MATLAB: Can I crop detected region for further analysis? For example, I would be detecting smoke, can it be automatically cropped

image analysisimage processingImage Processing Toolboxsmoke

Also can images obtained from background subtraction be returned to their original color?

Best Answer

Yes. To crop, call imcrop().

To restore an image after subtracting the background image from it, simply add the background back in.

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MATLAB: How to separate touching cells in a binary image and count them

Try the method the head of the imaging team at the Mathworks posted:

Watershed-transform-question-from-tech-support

MATLAB: Image Segmentation of binary image

This looks like homework, not a real world problem. So I'll give you hints. Use the color thresholder app on the Apps tab to create a mask for yellow. Then use regionprops() to find out which blobs have a major axis some factor longer than the minor axis:

labeledImage = bwlabel(binaryImage);
props = regionprops(labeledImage, 'MajorAxisLength', 'MinorAxisLength');
aspectRatios = [props.MajorAxisLength] ./ [props.MinorAxisLength]
bananas = aspectRatios > 2; % Or whatever.
% Extract binary image of just the banana blobs
bananasImage = ismember(bananas, find(bananas));

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Related Solutions

MATLAB: How to separate touching cells in a binary image and count them

MATLAB: Image Segmentation of binary image

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