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TBitPix

Unit DeLaFitsCommon

Type type

TBitPix = (biUnknown, bi64f, bi32f, bi08u, bi16c, bi32c, bi64c);

Description

BITPIX keyword. The value field shall contain an integer. The absolute value is used in computing the sizes of data structures. It shall specify the number of bits that represent a data value in the associated data array The FITS Standard, Sect. 4.4.1

The bit depth of data values. Specifies the number of bits that represent a data value.

Value is determined by BITPIX and accepts one of standard types:

  • bi64f ~ BITPIX = -64 - IEEE double precision floating-point
  • bi32f ~ BITPIX = -32 - IEEE single precision floating-point
  • bi08u ~ BITPIX = 8 - Character or unsigned binary integer
  • bi16c ~ BITPIX = 16 - 16-bit two’s complement binary integer
  • bi32c ~ BITPIX = 32 - 32-bit two’s complement binary integer
  • bi64c ~ BITPIX = 64 - 64-bit two’s complement binary integer