1. A moving-window, histogram equalization method of processing images, the method comprising: breaking the image into a plurality of tiles; and processing each of the plurality of tiles by obtaining a control parameter; determining a histogram for one of the plurality of tiles; determining a concentration ratio for the one of the plurality of tiles; determining an area of the image that includes the one of the plurality of tiles and information outside the one of the plurality of tiles; creating a first output by performing a histogram equalization on the area; creating a second output based on the control parameter and the first output; and using the second output to process the one of the plurality of tiles.