Get the pixel index value of a particular area of an image
18 views (last 30 days)
Show older comments
Piyum Rangana
on 5 Mar 2017
Commented: Image Analyst
on 5 Mar 2017
Hi, here is my sudo code.
im=imread('myImage');
B=im2bw(im);
label=bwlabel(C);
max(max(label));
for j=1:max(max(label))
%%%%%The answer code goes here %%%%%%
end
As I mentioned in the code I am going to convert the RGB image into black and white image and then labels it.Just I want is the how to get the index value of pixels of each labeled area in to arrays separately. According to my image there are five labels and I want to get index values of pixels in each labeled areas in to five arrays. thanx !
0 Comments
Accepted Answer
Image Analyst
on 5 Mar 2017
You don't need to do max(max(label)) because that just gives the number of regions, but has to scan every pixel in the image to do it, and you can get it directly from bwlabel:
[labeledImage, numberOfRegions] = bwlabel(B);
I have no idea what your "C" was.
And I don't know your definition of the "index value of each pixel". Is that the value of the labeled image at that point? Is it the (row, column) location of each non-zero pixel? Or something else? Why do you need it anyway? Why is the binary or labeled images not enough?
2 Comments
Image Analyst
on 5 Mar 2017
For example, to get the rows and columns of blob #7 of the labeled image:
[rows, columns] = find(labeledImage == 7);
More Answers (0)
See Also
Categories
Find more on Computer Vision with Simulink in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!