Patent ID: 9129445
Filing Date: 2015-09-08
Classification: G06T,H04N

Abstract:
1. A system for mapping input image data having a first dynamic range, to output image data having a second dynamic range, said second dynamic range being a lower dynamic range than said first dynamic image range, said system comprising: a tone mapping module, said tone mapping module inputting a luminance signal (Y′) from said input image data and outputting a tone-mapped luminance signal (y′) for said output image data; and a color mapping module, said color mapping module inputting chroma signals from said input image data and inputting said tone-mapped luminance signal from said tone mapping module, said tone-mapped luminance signal being associated with said chroma signals, and said color mapping module outputting chroma signals for said output image data; and wherein said input image data and said output image data are YCbCr image data; said input image data has a high dynamic range (HDR) image format for an HDR image capture device; said output image data has a low dynamic range (LDR) image format for an LDR display device; said color mapping module is capable of mapping said chroma signals (C said function comprises wherein cb=cr=128 when Y′=0, T is an offset for said HDR image format, t is an offset for said LDR image format, and M