Can we find the transparency of an overlay on an image ?
1 view (last 30 days)
Show older comments
If I have an image with a transparent overlay on it, can we find the percentage of transparency from the alpha channel of the image?
6 Comments
Walter Roberson
on 5 Oct 2017
Edited: Walter Roberson
on 5 Oct 2017
Could you post a sample image?
Will the line always be straight? Is the line in a known position or does it need to be detected?
Answers (1)
Walter Roberson
on 17 Aug 2017
Yes.
if isinteger(YourAlphaData)
tAD = im2double(YourAlphaData);
else
tAD = YourAlphaData;
end
percent_transparent = 100 * (1 - tAD);
0 Comments
See Also
Categories
Find more on Lighting, Transparency, and Shading in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!