[ptx] i would like to help.

[juaquin anderson]

i like these stitch algorithms you folks are working on.

the whole thing is great fun for photography.

enblend is realy interesting.  its amazing what a difference it makes.

i want to help.  i have alot of knowledge about algorithms and mathematics.

i have had some experience with programming specialized pattern recognition algorithms in the 80's.  

i have been trying to see where i could add to the effort.  mabe  i could write a slick antialiasing algorithm.  antialiasing is important for a quality output.

antialiasing is a tricky subject.  especially where nonlinear projections are involved.  you want to filter out frequencys below 1/2 sample rate before sampleing,  but the nonlinear projection makes that tricky.

its hard to avoid two things,  a slow algorithm,  and a noisy signal.

to get a realy clean anti aliasing, you could filter the signal, then sample it.  but the nonlinear mappings make that tricky.  you could sample with a bunch of samples spread out like a sync, but then it wouldn't be clean and it would be slow.

i developed an algorithm that would be great for this application.  it works by filtering the input images before they are resampled and remaped.  it uses a filter that is fast to compute and is clean and correct for the nonlinearitys of whatever mapping you apply.   no big convolutions.

i would like to write this code as a library or a utility.  

i don't have much experiance with this modern programming environment.  i don't know the programmers interface and librarys that you are useing.  i do have alot of experience writing in C.

the utility or library, needs as input the image and the parameters of the projection remaping that is to be applied,  and it needs to be able to output a filtered image,  of the same reolution.  basicaly i need to know that there is a particular tiff library.   and the library that does the transform from planar image to panorama image with (y,p,r,v,a,b,c).  basically the parameters for the nonlinear mapping.

also i need to know if the ptstitcher interpolates its input image pixel values with bilinear, or bicubic.  bicubic is probably best.


i just need help getting started with writing a little utility.  And testing it.

thanks
juaquin  

__________________________________________________________________
Introducing the New Netscape Internet Service. 
Only $9.95 a month -- Sign up today at http://isp.netscape.com/register

Netscape. Just the Net You Need. 

New! Netscape Toolbar for Internet Explorer
Search from anywhere on the Web and block those annoying pop-ups.
Download now at http://channels.netscape.com/ns/search/install.jsp