MATLAB: How to find out boundary pixels length in binary image (how many pixels are making boundary)

boundary pixels length in binary image

i had boundary extracted image now problem is : How to find out boundary pixels length in binary image (how many pixels are making boundary)

Best Answer

regionprops() with Perimeter option

Related Solutions

MATLAB: How to detect the boundary (binary image)

One way is to call imclose(), then cast the image to double and then blur it with conv2() and threshold it. Then remove any holes that remain.

mask = imclose(mask, true(7));
mask = conv2(double(mask), ones(3), 'same') > 3; % Adjust number to control the size of the new mask.
mask = imfill(mask, 'holes'); % Remove any interior holes.

Another way might be to use activecontour(). See attached demo. Attach your image if you can't figure it out.

MATLAB: Image cropping help (Crop image at boundary)

In the file exchange there are these 2 solutions: 1.- http://uk.mathworks.com/matlabcentral/fileexchange/17460-cropping-an-image-with-draggable-rectangle?s_tid=srchtitle

2.- http://uk.mathworks.com/matlabcentral/fileexchange/21178-cropping-an-image-with-resizable-and-draggable-rectangle?s_tid=srchtitle

3.- and from Image Analyst, an accepted answer:

http://uk.mathworks.com/matlabcentral/answers/215142-how-to-crop-image?s_tid=srchtitle

croppedImage = imcrop(yourImage, [1 1 200 300]);

where [xmin ymin width height] is [xmin ymin width height]

If you find this answer of any help solving your question,

please click on the thumbs-up vote link, or mark is accepted answer

thanks in advance

John

jgb2012@sky.com

Best Answer

Related Solutions

MATLAB: How to detect the boundary (binary image)

MATLAB: Image cropping help (Crop image at boundary)

Related Question