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masking in RGB image

2 次查看（过去 30 天）
Aman
Aman 2012-10-10
i have a RGB image. I want to know the method to mask a particular area of that image. The area need to be selected by mouse cursor.

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回答（2 个）

Doug Hull
Doug Hull 2012-10-10
Image Analyst
Image Analyst 2012-10-10
编辑：Image Analyst 2012-10-10
Here's a demo:
% Have user freehand draw a mask in the image.
uiwait(msgbox('Draw a region with left button down. Double click inside to finish it'));
h = imfreehand();
vertices = wait(h);
% Create a binary mask
mask = createMask(h);
subplot(2,2,1);
imshow(mask, []);
% Mask the image.
maskedRgbImage = bsxfun(@times, rgbImage, cast(mask,class(rgbImage)));
subplot(2,2,2);
imshow(maskedRgbImage);

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