Optimal Piece Linear Segments of Gamma Correction for CMOS Image Sensors

Eun-Su KIM
Soo-Wook JANG
Sung-Hak LEE
Tae-Young JUNG
Kyu-Ik SOHNG

Publication
IEICE TRANSACTIONS on Electronics   Vol.E88-C    No.11    pp.2090-2093
Publication Date: 2005/11/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.11.2090
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Electronic Displays)
Category: 
Keyword: 
CMOS image sensor,  gamma correction,  piece linear segment,  piece linear approximation,  

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Summary: 
The gamma correction for the CMOS image sensors are implemented by the method of piecewise linear approximation through a look-up table. In this paper, we propose a quantitative criterion to select the piece linear segment with the same output interval for the reduction of the error between the value of piece linear approximation and gamma correction. After the gamma correction is implemented, the average error occurred by implementing color interpolation in each segment is a basis for the optimum selecting of the piece linear segment of the gamma correction for the CMOS image sensors.