Re: [Gimp-developer] improving bicubic interpolation

2007-01-29 Thread Michael Schumacher
Von: Sven Neumann <[EMAIL PROTECTED]> > On Sun, 2007-01-28 at 22:04 +0100, [EMAIL PROTECTED] wrote: > > http://bugzilla.gnome.org/show_bug.cgi?id=363775 > > Sorry, but I am unable to follow your way of handling bug reports. If > there's now a new bug that deals with remaining issues in bug #1679

Re: [Gimp-developer] improving bicubic interpolation

2007-01-28 Thread Sven Neumann
Hi, On Sun, 2007-01-28 at 22:04 +0100, [EMAIL PROTECTED] wrote: > In fact that's exactly what I am working on. > > If you look at my last post to the bug you linked above you will see I > started a new bug since this one was getting too long, confused and mixing > a number of issues. > http:

Re: [Gimp-developer] improving bicubic interpolation

2007-01-28 Thread gg
On Sun, 28 Jan 2007 21:05:28 +0100, Sven Neumann <[EMAIL PROTECTED]> wrote: > Hi, > > before you start attacking the bicubic interpolation routines, could you > please have a look at the outstanding bug report for Lanczos: > > http://bugzilla.gnome.org/show_bug.cgi?id=167956 > > Would be nice to

Re: [Gimp-developer] improving bicubic interpolation

2007-01-28 Thread Sven Neumann
Hi, before you start attacking the bicubic interpolation routines, could you please have a look at the outstanding bug report for Lanczos: http://bugzilla.gnome.org/show_bug.cgi?id=167956 Would be nice to get this one closed finally. And we can't release 2.4 as long as it is still open. Sven

Re: [Gimp-developer] improving bicubic interpolation

2007-01-25 Thread gg
Many thanks for the offer. Finally Simon was able to come up with a copy of Keys' paper for me but I will keep your offer in mind since I came accross several references to pdfs on IEEE that may also be useful. Thanks to all for the many positive and helpful replies, and especially to Simon for c

Re: [Gimp-developer] improving bicubic interpolation

2007-01-25 Thread Mukund
Hi Sven and gg, Sven Neumann wrote: > Hi, > > On Mon, 2007-01-22 at 10:13 +0100, [EMAIL PROTECTED] wrote: > >> All references to Keys' work seem to lead to papers published by IEEE and >> available on a per article subscription. I assume the charge for one or >> two articles would be fairly

Re: [Gimp-developer] improving bicubic interpolation

2007-01-25 Thread William Skaggs
Gg, Google Scholar only finds one paper by RG Keys on this topic: Cubic Convolution Interpolation for Digital Image Processing RG KEYS IEEE TRANSACTIONS ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL. ASSP-29, NO. 6, DECEMBER 1981 I was able to download a pdf of that paper using my instituti

Re: [Gimp-developer] improving bicubic interpolation

2007-01-25 Thread Gordon Couger
In the USA the papers are almost universal available thought interlibrary loan. The cost of the service is born by the libraries that lend the material. The service is available at least to some degree world wide though I don't know to what extent and if there are charges. Al1 most all deliveri

Re: [Gimp-developer] improving bicubic interpolation

2007-01-24 Thread Sven Neumann
Hi, On Mon, 2007-01-22 at 10:13 +0100, [EMAIL PROTECTED] wrote: > All references to Keys' work seem to lead to papers published by IEEE and > available on a per article subscription. I assume the charge for one or > two articles would be fairly nominal. Would this be a good use of some of >

[Gimp-developer] improving bicubic interpolation

2007-01-24 Thread gg
In my on-going research to reduce the filter artifacts noted in http://bugzilla.gnome.org/show_bug.cgi?id=166130 , I found many references to a promising improvement on the cubic convolution kernel approach I have been using. As noted in the bug report using a convolution kernel entirely rem