imshow(I, [low high]

The help manual shows how to scale a (grayscale) image using low and high

imshow(I, [low high]

It doesn't tell you how to extract the values that have been used. Is this possible to take a current image and obtain the low and high values?

thanks Jason

[Walter Roberson]

duplicate is at http://www.mathworks.com/matlabcentral/answers/13292-extract-imadjust-values

Answer 1

[Andreas Goser]

The choice of the LOW and HIGH parameters is depending on your application. The lowest and highest values of your picture (you could obtain with MIN and MAX commands) may not the most useful parameters.

[Jason]

I actually use this:

J = imadjust(IM,stretchlim(IM),[0 1]);

imshow(J);

Then I have a second image that I want to be scaled to the same values and so want to extract the scaling from the 1st image.

[Walter Roberson]

Jason, please do not open multiple questions on the same topic.

[Jason]

Sorry Walter!

Jason

Answer 2

[Image Analyst]

Jason, you don't have to know. Simply do it this way:

imshow(imageArray, []);

and it will do it for you.