slicing image by histogram
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Hi I have image of connected text I was trying to use histogram vlues to segment it/slice it. Basicaly im=imread('test.jpg') 1. take histogram of the test image 2. slice/segment the image wherever the value of histogram is below certain number what would be the best way to do that? thanks
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Image Analyst
on 10 Feb 2012
See my BlobsDemo tutorial on this topic:
Basically
binaryImage = grayImage >= lowThreshold & grayImage <= HighThreshold;
labeledImage = bwlabel(binaryImage);
measurements = regionprops(labeledImage, 'all');
You supply values for lowThreshold and highThreshold of course.
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Tarik Razak
on 10 Feb 2012
1 Comment
Image Analyst
on 11 Feb 2012
regionpropos() is not a function. Try regionprops() like I suggested. ALso make sure your image is grayscale:
[rows columns numberOfColorChannels] = size(grayImage);
if numberOfColorChannels > 1
grayImage = grayImage(:,:,2); % Take green channel only
% grayImage = rgb2gray(grayImage); % Alternative, weighted average of RG&B
end
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