1. An image processing method, comprising: dividing a frame into a plurality of image regions, each of the image regions comprising a plurality of respective pixels; analyzing respective contents of the image regions to obtain a plurality of values as respective first regional characteristic values of the image regions, wherein each of the first regional characteristic values of each image region is based on the respective pixels in the image region; and analyzing contents of the frame according to the first regional characteristic values to respectively control a backlight and a panel based on at least one result obtained in the step of analyzing contents of the frame, wherein the step of analyzing contents of the frame comprises: performing calculation on the first regional characteristic values of the image regions to obtain a single value as a global characteristic value, the global characteristic value being related to the whole frame; and wherein the step of controlling the backlight and the panel according to the at least one result comprises: controlling at least one of the backlight and the panel according to the first regional characteristic values and/or the global characteristic value.