Free-energy and illusions: the cornsweet effect.
Free-energy and illusions: the cornsweet effect.
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DOI:
10.3389/fpsyg.2012.00043
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发表时间:
2012
影响因子:
3.8
通讯作者:
Friston KJ
中科院分区:
文献类型:
--
作者:
Brown H;Friston KJ
In this paper, we review the nature of illusions using the free-energy formulation of Bayesian perception. We reiterate the notion that illusory percepts are, in fact, Bayes-optimal and represent the most likely explanation for ambiguous sensory input. This point is illustrated using perhaps the simplest of visual illusions; namely, the Cornsweet effect. By using plausible prior beliefs about the spatial gradients of illuminance and reflectance in visual scenes, we show that the Cornsweet effect emerges as a natural consequence of Bayes-optimal perception. Furthermore, we were able to simulate the appearance of secondary illusory percepts (Mach bands) as a function of stimulus contrast. The contrast-dependent emergence of the Cornsweet effect and subsequent appearance of Mach bands were simulated using a simple but plausible generative model. Because our generative model was inverted using a neurobiologically plausible scheme, we could use the inversion as a simulation of neuronal processing and implicit inference. Finally, we were able to verify the qualitative and quantitative predictions of this Bayes-optimal simulation psychophysically, using stimuli presented briefly to normal subjects at different contrast levels, in the context of a fixed alternative forced choice paradigm.
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影响因子:
2.9
作者:
Feldman H;Friston KJ
通讯作者:
Friston KJ
影响因子:
4.3
作者:
Friston K
通讯作者:
Friston K
影响因子:
8.6
作者:
RUDERMAN, DL;BIALEK, W
通讯作者:
BIALEK, W
影响因子:
1.9
作者:
MUMFORD, D
通讯作者:
MUMFORD, D
DOI:
10.1073/pnas.96.9.5245
发表时间:
1999-04-27
影响因子:
11.1
作者:
Lotto, RB;Williams, SM;Purves, D
通讯作者:
Purves, D