image processing using Matlab

Hi

I have the following result of segmentation

How can I improve the results?

1) I want to improve the appearance to get the vessels more smooth.

2) I want to extract the oval-like part of the vessels in the middle of the image.

Any suggestions?

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Here is a link to the image

https://copy.com/GT6n8EF82BKw

Answer 1

[Evan]

For your first question:

Is this strictly for appearances? If so, does medfilt2 do what you want?

 rawImg = rgb2gray(imread('seg_vessel.jpg'));
 nbhd = [2 2]; %play around with neighborhood size to get the smoothness you want
 smoothedImg = medfilt2(rawImg,nbhd);
 figure;imagesc(rawImg); colormap(gray)
 figure;imagesc(smoothedImg); colormap(gray)

[Nisreen Sulayman]

thanks Mr. Evan, I've tried medfilt2 ... can you suggest another thing ... the above code didn't gave the desired effect... I tried to use nbhd=[3 3] unfortunately it separates the vessels path

Answer 2

[SRI]

inputImage = imread('seg_vessel.tif');

grayImage = rgb2gray(inputImage);

binaryImage = im2bw(grayImage,level);

[B,W,D,T] = bwboundaries(binaryImage);

imshow(W)

Hi Kindly Look into the code, this might be the result which you had expected

Answer 3

[SRI]

inputImage = imread('seg_vessel.tif');

grayImage = rgb2gray(inputImage);

level = graythresh(grayImage);

binaryImage = im2bw(grayImage,level);

[B,W,D,T] = bwboundaries(binaryImage);

imshow(W)

Sorry Use this one

[Nisreen Sulayman]

I haven't got the desired result this is what I got ...

I want to get ride of small line and elongated parts which give "coarse look" of the image above

[SRI]

Hi

You need to crop that oval part alone in this image

[Image Analyst]

You can use imopen() to snip off pointy parts or use imclose() to blur out the boundary.