than or equal to the third threshold; and

determining the exposure gain ratio by performing a linear fitting operation based on the first count, the second count, the first statistic, the second statistic, the third statistic, and the fourth statistic.