multicolorfits.rescale_image#

multicolorfits.rescale_image(datin, rescalefn='linear', vmin=None, vmax=None, a=None)[source]#

Rescale image data to the [0,1] range with the specified stretch function and manual interval. This is the core scaling operation used by to_grey_rgb() and the GUI previews.

Parameters:

  • datin (array) – Input 2D image data array

  • rescalefn (str) – One of ‘linear’,’sqrt’,’squared’,’log’,’power’,’sinh’,’asinh’, ‘symlog’, or ‘symmetric_log’ (the last requires pysymlog).

  • vmin (float or None) – Minimum data value for the interval. None uses the data (nan)min.

  • vmax (float or None) – Maximum data value for the interval. None uses the data (nan)max.

  • a (float or None) – Optional stretch parameter for symlog / symmetric_log (see make_norm).

Returns:

array – Data rescaled to [0,1]