A regulation method for automatic exposure control, AEC, of a region of interest, comprising: obtaining a luminance histogram of each color channel in a region of interest based on statistics on a luminance of a plurality of sub-region blocks in the region of interest, the luminance histogram of the each color channel comprising a corresponding relationship between the luminance and a number of sub-region blocks corresponding to the luminance of the color channel; determining a first luminance of the each color channel according to the luminance histogram of the each color channel in the region of interest and the corresponding relationship between the luminance and the number of the sub-region blocks, the first luminance being associated with a present AEC luminance; determining a reference luminance based on the first luminance of the each color channel, and obtaining a reference color channel corresponding to the reference luminance; obtaining a target luminance corresponding to the present AEC luminance; and performing a luminance regulation on the reference color channel according to the target luminance; wherein obtaining the target luminance corresponding to the present AEC luminance comprises: obtaining a second luminance corresponding to the present AEC luminance based on first preset AEC information including a corresponding relationship between the target luminance and the reference luminance, the second luminance serving as the target luminance; or determining a sum of the numbers of sub-region blocks corresponding to respective luminance between the reference luminance and a luminance peak; determining a second ratio of the sum to a total number of the plurality of sub-region blocks in the region of interest; and obtaining fourth luminance corresponding to the second ratio based on third preset AEC information, the fourth luminance serving as the target luminance; wherein determining the first luminance of the each color channel comprises: determining a lowest luminance of the each color channel according to the luminance histogram of the each color channel in the region of interest and the corresponding relationship between the luminance and the number of the sub-region blocks, wherein the lowest luminance of the each color channel meets a requirement of the present AEC luminance. obtaining a luminance histogram of each color channel in a region of interest based on statistics on a luminance of a plurality of sub-region blocks in the region of interest, the luminance histogram of the each color channel comprising a corresponding relationship between the luminance and a number of sub-region blocks corresponding to the luminance of the color channel; determining a first luminance of the each color channel according to the luminance histogram of the each color channel in the region of interest and the corresponding relationship between the luminance and the number of the sub-region blocks, the first luminance being associated with a present AEC luminance; determining a reference luminance based on the first luminance of the each color channel, and obtaining a reference color channel corresponding to the reference luminance; obtaining a target luminance corresponding to the present AEC luminance; and performing a luminance regulation on the reference color channel according to the target luminance; wherein obtaining the target luminance corresponding to the present AEC luminance comprises: obtaining a second luminance corresponding to the present AEC luminance based on first preset AEC information including a corresponding relationship between the target luminance and the reference luminance, the second luminance serving as the target luminance; or determining a sum of the numbers of sub-region blocks corresponding to respective luminance between the reference luminance and a luminance peak; determining a second ratio of the sum to a total number of the plurality of sub-region blocks in the region of interest; and obtaining fourth luminance corresponding to the second ratio based on third preset AEC information, the fourth luminance serving as the target luminance; wherein determining the first luminance of the each color channel comprises: determining a lowest luminance of the each color channel according to the luminance histogram of the each color channel in the region of interest and the corresponding relationship between the luminance and the number of the sub-region blocks, wherein the lowest luminance of the each color channel meets a requirement of the present AEC luminance. obtaining a second luminance corresponding to the present AEC luminance based on first preset AEC information including a corresponding relationship between the target luminance and the reference luminance, the second luminance serving as the target luminance; or determining a sum of the numbers of sub-region blocks corresponding to respective luminance between the reference luminance and a luminance peak; determining a second ratio of the sum to a total number of the plurality of sub-region blocks in the region of interest; and obtaining fourth luminance corresponding to the second ratio based on third preset AEC information, the fourth luminance serving as the target luminance; wherein determining the first luminance of the each color channel comprises: determining a lowest luminance of the each color channel according to the luminance histogram of the each color channel in the region of interest and the corresponding relationship between the luminance and the number of the sub-region blocks, wherein the lowest luminance of the each color channel meets a requirement of the present AEC luminance.