mirror of
https://git.FreeBSD.org/ports.git
synced 2024-12-26 05:02:18 +00:00
19 lines
1.1 KiB
Plaintext
19 lines
1.1 KiB
Plaintext
This program is designed to match up items in two different lists, which may
|
|
have two different systems of coordinates. The program allows the two sets of
|
|
coordinates to be related by a linear, quadratic, or cubic transformation.
|
|
There was a major change in version 0.15: the first stage uses the clever method
|
|
of finding the most likely triangles described in Tabur, Publications of the
|
|
Astronomical Society of Australia, vol 24 , page 189 (2007). This replaces the
|
|
more brute-force-ish method of Valdes et al., Publications of the Astronomical
|
|
Society of the Pacific, vol 107, page 1119 (1995), which was employed in version
|
|
up to 0.14.
|
|
|
|
The program was designed and written to work on lists of stars and other
|
|
astronomical objects, but it might be applied to other types of data. In order
|
|
to match two lists of N points, the main algorithm calls for O(N^6) operations
|
|
(yes, that's N-to-the-sixth), so it's not the most efficient choice. I find
|
|
myself becoming impatient for N >= 100, but your mileage may vary. On the other
|
|
hand, it does allow for arbitrary translation, rotation, and scaling...
|
|
|
|
WWW: http://spiff.rit.edu/match/
|