Version française
Home     About     Download     Resources     Contact us    

This site is updated infrequently. For up-to-date information, please visit the new OCaml website at

Browse thread
New Major OCaml App
[ Home ] [ Index: by date | by threads ]
[ Search: ]

[ Message by date: previous | next ] [ Message in thread: previous | next ] [ Thread: previous | next ]
Date: 2000-07-27 (17:36)
From: David McClain <dmcclain@a...>
Subject: New Major OCaml App
I have just completed another major mathematical analysis program written as
a hybrid OCaml and NML/IPLib program. The OCaml is essential for robustness,
rapid development, near C speeds, and for prefiltering data for the
inherently loosely typed and unsafe NML/IPLib math core.

The program solves for optical aberrations in a sensor based on a random
collection of observed point targets at various sub-pixel phasings. This is
a very difficult, high dimensional, very sparse, optmization problem based
on a Levenberg-Marquardt optimization algorithm. Each iteration of the
program requires typically 900-1000 two dimensional FFT's at anywhere from
128x128 to 512x512 computation cells. It replaces a previous program
developed by another on our team that takes about 40 hours to compute the
solution with one that computes on your average desktop Pentium in about 5

You can download a postscript document that describes the math and the
program at

Thanks again to all the wonderful team at INRIA for such a fabulous

- DM