Image Segmentation of binary image

Hi,

I'm trying to identify the banana from the other fruits in an binary Image so that the result only show the banana, I used se=strel('disk',25) but the area of orange was larger so the result show the orange not banana. can you help me with the problem.

Thank you in advance.

[Image Analyst]

Not without the image we can't. You forgot to attach it. I also have no idea why you're even using strel(). That's used for doing morphological operations, which I'm not convinced you need.

[Sadeq Ebrahimi]

yes strel() didnt work, then I used regionprops and all I could do is to draw a line around the fruit, I want to only show the banana, here is the code:

I=imread('B.jpg');
bw=im2bw(I,0.7);
bw1=~bw;
Ifilled=imfill(bw1,'holes');
I2=bwareaopen(Ifilled,1000);

[B,L] = bwboundaries(I2,'noholes');
numregion = max(L(:));
imshow(label2rgb(L));

I1=regionprops(I2,'MajorAxisLength');
stats = [I1.MajorAxisLength];
keepers =  find(stats > 225);
imshow(I2);
for index=1:length(keepers)
    outline = B{keepers(index)};
    line(outline(:,2),outline(:,1),'color','r','LineWidth',2);
end

Sorry I forgot the picture, here you are:

And Thank you for your help!

[KALYAN ACHARJYA]

Can you attach the original picture?

[Sadeq Ebrahimi]

Ok

[KALYAN ACHARJYA]

As you already located the roi (red boundary), is there any issue now?

[Sadeq Ebrahimi]

yes, delete all the other fruits and only show banana in binary

Answer 1

[Image Analyst]

This looks like homework, not a real world problem. So I'll give you hints. Use the color thresholder app on the Apps tab to create a mask for yellow. Then use regionprops() to find out which blobs have a major axis some factor longer than the minor axis:

labeledImage = bwlabel(binaryImage);
props = regionprops(labeledImage, 'MajorAxisLength', 'MinorAxisLength');
aspectRatios = [props.MajorAxisLength] ./ [props.MinorAxisLength]
bananas = aspectRatios > 2; % Or whatever.
% Extract binary image of just the banana blobs
bananasImage = ismember(bananas, find(bananas));