multiply image with scalar

edit

Hello All.

Its possible this operation?;

    cv::Mat A 
    cv::Mat B 
    cv::Mat C
    A= imread(argv[1], CV_LOAD_IMAGE_COLOR);   // Read the file
    B = imread(argv[2], CV_LOAD_IMAGE_COLOR);   // Read the file
C = 5*A - 6*B

So, C will get the difference between A times 5 and B times 6. This is right? Does the matrix multiplication by scalar works fine in opencv?

I mean, for example

5*A

will it multiplicate every A pixel by 5?

I need this information because Im performing discrete filters