If you have fvj3, section 8.7 gives some examples of using fft on some image processing; in particular diffraction patterns. There are some older writings/pubs, but they refer older versions of J. I am happy to try to answer specific questions, but often need some time to consider the question and balance other responsibilities. I often am a day or more behind in the forums and others usually answer questions before I get a chance. A wonderful forum! Best, Cliff
Jonathan Lettvin wrote: > Gentlemen, > > You have been a wealth of information and tips. Thank you for keeping me in > this loop. I am building skills rapidly because of these excellent > publications: > > - "J for C programmers" > - "Fractals Visualizations and J" > - "J 602 Reference Card" > - "J Companion for Statistical Calculations" > - "J Tutorial and Statistical Package" > - "With J: Image Processing 2: Color Spaces" > > It is possible to extract more information from images than is commonly > believed. In C++ I have successfully extracted: > > 1. multiple points from diffraction patterns 1 order of magnitude below > traditional Nyquist limit > 2. boundaries dominated by noise floor data > > This C++ code has reached a level of complexity difficult to maintain. J > appears to manage much of that complexity. My challenge is to convert my > clear ideas into clear J. ... -- Clifford A. Reiter Mathematics Department, Lafayette College Easton, PA 18042 USA, 610-330-5277 http://www.lafayette.edu/~reiterc ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
