Hi everyone,

I want to apply the "roicolor" function. A sample goes like this

load clown
BW = roicolor(X,10,20);
imshow(X,map)
figure,imshow(BW) 

However, I have a 3D image and when I try to apply this function it says
 Error using ==> roicolor at 42
Images with dimensions greater than two are not supported.

So how can I convert my 3D image to 2D.

Thanks in advance

You can use either sum() or mean() to project the 3D image along one
dimension (axis).