octave-dev

[OctDev] Mixing images and graphs

[Justus P. <Jus...@UL...>]

Hi,

The upcoming release of Gnuplot (>4.0) offers new plot styles "with
image" and "with rgbimage". If I understand correctly, this allows
displaying images directly in the gnuplot window, and overlaying them
with graphs.

To me, this is a killer feature that I've used extensively in Matlab,
and that I'm missing badly in octave.

For future octave development, I propose to consider unifying graphics
handling by throwing out image viewers altogether, relying instead on
gnuplot for all image display, and to support overlaying plots over
images in octave.

Justus

--=20
Justus H. Piater, Ph.D.         http://www.montefiore.ulg.ac.be/~piater/
Institut Montefiore, B28        Phone: +32-4-366-2279
Universit=E9 de Li=E8ge, Belgium    Fax:   +32-4-366-2620

Re: [OctDev] Mixing images and graphs

[Quentin S. <qsp...@ie...>]

Justus Piater wrote:

>Hi,
>
>The upcoming release of Gnuplot (>4.0) offers new plot styles "with
>image" and "with rgbimage". If I understand correctly, this allows
>displaying images directly in the gnuplot window, and overlaying them
>with graphs.
>
>To me, this is a killer feature that I've used extensively in Matlab,
>and that I'm missing badly in octave.
>
>For future octave development, I propose to consider unifying graphics
>handling by throwing out image viewers altogether, relying instead on
>gnuplot for all image display, and to support overlaying plots over
>images in octave.
>
>Justus
>  
>
I agree. Using ImageMagick was a necessary hack because there was no 
other way to display images, but it doesn't provide means to add titles, 
labels, and axes. There might be somebody who still wants it for 
something, so I suggest moving the old image display functions into the 
extras directory.

Quentin

Re: [OctDev] Mixing images and graphs

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

On Feb 28, 2005, at 5:18 AM, Justus Piater wrote:

> Hi,
>
> The upcoming release of Gnuplot (>4.0) offers new plot styles "with
> image" and "with rgbimage". If I understand correctly, this allows
> displaying images directly in the gnuplot window, and overlaying them
> with graphs.
>
> To me, this is a killer feature that I've used extensively in Matlab,
> and that I'm missing badly in octave.
>
> For future octave development, I propose to consider unifying graphics
> handling by throwing out image viewers altogether, relying instead on
> gnuplot for all image display, and to support overlaying plots over
> images in octave.
>

Excellent plan.  This should be done in octave rather than octave-forge
though.  Be sure to add a configure test for gnuplot 4.0.

When I've needed this feature in the past I've used epstk.  It works
quite nicely.

Now I'm writing the image on a BLT plot in Tcl/Tk using an image marker
of just the right size.  It has worked well enough, but now I need to
use quadrilaterals rather than pixels so I need a better solution.

- Paul

Re: [OctDev] Mixing images and graphs

[Justus P. <Jus...@UL...>]

Paul Kienzle <pki...@us...> wrote on Mon, 28 Feb 2005
19:51:50 -0500:

> Excellent plan.  This should be done in octave rather than octave-forge
> though.  Be sure to add a configure test for gnuplot 4.0.

Just to avoid any misunderstandings: I'm not proposing to implement
this myself :-). I wish I had the time...

Should I repost to, say, octave-graphics? Or should I file it as a
"bug"?

Justus

--=20
Justus H. Piater, Ph.D.         http://www.montefiore.ulg.ac.be/~piater/
Institut Montefiore, B28        Phone: +32-4-366-2279
Universit=E9 de Li=E8ge, Belgium    Fax:   +32-4-366-2620