Pixel extraction and Reclassify

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dian_pratama 2015-3-12

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https://ww2.mathworks.cn/matlabcentral/answers/182749-pixel-extraction-and-reclassify

评论： Image Analyst 2015-3-17

I had segmented image and want to detect of these pixels by extracting all pixels that do not have the same label in their 3×3 neighborhood (N_ns), and then re-classify of these extracted pixels using local information in a 5×5 neighborhood (N_rl). What can I do? Thanks..

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Image Analyst 2015-3-12

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https://ww2.mathworks.cn/matlabcentral/answers/182749-pixel-extraction-and-reclassify#answer_171068

在 MATLAB Online 中打开

labelsYouWantToKeep = [3,5,9]; % Whatever blob numbers you want.
% Get a new labeled image with only those blobs in it.
newLabeledImage = ismember(originalLabeledImage, labelsYouWantToKeep);
imshow(newLabeledImage, []);  % Display it.
% Remeasure with only those blobs in the image.
newMeasurements = regionprops(newLabeledImage);

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dian_pratama 2015-3-17

How about N_ns and N_rl? Can I apply that in matlab? I think before, #3 is 3x3 neighborhood, #5 is 5x5 neighborhood, and #9 is image size. LOL..

Image Analyst 2015-3-17

Explain more of what you want to do, especially about what you want to do with blobs based on what is in their "neighborhood". Say blob #15 and blob #27 have their centroids or perimeters within 9 pixels of each other - now what????

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