Results 211 to 220 of about 5,583,294 (267)

Clinical outcomes of early salvage surgery for residual or enlarging contrast-enhancing lesions after radiotherapy in patients with glioblastoma. [PDF]

Front Oncol
Yamaguchi S, Ishi Y, Nishioka K, Okamoto M, Sawaya R, Oki S, Yamamoto T, Tanei Z, Tanaka S, Aoyama H, Fujimura M.   +10 more
europepmc   +1 more source

The effects of surround contrast on contrast thresholds, perceived contrast and contrast discrimination

Vision Research, 1998
Perceived contrast, contrast detection thresholds and contrast discrimination thresholds were measured in the presence and absence of surrounding patterns of a similar spatio-temporal makeup. In the foveal retina we found that the perceived contrast of the central pattern was reduced by the presence of the contrast surrounds with the effect being ...
Robert J Snowden, Stephen T Hammett, S T Hammett   +2 more
exaly   +3 more sources

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Contrast–contrast asynchronies

Journal of the Optical Society of America A, 2014
We introduce the "contrast-contrast asynchrony," a dynamic stimulus configuration that combines elements of the Shapiro contrast asynchrony with elements of the Chubb contrast-contrast illusion. In the contrast-contrast asynchrony, static textured fields surround two textured fields; one surround has high-contrast texture, and the other has low ...
Alex, Rose-Henig, Arthur G, Shapiro
openaire   +2 more sources

Contrast contrast determines perceived contrast

Optical Society of America Annual Meeting, 1991
A testpatch of visual texture has greater apparent contrast when it is surrounded by a uniform mean gray field than by a background of similar, high contrast texture. Temporally modulating the contrast of surrounding texture induces a substantial antiphase modulation of testpatch apparent contrast.
Charles Chubb, Joshua A. Solomon, George Sperling   +2 more
openaire   +1 more source

CHROMATIC CONTRAST∗

American journal of optometry and archives of American Academy of Optometry, 1970
ABSTRACT Chromatic contrast is of importance in contributing to the visibility of a colored object (10‐minute disc) on a colored background if the luminance contrast is very low. For luminance contrasts from zero to about 0.10.
S K, Guth, A A, Eastman
openaire   +2 more sources