Method and apparatus for visually measuring the chromatic characteristics of a display
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United States of America Patent
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Issued Date -
Oct 16, 2003
app pub date -
Apr 10, 2002
filing date -
Apr 10, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for visually measuring the chromatic characteristics of a display is disclosed, which includes the measurement of the tonal response curves of the primaries and the white point of the display. For a primary, the luminance of a uniform luminance pattern and the average luminance of a non-uniform luminance pattern are visually adjusted so that they are equal, in which the non-uniform luminance pattern comprises interlaced pixels with several different luminance levels. From several such testing patterns the characterization parameters of the tonal response curve of the primary can be obtained. Accurate white point of a display can be measured by selecting a unique gray color of kwon chromaticity coordinate in a sequence of graphic user interfaces if the provided chromaticity characteristics of the primaries are accurate
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