How do I find the percentage for the area of white colour over the area of the full image?
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Nursyahirah Hafidz on 10 May 2018
This is an image i have eroded and dilated. How do i find the percentage of the white ?
John BG on 10 May 2018
this is John BG <mailto:email@example.com firstname.lastname@example.org>
When one zooms in it turns out that KSSV answer includes a lot of grey pixels wrapping the thick white dots that shouldn't be considered aprt of the pixels.
KSSV code renders a white area of
0 0 67
0 0 67
0 0 67
0 5 63
73 73 122
KSSV says the white dots cover 15% of the image.
Yet, when we binarize the image
the image only has a 5.7% of white pixels.
Comment: Since the question clearly mentions 'full image' there's no need the crop the image.
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thanks in advance for time and attention
Hello...when you save the image....the image has white background in all the corners...so I included the command to crop it...it is a commonsense that the user wants the ratio from whole image ...not a small part of it...
More Answers (2)
I = imread('ED.png') ; % REad the image
I = imcrop(I) ; % crop the required part
I = rgb2gray(I) ; % convert to gray image
whitepixels = nnz(I) ;
totalpixels = numel(I) ;
iwant = whitepixels/totalpixels
Nursyahirah Hafidz on 11 May 2018
Image Analyst on 11 May 2018
How do you want to display it? In a static text label? In a table control? Over the image in the text overlay?
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