As I mentioned in the now deleted thread, I'll try to do a test of the Adam Block nearest neighbor method (using the CCDStack data reject procedures) and compare it to Bicubic b-spline. I'm not at all sure if I can do a meaningful test, but I'll give it a try. I'm also not the person to ask about the full mathematical background I might add - that would be the guy that did this
masterpiece.
The thing that worries me about the nearest neighbor is the way it distorts the image. But every time I try it, it seems to work well.
James