matlab.io.fits.setBscale

Reset FITS image scaling

Syntax

setBscale(fptr,BSCALE,BZERO)

setBscale(fptr,BSCALE,BZERO) resets the scaling factors in the primary array or image extension according to the equation

output = (FITS array) * BSCALE + BZERO

The inverse formula is used when writing data values to the FITS file.

This only affects the automatic scaling performed when the data elements are read. It does not change the BSCALE and BZERO keyword values.

import matlab.io.*
fptr = fits.openFile('tst0012.fits');
fits.setBscale(fptr,2.0,0.5);
data = fits.readImg(fptr);
fits.closeFile(fptr);