DOCUMENTATION PATCH_UP INTERPOLATION

Open the web page : http://z4/civ/interpolation.htm To display the current queue file http://z4/civ/civbot/TODO.txt ; right-click to refresh

Q : What is patch_UP ? A : patch_up is a 2D thin-plate interpolation scheme, it divide the domain in sub-rectangles, compute the spline on each sub-domains and connect them . Q : Why this domain division ? A : The cholesky factorization is very time consuming , with the standard PC, we can not process more than thousands points domains.

On this first page you can select which experiment you would like to process. An experiment is defined by its configuration file : the .CIV file http://www.civproject.org/DOC%5Cfile_format_CIV.htm

If you are using a distributed version you HAVE TO use network path (UNC) for your selected files (as: \\computer-name\shared-folder).

After appropriate files selection and a click on the processing options button you access to this new html page :

Most of the options are explicits or already explained in the CIV PROCESSING DOC

Sub-rectangles and Ro

The first field is the number of points in each sub-rectangles, I suggest a value around 400. If you want faster process choose 200.

The Ro coefficient is the smooth parameter used in the thin plate interpolation , it’’s hard to select the right value , not too high, not too low .. Joel is working on it ;)

Output Grid

The spline is evaluated on a regular grid defined by the min-max of the input field. You can choose the number of point in each direction.

Please don’’t forget to select the right image pairs …..