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Sensitivity to spatiotemporal combined luminance and chromaticity contrast


, : Sensitivity to spatiotemporal combined luminance and chromaticity contrast. Journal of the Optical Society of America 71(4): 453-459

Contrast-detection thresholds for various combinations of chromaticity and luminance differences were obtained for spatiotemporal square-wave modulation of a yellow field. The results are expressed in terms of excitation of the Vos-Walraven R,G primaries. For every spatiotemporal frequency the thresholds can be approximated by an ellipse in the red-green plane. Large variations were found in the orientation, magnitude, and eccentricity of the discrimination ellipses. It seems that a simple threshold function appears to be sufficient to describe the experimental data. Although the eye does not perceive hue contrast for high spatial frequencies, its sensitivity is not governed mainly by summation of the red and green channels.

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PMID: 7218074


Other references

Pelletier H., 1972: Geologic notes on Limagne, France. Arkose, limestone, algae, Tertiary.

Weissmann Gary S.; Blake Richard G.; Noyes Charles D.; Karachewski John A.; Maley Michael P.; Bennett George, 2000: Detailed hydrostratigraphy of medial fine-grained alluvial fan deposits; preliminary core and hydrogeologic assessment from Lawrence Livermore National Laboratory. Eos, Transactions, American Geophysical Union: 8, Suppl., Pages F388. 2000.

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Gruneis, P., 1953: Differential diagnosis of acute abdominal pains. Wiener Klinische Wochenschrift 65(17): 326-329

Stoll, P.; Spitzbart, J.; Schilli, W.; Jonas, I., 1993: Growth of the facial skull in adult patients with unilateral lip-maxillary-palatal clefts after early and late secondary bone repair of the maxillary cleft in comparison with normal probands of the same age. Fortschritte der Kiefer- und Gesichts-Chirurgie 38: 88-91

Emmelot, P., 1957: The in vitro incorporation of C14-leucine into the proteins of tumor microsomes and a note on the properties of isolated tumor mitochondria. The incorporation of DL-leucine-1-C14 into the proteins of the combined soluble-microsomal fractions was studied. Active incorporation was found with preparations from two tumors, but little, or none was noted with others. In some of the latter, a...

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