Hi Question is about eleminating unwanted regions in binary image.

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Pradeep Gowda 2016-1-10

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https://ww2.mathworks.cn/matlabcentral/answers/263250-hi-question-is-about-eleminating-unwanted-regions-in-binary-image

评论： Image Analyst 2016-1-13

I work on fundus image , bwareaopen() function removes all connected components fewer than P pixels. But in my image I need to remove all the regions which have more than 11 pixels how can I do so? And how can I calculate the metrics of each region and eliminate the structures having metrics less than 0.95?

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Image Analyst 2016-1-10

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https://ww2.mathworks.cn/matlabcentral/answers/263250-hi-question-is-about-eleminating-unwanted-regions-in-binary-image#answer_205668

在 MATLAB Online 中打开

spatial_calibration_demo.m

So P=11, right? Did you try this:

binaryImage = bwareaopen(binaryImage, 11);

Regarding "metrics", I think you need to do a spatial calibration, and I attach my demo for that. So then use regionprops() and multiply linear measurements by the spatial calibration factor and area measurements by the spatial calibration factor squared.