Re: [CinePaint] Cant get Bracketing to HDR working

Hartmut,
Thanks for your response. The strange thing is that even images added
through the make -> test case.. menu will produce this error, e.g.
defaults using "add" or "1 2 3 images".

I'll try 0.21-2 and see what results I get. I have also been using
pfstools but so far only for hdr -> jpeg conversion - still have to
figure out how to create hdr images from jpeg (the documentation lacks
:/).

Regards,
Stefan

On 12/18/06, Hartmut Sbosny <[email protected]> wrote:
> Am Montag, 18. Dezember 2006 13:51 schrieb Stefan Podkowinski:
>
> > Hello
> >
> > I recently build cinepaint v.0.21 from gentoo portage tree in order
> > to create HDR images from a set of jpegs. Unfortunately, after
> > selecting three images and confirming "compute response" or "HDR",
> > I just get the following error. Am I missing something or is this a
> > bug?
>
> Hello Stefan,
>
> the method (QR decomposition) used here for solving a last square fit
> fails if the matrix has a rank defect. So far I didn't come across
> with such case with usual images, I implemented firstly only this
> method, because it is fast. There exists an alternative method
> (singular value decomposition - SVD), which works also for defect
> matrices, but is 5-10 times slower. Since plugin version 0.5.1
> (CinePaint v0.21-2) both methods have been inserted, as default
> behavior QR is tried at first and if it fails, SVD is used. This can
> be changed under "Settings" -> "Method for solving the last square
> fit". But I am afraid, the result will nethertheless not be very
> good, because the  algorithm used here for recovering the camera
> response function is not very stable for noisy data. At
>
>   http://sourceforge.net/projects/pfstools/
>
> you can download a set of command line tools for HDR creation, wherein
> a more stable algorithm is realized (takes some more time). It would
> be probably a good idea to adapt that for the plugin.
>
> Btw: Shortly I will put in the CVS a new version, which can read
> EXIF data and can correct small displacements (offsets)
> between images. The current state is a bit burdensome in respect
> of this.
>
> Greetings,
> Hartmut
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share your
> opinions on IT & business topics through brief surveys - and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Cinepaint-users mailing list
> Cinepaint-users-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> https://lists.sourceforge.net/lists/listinfo/cinepaint-users
>

-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys - and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV