“Correcting for short-range spatial non-linearities of CRT-based output devices” by Klassen and Bharat
Conference:
Type(s):
Title:
- Correcting for short-range spatial non-linearities of CRT-based output devices
Presenter(s)/Author(s):
Abstract:
Most graphical output devices exhibit what has been termed spatial
non-linearity: the effect of setting two adjacent pixels to a given
value is not the same as the sum of the effects of setting those two
pixels to the same value in isolation: checkerboards of different
frequencies do not have the same apparent luminance. We present
a method applicable to bit-mapped devices for compensating for
short-range spatial non-linearity in error-diffused images. The
modification to error diffusion is such that it can be used with
any error diffusion technique. In essence, it consists of finding
the influence of the neighbouring (output) pixels when making the
decision of whether to turn on a given pixel, and passing errors
computed accordingly
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