Re: [Gimp-developer] GSOC Project-Fast Adaptive Resampler Tailored

2009-03-10 Thread Craig DeForest
On Mar 10, 2009, at 8:56 AM, Nicolas Robidoux wrote: Hello Rahul: i m a student and interested in gsoc project:Fast Adaptive Resampler Tailored For Transformations Which Mostly Downsample I have read the requirements properly for this project which also includes jacobian

Re: [Gimp-developer] GSOC Project-Fast Adaptive Resampler Tailored

2009-03-10 Thread Nicolas Robidoux
Hello Craig: Numerical Jacobian calculation is not so bad in terms of coding effort The issue is that, if I understand correctly, GEGL's current pure demand-driven structure means that resamplers have no information whatsoever about what other nearby locations are being resampled, and

Re: [Gimp-developer] GSOC Project-Fast Adaptive Resampler Tailored

2009-03-10 Thread Nicolas Robidoux
Hello Rahul: Indeed, the GSoC I suggested can be roughly described as implementing a poor man's version of the scheme Craig describes in http://adsabs.harvard.edu/abs/2004SoPh..2193D Replace circles/ellipses by parallelograms/rectangles, and notice that padding the singular values of the

Re: [Gimp-developer] GSOC Project-Fast Adaptive Resampler Tailored

2009-03-10 Thread Nicolas Robidoux
This being said, what I have in mind in way simpler than what Craig implemented. But if you understand Craig's paper, you probably understand what I want to do. Actually, if I took the time to completely understand Craig's paper, I probably would understand what I want to do. ;-) Nicolas

Re: [Gimp-developer] GSOC Project-Fast Adaptive Resampler Tailored

2009-03-10 Thread Nicolas Robidoux
Rahul: exact area box filtering with sides no less than the input image's inter-pixel distance This was a bit terse: Exact area box filtering with a square box with diameter equal to the inter-pixel distance is exactly bilinear interpolation. So, it's only when the sides are larger than the