bundles / astropy latest / astropy / io / fits / hdu / compressed / _tiled_compression / compress_image_data

function

`astropy.io.fits.hdu.compressed._tiled_compression:compress_image_data`

source: /astropy/io/fits/hdu/compressed/_tiled_compression.py :476

Signature

   def     compress_image_data (    image_data    ,    compression_type    ,    compressed_header    ,    compressed_coldefs      )

Summary

Compress the data in a CompImageHDU.

Extended Summary

The input HDU is expected to have a uncompressed numpy array as it's .data attribute.

Parameters

image_data : `~numpy.ndarray`: The image data to compress
compression_type : str: The compression algorithm
compressed_header : `~astropy.io.fits.Header`: The header of the compressed binary table
compressed_coldefs : `~astropy.io.fits.ColDefs`: The ColDefs object for the compressed binary table

Returns

nbytes : `int`: The number of bytes of the heap.
heap : `bytes`: The bytes of the FITS table heap.

Aliases

astropy.io.fits.hdu.compressed._tiled_compression.compress_image_data