Transforming wide dynamic range images to reduced dynamic range images

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专利权人:

TEXAS INSTRUMENTS INCORPORATED

发明人:

Zhang Buyue,Batur Aziz Umit

申请号：

US201514866112

公开号：

US9881357(B2)

申请日:

2015.09.25

申请国别(地区):

美国

年份:

2018

代理人:

Albin Gregory J.`Brill Charles A.`Cimino Frank D.

摘要：

A method of transforming an N-bit raw wide dynamic range (WDR) Bayer image to a K-bit raw red-green-blue (RGB) image wherein N>K is provided that includes converting the N-bit raw WDR Bayer image to an N-bit raw RGB image, computing a luminance image from the N-bit raw RGB image, computing a pixel gain value for each luminance pixel in the luminance image to generate a gain map, applying a hierarchical noise filter to the gain map to generate a filtered gain map, applying the filtered gain map to the N-bit raw RGB image to generated a gain mapped N-bit RGB image, and downshifting the gain mapped N-bit RGB image by (N−K) to generate the K-bit RGB image.

来源网站：

中国工程科技知识中心

来源网址：

http://www.ckcest.cn/home/