fMRI correlates of corner illusions show that BOLD activation varies gradually with corner angle
نویسندگان
چکیده
منابع مشابه
Novel visual illusions related to Vasarely's 'nested squares' show that corner salience varies with corner angle.
Vasarely's 'nested-squares' illusion shows that 90 degrees corners can be more salient perceptually than straight edges. On the basis of this illusion we have developed a novel visual illusion, the 'Alternating Brightness Star', which shows that sharp corners are more salient than shallow corners (an effect we call 'corner angle salience variation') and that the same corner can be perceived as ...
متن کاملBOLD activation varies parametrically with corner angle throughout human retinotopic cortex.
The Alternating Brightness Star (ABS) is an illusion that provides insight into the relationship between brightness perception and corner angle. Recent psychophysical studies of this illusion have shown that corner salience varies parametrically with corner angle, with sharp angles leading to strong illusory percepts and shallow angles leading to weak percepts. It is hypothesized that the illus...
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When corners are embedded in a luminance gradient, their perceived salience varies linearly with corner angle (Troncoso et al., 2005). Here we hypothesize that this relationship may hold true for all corners, not just corner gradients. To test this hypothesis, we developed a novel variant of the flicker-augmented contrast illusion (Anstis and Ho, 1998) that employs solid (non-gradient) corners ...
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Injuries to the posterolateral corner (PLC) comprise a significant portion of knee ligament injuries. A high index of suspicion is necessary when evaluating the injured knee to detect these sometimes occult injuries. Moreover, a thorough physical examination and a comprehensive review of radiographic studies are necessary to identify these injuries. In this sense, stress radiographs can ...
متن کاملCorner validation based on extracted corner properties
We developed a method to validate and filter a large set of previously obtained corner points. We derived the necessary relationships between image derivatives and estimates of corner angle, orientation and contrast. Commonly used cornerness measures of the autocorrelation matrix estimates of image derivatives are expressed in terms of these estimated corner properties. A candidate corner is va...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2005
ISSN: 1534-7362
DOI: 10.1167/5.12.88