Applying filter with a Mask

opencv

asked 2017-07-20 21:39:37 -0600

arqam
36 ●1 ●2 ●6

I have an image and a mask, where I want to do filter/blur operations only at the region where the mask is white i.e the mask has value 255 and not where mask has 0.

I tried using these operation :

erode(maskImage,maskImage,Mat()); // values near irrelevant pixels should not be changed
blur(sourceImage,bluredImage,Size(3,3));
bluredImage = sourceImage + ((bluredImage-sourceImage) & maskImage);

But the & operation cannot be performed in images with different channels.

And when I tried with the accepted answer from here http://answers.opencv.org/question/30... it gave me completely black image.

So how can I do operations with a mask as a parameter?

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answered 2019-10-10 09:52:14 -0600

Jorge Diaz
51 ●3 ●5

You are trying to apply this with multiple channels which is as easy as splitting the image into the different channel until you have matrixes of the same size ( for instance in RGB, you divide in 3 channels) and then you perform the operation for each channel.