Please advise what to do to make the rgb2gray work in Octave.
I found this thread, but still I would like to use the rgb2gray functionality instead of manually calculating for each color channel.
The code that I run:
I = imread('smile.jpg');
G = rgb2gray(I);
The error I get:
error: 'rgb2gray' is undefined near line 10 column6
Additional:
Octave version: 3.6.4
Image package is installed. Version: 2.0.0.
The 'rgb2gray.m' is installed in C:\Octave\share\octave\packages\image-2.0.0
Thanks,
The problem is that you didn't load your packages. When you type pkg list you can find which ones are loaded by an asterisk in front of their names. Load a package with pkg load image.
Having to load a packages is that thing that most users find strange but if you compare with other languages, such as Python, Perl, or C++, would you expect them to import, use, or #include every libraries available in the system by default? See Octave's FAQ for more details.