在OpenCV中, 把彩色图像转换成灰度图像之后, 灰度图像的象素值怎么是[-128,127] ,这是怎么回事?
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卢昭金 ( Lu Zhaojin )
Ph.D candidate
Intelligent Systems Research Center,
2nd Research Complex 6th floor,
Sungkyunkwan University,
300 Cheoncheon-dong, Jangan-gu,
Suwon, Gyeonggi-do,
440-746, Korea
Tel:
+82-31-299-6477 Mobile:
+82-10-2970-1937Fax:
+82-31-299-6478 luzh...@gmail.com