for?i=0:255;
????f=power（（i+0.5）/2561/2.2）;
????LUT（i+1）=uint8（f*256-0.5）;
end??
img=imread（‘g2.bmp‘）;
img0=rgb2ycbcr（img）;
R=img（::1）;
G=img（::2）;
B=img（::3）;
Y=img0（::1）;
Yu=img0（::1）;
[x?y]=size（Y）;
for?row=1:x
????for?width=1:y
????????for?i=0:255
????????if?（Y（rowwidth）==i）
?????????????Y（rowwidth）=LUT（i+1）;
?????????????break;?
????????end
????????end
????end
end
img0（::1）=Y;
img1=ycbcr2rgb（img0）;
R1=img1（::1）;
G1=img1（::2）;
B1=img1（::3）;
figure（1）imshow（img）title（‘原圖‘）;
figure（2）imshow（img1）title（‘校正后‘）;

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件????????576??2009-05-08?14:57??gamma\gamma0.m

?????文件?????577862??2009-04-25?13:52??gamma\g2.bmp

?????目錄??????????0??2009-05-08?16:45??gamma

-----------?---------??----------?-----??----

???????????????578438????????????????????3