How to incude octave-image in Octave?

**satyamM** · February 6th, 2013

Hi, I am using Ubuntu 12.04 and just installed Octave as I've to do a bit of image processing.

I also installed Octave-image package/add-on from software center.

I don't know how to include this package/add-on in octave or does it get included by itself in it as soon as it is installed?

I tried to produce complement of a image by following command after installing octave-image:

Code:

h = imcomplement(f)

But this produced following error:

Code:

error: `imcomplement' undefined near line 11 column 5

.

Please help anyone.

**satyamM** · February 6th, 2013

I need some urgent help fellas. Please help as soon as you can.
Your help is much appreciated.

And sorry for the spelling error in "include" in main subject.

**satyamM** · February 6th, 2013

To add more information about my problem, I am executing one octave script.

My octave script reads like:

I=imread('b.jpg');
imshow(I)
J=imcomplement(I);
figure, imshow(J)

It is saved in a file named "a.m".

Now whenever I want to execute this a.m script I type on octave terminal: a
It gets executed but produces following error:

octave-3.2.4:13> a
error: `imcomplement' undefined near line 5 column 3
error: called from:
error: /home/satyam/Desktop/a.m at line 5, column 2
octave-3.2.4:13>

So what's the problem, Do i need to include octave-image in Octave?
How?

**steeldriver** · February 6th, 2013

by default it appears to get loaded automatically, but it will depend on your /etc/octave3.2.conf and/or local rc files I think

You should be able to check what packages are loaded with

Code:

octave> pkg list

and if necessary load manually with

Code:

octave> pkg load image

**satyamM** · February 6th, 2013

@steeldriver:

octave>pkg list produces:

Code:

satyam@ubuntu:~$ octave > pkg list
error: no such file, `list'
error: source: error sourcing file `list'
satyam@ubuntu:~$

octave > pkg load image produces:

Code:

satyam@ubuntu:~$ octave > pkg load image
error: no such file, `load'
error: source: error sourcing file `load'
satyam@ubuntu:~$

Now what?

**steeldriver** · February 6th, 2013

sorry I meant to type 'pkg list' at the octave prompt - not the bash shell prompt

Code:

steeldriver@vm~ $ octave
.
.
.
octave:2> pkg list
Package Name  | Version | Installation directory
--------------+---------+-----------------------
       image *|  1.0.14 | /usr/share/octave/packages/3.2/image-1.0.14
octave:3> version
ans = 3.2.4
octave:4>

**satyamM** · February 6th, 2013

Mine one says something like following:

octave-3.2.4:14> pkg list
Package Name | Version | Installation directory
--------------+---------+-----------------------
image | 1.0.14 | /usr/share/octave/packages/3.2/image-1.0.14

octave-3.2.4:15> version
ans = 3.2.4
octave-3.2.4:16>

now what?

**steeldriver** · February 6th, 2013

did you try

Code:

pkg load image

you can get help on the pkg command (including auto loading options) by typing

Code:

help pkg

**satyamM** · February 6th, 2013

@steeldriver:

I was not doing "pkg load image" at octave prompt, thus image package was not loading.

I did it as you said, now my code is compiling and producing desired output.
Thank you steeldriver.