Two-dimensional color transformations for wide gamut workflows in digital cameras

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专利权人:

Dolby Laboratories Licensing Corporation

发明人:

McElvain Jon S.

申请号：

US201415030534

公开号：

US9479680(B2)

申请日:

2014.10.27

申请国别(地区):

美国

年份:

2016

代理人:

摘要：

In a digital camera system, traditional input color transformations of raw data using a 3×3 matrix are replaced by two-dimensional lookup (2-D LUTs) tables that better approximate spectral reflectance characteristics. Chromaticity-like signals and an input scale factor are generated in response to raw sensor output values. The chromaticity signals and the input scale factor are mapped via 2-D LUTs into preliminary output signals and an output scaling factor. A final set of output color signals is generated in response to the preliminary output signals and the output scale factor. The 2-D LUTs are designed in response to spectral response curves generated on both the input and output side of the color transformation.

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