Patent ID: 8743226

Claim:
An exposure adjustment method for night-vision camera, used to adjust an exposure parameter of a dynamic image having an image object, the exposure adjustment method comprising: adjusting an intensity value of an infrared light source, and shooting a first image before adjusting the intensity value and shooting a second image after adjusting the intensity value, wherein the infrared light source is configured to cast infrared light onto the image object; dividing the shot first image into a plurality of first image blocks; dividing the shot second image into a plurality of second image blocks; obtaining a first light reflectivity according to the casted infrared light and the first image block; obtaining a second light reflectivity according to the casted infrared light and the second image block; comparing the first light reflectivity and the second light reflectivity, so as to determine an object distance of the image object; adjusting a light measuring weight of each of the first image blocks and the second image blocks according to the object distance; and re-calculating the exposure parameter of the dynamic image according to the light measuring weight, and shooting the dynamic image.