HSV值在opencv中的映射关系

cv在把RGB空间转换为HSV和CIE（Lab）空间之前先把RGB的值转换到0～1。 

然后，对于HSV： 
On output 0≤V≤1, 0≤S≤1, 0≤H≤360. 
The values are then converted to the destination data type: 
8-bit images: 
V <- V*255, S <- S*255, H <- H/2 (to fit to 0..255) 
16-bit images (currently not supported): 
V <- V*65535, S <- S*65535, H <- H 
32-bit images: 
H, S, V are left as is 

对于CIE（Lab）： 
On output 0≤L≤100, -127≤a≤127, -127≤b≤127 
The values are then converted to the destination data type: 
8-bit images: 
L <- L*255/100, a <- a + 128, b <- b + 128 
16-bit images are currently not supported 
32-bit images: 
L, a, b are left as is

 

 

由于是之前做转换的时候摘抄的一个文档,所以原地址已经不见了,后来在做项目的时候都用opencv自带的进行转换,不过具体的取值范围对于后续的计算还是有一定的帮助的