Divide any blob into half

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Hg
Hg 2015-6-3
评论： Image Analyst 2015-6-9
I would like to find the equation of a line that passes through the centroid of a blob so that I can divide the blob into half. How can I achieve this after I get the centroid from regionprops() ?
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Image Analyst
Image Analyst 2015-6-5
Like I asked before (and you didn't answer)...Why do you want to do this? Give us some context. Like Guillaume said, you could pick any angle.
Hg
Hg 2015-6-7
I'm cropping an image and one of the criteria is to reduce the size of a "long" blob by removing half of it.

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Image Analyst
Image Analyst 2015-6-8
Hg says the real need is for "cropping an image and one of the criteria is to reduce the size of a "long" blob by removing half of it." You can do that with imerode. But I asked for the context and you still haven't provided that. Why would you want to reduce the size of your segmented blobs by half? What is the point in doing that?
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Salaheddin Hosseinzadeh
Salaheddin Hosseinzadeh 2015-6-9
Guys, what's PixelList? Is it the perimeter of the blob?
Image Analyst
Image Analyst 2015-6-9
PixelList is a list of the (x,y) coordinates of all the pixels in each blob. Perimeter is a separate measurement that you can ask for.

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