### Reshaping nxnx3 Mat Object to 3xn.n

Hi,

I have to multiply each and every pixel held in a mat object by a 3x3 Matrix (each pixel as in R, G, B ~~(3x1 matrix) ~~values are to be ~~processed) and ~~processed. RGB values will make a 3x1 matrix, hence the matrix multiplication)

I don't want to use for-loops because that makes the ~~cod ~~code inefficient. ~~One ~~So, one way I found out is to change nxnx3 Mat object to 3xn.n, can anybody tell me how to do that?

Thanks!