Methods and apparatus according to various aspects take as input image data in a lower-dynamic-range (LDR) format and produce as output enhanced image data having a dynamic range greater than that of the input image data (i.e. higher-dynamic range (HDR) image data). In some embodiments, the methods are...http://www.google.com.au/patents/US8135230?utm_source=gb-gplus-sharePatent US8135230 - Enhancing dynamic ranges of images
