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

i want to measure transparency of a hazy or foggy image.is there any other parameter that gives me the information of transparency.

Answer 1

[Ameer Hamza]

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');

Answer 2

[Walter Roberson]

https://www.mathworks.com/help/images/ref/imreducehaze.html

The T output is a haze estimate.