Is your feature request related to a problem? Please describe.
this is a feature request for an intensity transform so that the transformed image has a linear trend in it's cumulative intensity density

see also
https://github.com/facebookresearch/CovidPrognosis/blob/5a8731e86f263b77263ef5dee8faae9a4cc0d661/covidprognosis/data/transforms.py#L83