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Name

iofits - convert FITS from a pixel depth to another without rescaling

Synopsis

iofits [parameter=value]

Description

iofits converts FITS files of any pixel depth to another pixel depth (bits per pixel). Depth is given as in the FITS norm : 
     *     8 bits per pixel, unsigned.
     *     16 bits per pixel, signed
     *     32 bits per pixel, signed
     *     -32 IEEE floating point
     *     -64 IEEE double precision floating point

Parameters

The following parameters are recognized in any order if the keyword is also given:
in=
Input FITS file. No default.
out=
Output FITS file. No default.
bitpix=
requested output BITPIX value. Valid are 8, 16, 32, -32 or -64. No default.

Caveats

In general, decreasing the resolution in number of bits per pixel almost always means loss of precision. No rescaling is done on the data, use this command with care!

Examples

See Also

ccdfits(1NEMO) , fitsccd(1NEMO) , fits(5NEMO)

Data Files

Input/output files shall all comply with FITS format.

The original FITS header of the input FITS file is con- served along, except for the following keywords: NAXIS, NAXISn, BITPIX, BSCALE, BZERO, which are related to the newly created file.

Author

N. Devillard (ESO, within the eclipse package), P. Teuben (NEMO adaptation)

Update History


30-Apr-03    V1.1 NEMO adaptation    PJT

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