the present invention discloses a region based shutter adaptation method for image exposure . the method includes the steps of : providing an image which is non - uniformly illuminated ; segmenting the image into two or more non - overlapping regions ; identifying brightness values for each of the regions when more than one brightness value has been produced for each of the regions ; applying the whole image with different shutters for different regions ; and exposing different regions for different exposure durations according to the brightness values respectively assigned to the regions , so that the present invention is capable of enabling different regions within the whole image which is non - uniformly illuminated to have different shutter adaptions .