how to find the area of black region in image....?
2 views (last 30 days)
Show older comments
I have to find the blank area in the image...ie its value is 0..how to find the area..help me out...
0 Comments
Answers (3)
Andrei Bobrov
on 15 May 2012
s = regionprops(YourImage == 0,'Area','PixelIdxList')
add
I = imread('44298455.png');
i0 = im2bw(I,graythresh(I));
s = regionprops(i0 == 0,'Area','PixelIdxList')
4 Comments
Walter Roberson
on 15 May 2012
Is it the portion outside of the oval whose area you are trying to find?
Walter Roberson
on 15 May 2012
sum(YourImage(:) == 0)
2 Comments
Walter Roberson
on 15 May 2012
Are there parts of the image which contain blank areas that you do _not_ wish to have included? The code I gave does not give the area of the whole image, only of the blank area.
Image Analyst
on 15 May 2012
Try this:
binaryImage = grayScaleImage == 0;
measurements = regionprops(binaryImage, 'Area');
allAreas = [measurements.Area]
allAreas will be an array of areas. Each physically separated, isolated, black region will have its own area in the array.
4 Comments
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!