Image quality enhancement by real-time gamma correction for a CMOS image sensor in mobile phones

Author

Jeong, Hyowon ; Kim, Joohyun ; Choi, Wontae ; Kang, Bongsoon

Author_Institution

Dept. of Electron. Eng., Dong-A Univ., Busan

Volume

02

fYear

2008

fDate

24-25 Nov. 2008

Abstract

Real-time gamma correction is an essential function in display devices such as CRTs, plasma TVs, and TFT LCDs. In this paper, we present the image quality enhancement by real-time gamma correction for a CMOS image sensor in mobile phones. The proposed algorithm and system operate with a block structure and the bit width of input and output of the proposed system is 12-bit. The proposed gamma system is reduced the error range and enhanced the image quality compared with conventional system that has 10-bit input and 8-bit output. The proposed system was implemented experimentally by using Xilinx Virtex4 FPGA and was successfully demonstrated with a CMOS image sensor for mobile application.

Keywords

CMOS image sensors; field programmable gate arrays; image enhancement; mobile handsets; CMOS image sensor; Xilinx Virtex4 FPGA; image quality enhancement; mobile phones; real-time gamma correction; Brightness; CMOS image sensors; Cathode ray tubes; Computer displays; Image quality; Interpolation; Mobile handsets; Piecewise linear techniques; Plasma displays; Voltage; booth multiplier; gamma correction; piecewise linear interpolation;

fLanguage

English

Publisher

ieee

Conference_Titel

SoC Design Conference, 2008. ISOCC '08. International

Conference_Location

Busan

Print_ISBN

978-1-4244-2598-3

Electronic_ISBN

978-1-4244-2599-0

Type

conf

DOI

10.1109/SOCDC.2008.4815699

Filename

4815699