1. A method of tone mapping high dynamic range images for display on low dynamic range displays comprising: accessing a high dynamic range image; segmenting the high dynamic range image into different regions such that each region is represented by a matrix, where each element of the matrix is a weight of a pixel; determining exposure of each region according to a zone system that assigns one of a fixed set of discrete exposure values to each region; applying exposure values to the regions responsive to the weight; fusing the different regions together to obtain a final tone mapped image; and providing a user interface for the user to adjust a zone for individual regions.