How would I detect gray/white pixels in a picture?

3 views (last 30 days)
I am trying to write a function to detect white-like and gray-like pixels in a given colored picture. I am stuck on how to go about it. Any help is appreciated.
  1 Comment
yanqi liu
yanqi liu on 9 Aug 2022
yes,sir,may be upload your image file to analysis

Sign in to comment.

Accepted Answer

Walter Roberson
Walter Roberson on 9 Aug 2022
Convert for HSV, check for "high" V (near 1) and "small" (near 0) S. You will need to decide on the exact boundaries, depending how "white like" or "gray like" you want to allow.

More Answers (1)

KSSV
KSSV on 8 Aug 2022
REad about find. Gve the pixle value as zero and use find. This will give you the indices.
[y,x] = find(I==0) ; % I is gray image
  1 Comment
Ali Almakhmari
Ali Almakhmari on 8 Aug 2022
But that would require me to manually identifiy the gray pixels and assign them to zero. Which is the thing I am trying to automate with this function.

Sign in to comment.

Community Treasure Hunt

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

Start Hunting!

Translated by