Is there a way to make imshow in octave behave more like Matlab?

Question

Hello,

I'm currently migrating some computer vision work I'd previously been doing in Matlab to Octave. For the most part, it's been a smooth transition, except for one annoyance.

I often use the imshow() procedure to view an image. In the viewer I get in Matlab, I'm able to inspect individual pixels to see their value. For example, if I was looking at a connected-components labled image, I could click on a blob and see the actual value of the pixels in it.

Unfortunately, I've not found a way to do this in Octave. I get a viewing window, but it doesn't seem to have any capability to inspect individual pixels. Does anyone know how to emulate this behavior in Octave? Thanks.

Answer 1

I don't have imshow in my matlab (r2007b) or in my octave (no octave-forge). I am going to guess it is image after an imread. try

type imshow

from matlab to see what's going on internally; if that is the case, I am going to guess you could do

F = imread(filename);
image(F);   %to show the entire image
image(F(1:100,1:100));    %to show a corner, etc.

you might want to also try pcolor (in matlab, not sure about octave).

hth,