🚀 go-pugleaf

I had an early CCD camera.  One way to expand the dynamic range is to
take two images, each at different iris settings (or, with radiographs,
different intensities on the light box).  The resulting images
can be combined if you know the shape of the H+d curve (relating optical
density to exposure nominally, but can be thought of as a characteristic
curve relating density to intensity on the CCD).  This is tricky,
but has been done.  The characteristic curve for this can be measured
by taking both images using a standard "step wedge"  from Kodak

James Balter
james@rover.bsd.uchicago.edu
"If the hat fits, slice it!"