Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A normalization model of visual search predicts single trial human
  fixations in an object search task   When searching for an object in a scene, how does the brain decide where to
look next? Theories of visual search suggest the existence of a global
attentional map, computed by integrating bottom-up visual information with
top-down, target-specific signals. Where, when and how this integration is
performed remains unclear. Here we describe a simple mechanistic model of
visual search that is consistent with neurophysiological and neuroanatomical
constraints, can localize target objects in complex scenes, and predicts
single-trial human behavior in a search task among complex objects. This model
posits that target-specific modulation is applied at every point of a
retinotopic area selective for complex visual features and implements local
normalization through divisive inhibition. The combination of multiplicative
modulation and divisive normalization creates an attentional map in which
aggregate activity at any location tracks the correlation between input and
target features, with relative and controllable independence from bottom-up
saliency. We first show that this model can localize objects in both composite
images and natural scenes and demonstrate the importance of normalization for
successful search. We next show that this model can predict human fixations on
single trials, including error and target-absent trials. We argue that this
simple model captures non-trivial properties of the attentional system that
guides visual search in humans.

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The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph