Is it possible to access the alpha value from an RGB image

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aswathy pavithran
aswathy pavithran 2020-6-13
回答： Walter Roberson 2020-6-13
i want to measure transparency of a hazy or foggy image.is there any other parameter that gives me the information of transparency.

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回答（2 个）

Ameer Hamza
Ameer Hamza 2020-6-13
If you have a png image, you can get transparency values using the 3rd output argument of imread()
[img, ~, alpha] = imread('https://upload.wikimedia.org/wikipedia/commons/4/47/PNG_transparency_demonstration_1.png');
Walter Roberson
Walter Roberson 2020-6-13

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