How do I fill the missing edges of an image in order to use the imfill command?

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Alexander Killam
Alexander Killam 2014-2-21
编辑： Image Analyst 2014-2-21
I would like to be able to threshold the heart all by itself. The overall project is to be able to get the coordinates of the heart and superimpose them into a fake body. So far I have used sobel edging and tresholding to get the heart. How do I close off all the edges so I can use the Imfill command? Thank you

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Image Analyst
Image Analyst 2014-2-21
You can try imclose() or imdilate(), which is scanning with a local max filter.
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Alexander Killam
Alexander Killam 2014-2-21
IM2 = imclose(IM,SE) performs morphological closing on the grayscale or binary image IM with the structuring element SE. SE must be a single structuring element object, as opposed to an array of objects.
Not to sound stupid but I am a really basic beginner. What would I place for the SE in that command?
Image Analyst
Image Analyst 2014-2-21
编辑：Image Analyst 2014-2-21
You could look at strel() function to create masks of different shapes. If you just want a box, you can use true():
% Close with window size of 15x15.
closedImage = imclose(grayImage, true(15));

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