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It seems that given a multichannel image, e.g. BGR, img I cannot do this:

img *= cv::Scalar(1.5,0.5,2.1)

I'd like to scale each channel by a different float factor. Is there a simple way to do this? I could use cv::transform() but that seems like overkill.

Any suggestions?

It seems that given a multichannel image, e.g. BGR, img I cannot do this:

img *= cv::Scalar(1.5,0.5,2.1)

I'd like to scale each channel by a different float factor. Is there a simple way to do this? I could use cv::transform() but that seems like overkill.overkill (I also obviously don't want to iterate on all the pixels).

Any suggestions?