Hello Ed,
thanks for your reply.
That I trying to mean with 'reduce' is some of
projection operation (op) like in PDL::Reduce module
that performs "(op)over" to reduce to N-1
dimension after some operation over the set of
(3,x,y, n) to (3,x,y) rgb images. I mean
a composed rgb image from a set of (layer) n rgb images.
For example:
$imn-> info : pdl D [3,nx,ny,n]
$im=$imn->reduce('op',2);
$im-> info : pdl D [3,nx,ny]
Then, maybe I need to introduce some "sort"
operation in order that when I reduce to one
composed $im image each layer in $imn overlap
the following layer. But, I did not realize how to do that
using some pdl trick.
Thanks a lot for your help
Regards
El jue, 24 oct 2024 a las 9:12, Ed . (<ej...@hotmail.com>) escribió:
> Hi Guillermo,
>
> I believe the situation you're describing is you have effectively a series
> of (3,x,y) images. You mention "reducing", but you haven't said what you
> mean by that - would it turn that series of images into one image?
>
> wpic is intended to write out a single image, so an ndarray with multiple
> images won't work with that. To write out a series of images as a movie you
> could use wmpeg, or just to store the data you could use
> https://metacpan.org/pod/PDL::IO::FastRaw and specifically writefraw.
> Otherwise to write each image in its own file you could use something like:
>
> $_->wpic(sprintf "img%03d.png", $count++) for $pdl->dog;
>
> Does that help?
>
> Best regards,
> Ed
> ------------------------------
> *From:* Guillermo P. Ortiz <gor...@exa.unne.edu.ar>
> *Sent:* 23 October 2024 4:42 PM
> *To:* pdl-devel@lists.sourceforge.net <pdl-devel@lists.sourceforge.net>;
> pdl-gene...@lists.sourceforge.net <pdl-gene...@lists.sourceforge.net>
> *Subject:* [Pdl-devel] project ordered sequence image
>
> Hello everyone,
>
> I have created a pdl with structure (3,size_x,size_y,np)
> in order to manage different layer features to compose an rgb
> image.
>
> The idea that I can not connect yet is how to "reduce" over dim 3
> to project to 3 X s_x X s_y rgb image in ordered fashion sequence. For
> example,
> suppose that for np=0, 1 and 2, in the resulting image is only view of 2
> that
> is allowed by 1 and 0 layers, in that order.
>
> I am trying to use wpic command from PDL::IO::Pic module
> to convert via for example pnmtopng using options for it.
> There are hashes like {FLAGS => options} used for options
> {CONVERTER => 'pnmtopng'} indicating which conversor to use.
> But is seems to be intended of rgb 3(4) X s_x X s_y
>
> Thanks for your attention in advance
>
> Regards
>
>
> --
>
>
> Dr. Guillermo P. Ortiz
> Electromagnetismo Aplicado
> Dto. Física, Facultad de Ciencias Exactas
> Universidad Nacional del Nordeste
> Avda Libertad 5460, Campus UNNE.
> W3404AAS Corrientes, Argentina.
> (+54) 379-4424678 interno 4613
> gortiz* at *unne edu ar
>
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