Patent ID: 7706676

Claim:
An automatic exposure control method, suitable for controlling a shooting exposure parameter for shooting an image by a shooting end, comprising: providing information about an object region and a background region of the image; acquiring a brightness value of the object region, a brightness value of the background region, and an overall brightness value obtained by combining the brightness value of the object region with that of the background region; determining whether the object region has a backlight phenomenon or not according to the brightness value of the object region and that of the background region; measuring a practical distance from the object region to the shooting end; sequentially acquiring at least one middle brightness value by taking the brightness value of the background region as an initial value to extend towards the overall brightness value; acquiring a corresponding exposure parameter from the acquired middle brightness values; calculating a working distance of a flash light according to the exposure parameter; determining whether the working distance of the flash light is larger than the practical distance or not; and by taking the middle brightness value satisfying the determining step as an adjusting brightness value, acquiring a corresponding exposure parameter according to the adjusting brightness value to serve as the shooting exposure parameter, and activating the flash light.