MATLAB: Segment the circular regions

circleImage Processing Toolboximfindcircles

i got the center and radius using imfindcircles… how to segment the circular regions out of the image with the centers and radii….

 [centers, radii] = imfindcircles(rgb,[20 25]);

Best Answer

What does segment out mean to you? You can create a circular mask from code in the FAQ. http://matlab.wikia.com/wiki/FAQ#How_do_I_create_a_circle.3F

Then you can use the mask as an index, or multiply it by the image to produce an image blackened everywhere except in the mask.

Related Solutions

MATLAB: Want to find the circular regions

Compute the circularities and determine the circularity that is the dividing line between a circle and non-circle

labeledImage = bwlabel(binaryImage);
props = regionprops(labeledImage, 'Area', 'Perimeter');
allAreas = [props.Area];
allPerimeters = [props.Perimeter];
circularities = allPerimeters .^ 2 ./ (4 * pi * allAreas);
acceptableCircs = circularities < 4; % Or whatever works
indexes = find(acceptableCircs);
circBlobsOnly = ismember(labeledImage, indexes);
imshow(circBlobsOnly);

MATLAB: How can i separate all the connected regions in a binary image and display them individually.

Use bwlabel() and ismember

[labeledImage, numRegions] = bwlabel(binaryImage);
props = regionprops(labeledImage, 'Area')
% Compute all the areas.
allAreas = [props.Area]
% Display each blob in its own figure.
for k = 1 : numRegions
    thisRegion = ismember(labeledImage, k);
    figure;
    imshow(thisRegion);
    drawnow;
end

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Related Solutions

MATLAB: Want to find the circular regions

MATLAB: How can i separate all the connected regions in a binary image and display them individually.

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