Abstract
We show how to compute and to use the wavelength-dependent optical transfer
function (OTF) to create color matches between spatially patterned images. We
model the human OTF as a defocused optical system with a circular aperture. In
our model the defocus arises from axial chromatic aberration and
wavelength-independent aberrations. From the computed OTF it is apparent that
high-spatial-frequency components of the image can play little role in contrast
and color appearance and that in the spatial-frequency range from 5 to 20
cycles/deg the visual system is dichromatic, because there is no contrast in the
short-wavelength receptor signal. We show how to use the wavelength-dependent
OTF to match color images across displays by setting matches in corresponding
spatial-frequency bands. Because chromatic aberration so affects the OTF, this
new procedure is a significant improvement over the conventional procedure of
setting matches point by point.
© 1994 Optical Society of America
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