Re: 'rgb2gray' undefined

[marco atzeri]

On 5/16/2012 10:23 PM, 4evrplan wrote:
> I'm completely new to Octive (and MATLAB, FREEMAT, etc.).  Everything seems
> to work, except that I get an error when I try to use rgb2gray:
>
> octave:1>  im1=imread('test.jpg');
> warning: your version of GraphicsMagick limits images to 16 bits per pixel
> octave:2>  tmp1 = uint8(im1);
> octave:3>  tmp2 = rgb2gray(tmp1);
> error: `rgb2gray' undefined near line 3 column 8
> octave:3>
>
> So, I tried FreeMat and got a similar error.  I'm using Octave3.6.1_gcc4.6.2
> in Windows 7 64 bit.  I tried running it as an Admin, and it made no
> difference.


rgb2gray is part of the image package
  http://octave.sourceforge.net/image/function/rgb2gray.html
not of octave core

try "pkg list" and "pkg load image"