matlab.io.fits.setHCompSmooth

Set smoothing for images compressed with HCOMPRESS

Syntax

setHCompSmooth(fptr,smooth)


Description

setHCompSmooth(fptr,smooth) sets the smoothing to be used when compressing an image with the HCOMPRESS algorithm. Setting either the scale or smoothing parameter causes the algorithm to operate in lossy mode.

This function corresponds to the fits_set_hcomp_smooth function in the CFITSIO library C API.

Examples

import matlab.io.*
data = int32(50*ones(256,512,'double') + 10 * rand([256 512]));
fptr = fits.createFile('myfile.fits');
fits.setCompressionType(fptr,'HCOMPRESS');
fits.setHCompSmooth(fptr,1);
fits.createImg(fptr,'long_img',[256 512]);
fits.writeImg(fptr,data);
fits.closeFile(fptr);
fitsdisp('myfile.fits','mode','full');