MATLAB: How can i calculate a variance of each BLOB in image

image processingImage Processing Toolbox

hello every one; i need to know how to calculate a variance of each blob contains in one image, thank you in advance

Best Answer

Ask regionprops to return PixelValues for the blobs.

measurements = regionprops(labeledImage, 'PixelValues');

Then for the kth blob:

blobVariance(k) = var(measurements(k).PixelValues);

Related Solutions

MATLAB: How to select an object of a bw image

With regionprops():

labeledImage = bwlabel(binaryImage);
measurements = regionprops(labeledImage, 'Area');
allAreas = [measurements.Area]

See my Image Segmentation Tutorial for a full demo: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

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

Best Answer

Related Solutions

MATLAB: How to select an object of a bw image

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

Related Question