Title :
Image contrast enhancement based on the piecewise-linear approximation of CDF
Author :
Kim, Sang-Yeon ; Han, Dongil ; Choi, Seung-Jong ; Park, Jong-Seok
Author_Institution :
DTV Res. Labs., LG Electron. Inc., Seoul, South Korea
fDate :
8/1/1999 12:00:00 AM
Abstract :
We present a new image contrast enhancing method based on the piecewise-linear approximation of the cumulative density function (CDF). Reduced hardware is required for CDF calculation, since the number of bins is greatly reduced thanks to this approximation. With the proposed method, various contrast enhancing effects can be implemented such as histogram equalization, partial or entire histogram modification
Keywords :
function approximation; image enhancement; image sequences; piecewise linear techniques; video signal processing; CDF; contrast control tool; cumulative density function; digital image display devices; histogram equalization; histogram modification; image contrast enhancement; image sequence; moving picture transmission/receiving systems; piecewise-linear approximation; video conference; Brightness; Consumer electronics; Controllability; Digital TV; Hardware; Histograms; Piecewise linear approximation; Piecewise linear techniques; Pixel; Videoconference;
Journal_Title :
Consumer Electronics, IEEE Transactions on
