Better code to crop out a connected component?

Question

Qingyang 2012-7-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/43875-better-code-to-crop-out-a-connected-component

Hi, I have written this code to crop out just a connected component on an image:

rp = regionprops(cc, 'BoundingBox');
minr = rp(stainid).BoundingBox(2);
minc = rp(stainid).BoundingBox(1);
maxr = rp(stainid).BoundingBox(2) + rp(stainid).BoundingBox(4);
maxc = rp(stainid).BoundingBox(1) + rp(stainid).BoundingBox(3);
imstainzoom = im(minr:maxr, minc:maxc);

It works, but isn't the best code possible. Also, the bounding box returns non-integers (why is that?). Is there a much more efficient way to do this?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2012-7-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/43875-better-code-to-crop-out-a-connected-component#answer_53861

编辑：Image Analyst 2012-7-17

See my image segmentation tutorial where I crop out objects using their bounding boxes. http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

I believe it gives coordinates on the half pixel to eliminate any ambiguity about whether the bounding box is the inclusive box, or one pixel layer outside that. So you can use ceil() and floor() to make it do it either way depending on what you prefer.