Overlay mask on to original image

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Joe Perkins
Joe Perkins 2017 年 6 月 28 日
回答済み: Image Analyst 2017 年 6 月 28 日
Hi - Coming to the end of writing a script to first segment particles and then save each individually. Ideally I would only like the particle pixels (without background in boundary box) so I am attempting to create masks of each particle, overlay this, make each binary ROI (value of 0) 'transparent' so that the particle is on show with white (value of 1) surroundings - I have tried modifying other similar examples on here but none of them seem to work and the saved image is just the cropped image mask or a big white box ... any advice would be greatly appreciated.
%I = original image
%binaryImage3 = logical mask created earlier on
folder = 'c:/Users/ezxjp1/Documents/MATLAB/ParticleImages'
for k = 1 : numberOfParticles
% Find the bounding box of each particle.
thisParticleBoundingBox = particleMeasurements(k).BoundingBox;
% Extract out this particle into it's own image.
subImage = imcrop(I, thisParticleBoundingBox);
% Create binary mask of subplot and overlay
subImageMask = imcrop(binaryImage3, thisParticleBoundingBox);
subImageMaskUnit8 = im2uint8(subImageMask);
% Get size of original image
[rowssubImage, colssubImage, numberOfColorChannelssubImage] = size(subImage);
[rowssubImageMaskUnit8, colssubImageMaskUnit8, numberOfColorChannelssubImageMaskUnit8] = size(subImageMaskUnit8);
% If size of mask does not match original, resize mask
if rowssubImageMaskUnit8 ~= rowssubImage || colssubImage ~= colssubImageMaskUnit8
subImageMaskUnit8 = imresize(subImageMaskUnit8, [rowssubImage colssubImage]);
end
Inew = subImage.*repmat(subImageMaskUnit8,[1,1,3]);
pngFileName = sprintf('Particle_%d.png', k);
fullFileName = fullfile(folder, pngFileName);
saveas(gcf, fullFileName);
end
  1 件のコメント
Guillaume
Guillaume 2017 年 6 月 28 日
I'm not really clear what it is you're trying to do. Presumably, your particleMeasurements come from regionprops, isn't what you want the Image property returned by regionprops?

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回答 (1 件)

Image Analyst
Image Analyst 2017 年 6 月 28 日

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