displaying classification image

hello community,

I have a classified image with class labels 1, to 5. I want to display it with different colors. I can do that with choosing a particular colormap like jet. But the problem is i dont have a complete control over colors that colormap assings to the image. What i meant, is lets say i want to display 1 as green, and 2 as blue so that it represent true class color.

So my questions is how to have a complete control of colors that is used in colormaps ?Is there any interactive way of do this, say assign green for 1, blue for 2, something like class mapping in ENVI ?

thanks sukuchha

Answer 1

[Sean de Wolski]

Use label2rgb with custom built colormap:

for blue green red

Limage = your_label_image;
map = [0 0 1; 0 1 0; 1 0 0]; %etc nx3 colormap of RGB triplets
I = labelrgb(Limage,map)

You could use the lines() function to generate a random colormap as well.

doc lines
doc label2rgb

[Sukuchha]

thanks,

i got your point, implemented with label2rgb way ! So there is no interactive way to do it ? with some sort of color picker ?

[Sean de Wolski]

Something like colormapeditor to make the colormap?

doc colormapeditor

[Sukuchha]

thanks sean,

thats what i wanted to have!

have a wonderful x-mas and new year !

[T]

if we have set of images how to do that?