how to do masking with the help of binary image?

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Manoj Kumar
Manoj Kumar 2014-11-3
回答： Image Analyst 2014-11-3
Hi,
I have a binary image and using that binary image I wish to do masking.
Here is the binary image:
Using this binary image I want to mask to the original Image.
Here is the original Image:
I want the output as :
So, the output image should have the binary image portion and the remaining should be black("0").
Can you suggest me the code to do this.
Thanks...

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采纳的回答

Guillaume
Guillaume 2014-11-3
编辑：Guillaume 2014-11-3
repmat your binary image across the three colour channels and use the invert of that as logical index into your colour image to set the pixels to 0:
colourmask = repmat(binarymask, [1 1 3]);
maskedimage = colourimage;
maskedimage(~colourmask) = 0;

更多回答（1 个）

Image Analyst
Image Analyst 2014-11-3
Here's a way that Sean recommends:
% Mask the image using bsxfun() function
maskedRgbImage = bsxfun(@times, rgbImage, cast(mask, class(rgbImage)));
It works for grayscale images too. I also attach some full demos, if you're interested.

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