Image processing device and auto exposure control method

An auto exposure control method, performed by an image processing device, the auto exposure control method comprising:

• sequentially outputting a plurality of predetermined exposure control parameters to an image sensor during a first period after the image processing device is powered on, such that the image sensor generates a plurality of sets of first frame data according to the plurality of predetermined exposure control parameters, wherein the plurality predetermined exposure control parameters are different from one another;
• sequentially generating a plurality of sets of statistical data based on the plurality of sets of first frame data;
• and
• determining a first exposure control parameter according to the plurality of sets of statistical data and outputting the first exposure control parameter to the image sensor, such that the image sensor generates second frame data according to the first exposure control parameter during a second period,
• wherein a frame rate of each of the plurality of sets of first frame data is higher than that of the second frame data, and a resolution of each of the plurality of sets of first frame data is lower than that of the second frame data.