From owner-help-octave at bevo dot che dot wisc dot edu  Thu Jan 30 03:29:17 1997
Subject: Image Processing Toolbox
From: Kurt Hornik <Kurt dot Hornik at ci dot tuwien dot ac dot at>
To: Shahid dot Masud at ee dot qub dot ac dot uk
Cc: help-octave at bevo dot che dot wisc dot edu
Date: Thu, 30 Jan 1997 10:28:44 +0100

>>>>> On Thu, 30 Jan 97 08:04:58 GMT,
>>>>> Shahid dot Masud at ee dot qub dot ac dot uk said:

> Hi,
> Has anybody used the image processing toolbox available from octave's
> contribution archive. I tried to use it on version 1.1.1 and 2.0.2 but
> to no luck. A function called "isreal" has been used in all .m files of
> image toolbox but is not defined anywhere.

You can use e.g.

function y = isreal (x)
  
  # Usage:  isreal (x)
  #
  # Returns 1 if x is real (scalar, vector or matrix), otherwise 0.
  
  y = all (all (x == real (x)));
  
endfunction

To use imagep, you also need to do the following in conv2.m:

	elseif (strcmp(area, "valid")
	                             *
Add a `)' where the * is.

-kh