Openv inRange函数

void inRange(InputArray [b]src,InputArray lowerb, InputArrayupperb, OutputArray
dst)[/b]

Parameters:

src – First source array. lowerb – Inclusive lower boundary array or a scalar. upperb – Inclusive upper boundary array or a scalar. dst – Destination array of the same size as src and CV_8U type.

The function checks the range as follows:
·        For every elementof a single-channel input array:

·        For two-channelarrays:
 
·        and so forth.
That is, dst (I) is set to 255 (all 1 -bits) if src (I) is within thespecified 1D, 2D, 3D, ... box and 0 otherwise.
When the lower and/or upper bounary parameters are scalars, the indexes(I) at lowerb and upperb in the above formulas should be omitted.
 

个人理解：

例如

inRange(rgb,Scalar(0,10,30),Scalar(180,256,256),mask);

函数将分别比较rgb的B.G.R三个通道的每个元素是否位于[0,180][10,256][30,256]区间，如果是，mask的相应位设为255，否则为0。