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makefries: undistortion correction file

The "makefries" program is used to create a file that makes it possible to "undistort" an image.

"makefries" will invoke the "fries" program from the "evalccd" suite.

Usage

The program is invoked by the command line:

  makefries [options]

Options

The only option the program accepts is "apex". With this option, the fries.frs file will be tailored for a conversion from KappaCCD ".kcd" to ".sfrm" files for use with APEX2 and SAINT. See How to convert KappaCCD images for use with APEX2 and SAINT

Without options, "makefries" will create an undistorted frame that is the same size as the original detector.

If you want to create a different frame size with accompanying different pixel size, please run the "fries" program manually.

For the actual undistortion of images, one can use imagesum with the "undistorted" option.

Prerequisites

The program requires a file "distorpol.vic" as written by makedistor. It will locate this file in the calibration directory as long as there is one image file in the local directory. "makefries" will also use a "detalign.vic" file if it is available.

Output

The program makes a file "fries.frs" that can be copied to the calibration directory.

Note

Since the package is not included in the standard collect package, and is only required in some special cases (e.g. for integration in programs that can not work with distorted detectors). The makefries step is not a standard step in the calibration of the detector.

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