Re: [OctDev] Feature request: imread matlab compatibility

[Paul K. <pki...@us...>]

On Dec 11, 2003, at 9:55 PM, Andy Adler wrote:

>>> In octave imread returns a greyscale image even when you read color
>>> images if you only have one variable to catch the return value. In
>>> matlab, you actually get a 3D array of size y,x,3 if you only specify
>>> one variable.
>>>
>>> Can this be changed?
>>>
>> It can now that Octave supports 3D arrays.  Anyone interested
>> in implementing it?
>
> I could take a stab at it in a few weeks. However
>
> 1. Is the current imread implementation OK?
>    ie. are we satisfied with piping stuff through the
>        imagemagick 'convert'?

It saves us work if convert is there.  Is it much slower than
using readjpg or readpng directly?

>
> 2. What is octave-forge supposed to support?
>
>    N-d arrays are experimental, so if we modify the code,
>    the octave-forge won't work for all those people that
>    we're recommending should use 2.1.50.

At configure time we can create the function has_nD.m which
returns either true or false, then test at run-time what we want
to return.

- Paul