Methods and systems are provided for processing digital images. An integrated grid, comprising one or more integrated values, may be generated based on processing of an image, with the generating comprising cumulatively integrating at least one value, of a cell in a bilateral grid generated based on the processed image, over the bilateral grid. A modified bilateral grid may then be generated, with generating comprising computing a sum of said at least one value over a portion of said bilateral grid, by using integrated values of said integrated grid corresponding to said portion of said bilateral grid. An output image may be generated based on the modified bilateral grid.