Measuring the size of regions in an image
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Say that there are some regions I'm interested in in some image. How can I measure the size of such regions in MATLAB?
Thanks.
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Walter Roberson
am 18 Dez. 2013
Use the Image Processing Toolbox with the regionprops() function.
Note: the result will be in square pixels. To convert the square pixels to a physical area, you will need information about the relationship between pixels and physical distance for that image.
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Image Analyst
am 19 Dez. 2013
If you have also measured the centroids you can put a number over each blob. See my blobsdemo in my File Exchange for a demo of that.
Image Analyst
am 18 Dez. 2013
See my Image Segmentation Tutorial: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862.
Also see attached spatial calibration demo, below in blue text.
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Image Analyst
am 19 Dez. 2013
You did not draw the area or length correctly. If you want, run psr.exe (from Windows) and record your screen movements so I can see what you did wrong.
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