منابع مشابه
Vernier acuity, crowding and cortical magnification.
When a vernier target is flanked by optimally positioned lines, foveal vernier discrimination is strongly degraded (Westheimer and Hauske, 1975). We confirmed this observation (Experiment I) and have mapped out a 2 dimensional "perceptive field" for crowding in the fovea using a 2 dot target (Experiment II). Crowding was also measured in peripheral vision, using either small flanking dots as ma...
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Gravitational lensing can amplify the apparent brightness of distant sources. For most lensing geometries, images that are significantly magnified are part of multiply-imaged systems, but that need not always be the case. We consider the extent to which lensing can produce large magnifications without creating more than one detectable image. One possibility is that lensing produces a single ima...
متن کاملMultiple Level Crowding: Crowding at the Object Parts Level and at the Object Configural level.
In crowding, identification of a peripheral target in the presence of nearby flankers is worse than when the target appears alone. Prevailing theories hold that crowding occurs because of integration or "pooling" of low-level features at a single, relatively early stage of visual processing. Recent studies suggest that crowding can occur also between high-level object representations. The most ...
متن کاملCortical magnification theory fails to predict visual recognition.
The sense of form is poor in indirect view. Yet the cortical magnification theory asserts that the disadvantage can be made up by scaling the image size according to the spatial variation in the mapping of the retina onto the cortex. It is thus assumed that all visual information passes through a functionally homogeneous neural circuitry, with the spatial sampling of input signals varying acros...
متن کاملMultiple magnification images based micropositioning for 3D micro assembly
This paper presents micropositioning system using feedback of multiple magnification images from CCD cameras mounted on an optical microscope. In order to guarantee of the accurate micropositioning to micro assembly system, high precise sensors are required. But many kinds of sensors, which are used in macro world, have insufficient resolution and size. The visual data from an optical microscop...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2010
ISSN: 1534-7362
DOI: 10.1167/10.7.1339