MATLAB Central Newsreader - Displaying 3 channel data of values larger than 1

Displaying 3 channel data of values larger than 1

kees de Kapper — Thu, 08 Oct 2009 08:10:05 -0400

Hi all,

I've got 3 channel data (call it pseudo RGB, e.g. 100x100x3) with values larger than 1.
When I push this image to imshow or imagesc it complains that it cannot be displayed since values are <0 or >1 (no true color data).

How can I solve this problem, in other words, how can I display the image scaled between min and max values without affecting the original data.

thanx in advance,
Kees

Re: Displaying 3 channel data of values larger than 1

Darren Rowland — Thu, 08 Oct 2009 09:40:05 -0400

If you don't want the scaling to effect the original you can either make a copy of the array or apply the scaling inline to the call to imagesc e.g.

imagesc((A-min(A(:)))/(max(A(:))-min(A(:))))

Re: Displaying 3 channel data of values larger than 1

kees de Kapper — Thu, 08 Oct 2009 10:03:05 -0400

> "Darren Rowland" <darrenjremovethisrowland@hotmail.com> wrote in message

Thanx for reply.

In the solution you mentioned, there is still an affection of the CData stored by the image-handle.
Isn't there a solution using colormaps?