MATLAB: Vein Detection in Angiogram image

angiogram imagesImage Processing Toolboximage segmentation

There are veins in above image. I need to find out the location of pixels at which veins are present.

I tried to do this:

img=imread('segmented plus orignal image 1\aa00001.jpg');
bi=im2bw(img); imshow(bi)

But still, it is not clear.

Best Answer

You may want to try edge detection followed by some image morphological operations (e.g. dilation, erosion) and region flood-filling.

Also, if your results from im2bw are as depicted in the comment above, the bwareaopen function may be helpful.

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MATLAB: Image subtraction for vessel segmentation in angiogram image

you could try enhancing the image , it all depends on the type of noise present in the image, for example histeq or finding the edges using canny or sobel edge detection to get an approximate location of the region of interest and eliminating the rest ..

MATLAB: Finding circles in a thresholded image

This is what I ended up doing:

clear all, clc
T2 = imread('T2.png');
%Threshold image
BW = T2 > 100;%Lower number = more white
BW2 = BW;
ext = logical(ones(numel(BW(:,1)),1));
BW2 = [ext BW2 ext];
BW2 = imdilate(BW2,ones(3));
BW2 = imfill(BW2,'holes');
BW2 = imerode(BW2,ones(3));
BWout = BW2(:,2:end-1);
imshow(T2)
[centers, radii, metric] = imfindcircles(BWout,[10 200]);%Finds circles between a b pixels 
viscircles(centers, radii,'EdgeColor','b');%Draws on edge
Ar = radii'*3.14;%Finds area 
%Outputs center, radius and Area
centers
radii
Ar

Best Answer

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MATLAB: Image subtraction for vessel segmentation in angiogram image

MATLAB: Finding circles in a thresholded image

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