How to find percentage of white pixels in a binary image?

조회 수: 23 (최근 30일)
Miraj Khalid
Miraj Khalid 2021년 6월 14일
답변: Simon Allosserie 2021년 6월 14일
I took this image and converted it to binary image. then i filtered the image to remove the noise. after that i applied the dilate and erode process to make it more clear, afterthat i want to find the %age of white pixels which are actually the micro-cracks in a solar panel. i have used the code but I'm not getting any result. kindly take a look on the .m file to understand better.
any help will be apprecited.
thanks in advance.

채택된 답변

Simon Allosserie
Simon Allosserie 2021년 6월 14일
Hi
You could simply use nnz(A), which gives the number of non-zero elements in the matrix A, and numel(A), which gives the total number of elements in A. As white is '1' and black is '0' in your binary image, using nnz(A)/numel(A) gives you the percentage of white pixels.
See https://nl.mathworks.com/help/matlab/ref/nnz.html and https://nl.mathworks.com/help/matlab/ref/double.numel.html

추가 답변 (0개)

카테고리

Help CenterFile Exchange에서 Import, Export, and Conversion에 대해 자세히 알아보기

제품


릴리스

R2017a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by