Examples of achromatic

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They are achromatic and of variable size and may occur singly or in pairs lying side by side.
The observer's task was to set the test surface in the center of the scene to be achromatic.
We used achromatic settings to quantify changes in the visual system because, unlike unique hue settings, achromatic settings probe color space simultaneously in all directions.
Additionally, it is far from clear when achromatic microscopes were first employed.
The essential substrate for achromatic vision is luminance contrast, the difference between the luminance of an object and its background.
In both conditions, 1.0 indicates no masking by achromatic components at neighboring orientations.
Here we document that the induced contrast asynchrony disappears when the surrounds are achromatic and the center lights are modulated near the equiluminant axis.
The solid symbols show the settings to achromatic when the test stimuli are embedded in each of the chromatic surrounds.
The monopolar stimulus combines the appropriate chromatic with the appropriate achromatic stimulus to produce some edge enhancement in a given cell type.
Difference in temporal appearance associated with activity in the chromatic and achromatic systems.
Chromatic flows required less cone contrast to convey shape than did achromatic flows, thus ruling out luminance artifacts as a problem.
Regions differentially activated by chromatic versus achromatic geometric patterns showed no significant differential response related to the coherence0incoherence of local color differences.
The gap effect: chromatic and achromatic visual discrimination as affected by field separation.
The present results provide evidence that development of waveforms to low spatial-frequency achromatic reversal and chromatic onset stimuli follow different time courses.
These results suggest that contour integration by the chromatic mechanisms relies more on shor t-range interactions in comparison to the achromatic mechanism.
The numbers associated with the chromatic chips reveal substantially less consistency than is found for the achromatic ones.

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