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Distinct mechanisms for the representation of moving and static objects
- Visual Cognition
, 2002
"... The visual system has been suggested to integrate different views of an object in motion. We investigated differences in the way moving and static objects are represented by testing for priming effects to previously seen (“known”) and novel object views. We showed priming effects for moving objects ..."
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Cited by 8 (1 self)
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The visual system has been suggested to integrate different views of an object in motion. We investigated differences in the way moving and static objects are represented by testing for priming effects to previously seen (“known”) and novel object views. We showed priming effects for moving objects across image changes (e.g., mirror reversals, changes in size, and changes in polarity) but not over temporal delays. The opposite pattern of results was observed for objects presented statically; that is, static objects were primed over temporal delays but not across image changes. These results suggest that representations for moving objects are: (1) updated continuously across image changes, whereas static object representations generalize only across similar images, and (2) more short-lived than static object representations. These results suggest two distinct representational mechanisms: a static object mechanism rather spatially refined and permanent, possibly suited for visual recognition, and a motion-based object mechanism more temporary and less spatially refined, possibly suited for visual guidance of motor actions. Interacting in our natural environments entails perceiving objects moving continuously either because we move or the objects in our environment move. As a result, the images of objects that fall on our retinas vary over time in properties, such as the object’s position, orientation, or size. Recognition of objects across these image changes has been extensively studied when the objects are presented
Image Analysis Using Modulated Light Sources
, 2001
"... With the development of high-speed CMOS imagers, it is possible to acquire and process multiple images within the imager, prior to output. We refer to an imaging architecture that acquires a collection of images and produces a single result as multiple capture single image (MCSI). In this paper we d ..."
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Cited by 7 (3 self)
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With the development of high-speed CMOS imagers, it is possible to acquire and process multiple images within the imager, prior to output. We refer to an imaging architecture that acquires a collection of images and produces a single result as multiple capture single image (MCSI). In this paper we describe some applications of the MCSI architecture using a monochrome sensor and modulating light sources. By using active (modulating) light sources, it is possible to measure object information in a manner that is independent of the passive (ambient) illuminant. To study this architecture, we have implemented a test system using a monochrome CMOS sensor and several arrays of color LEDs whose temporal modulation can be precisely controlled. First, we report on experimental measurements that evaluate how well the active and passive illuminant can be separated as a function of experimental variables, including passive illuminant intensity, temporal sampling rate and modulation amplitude. Seco...
Developmental changes in line bisection: A result of callosal maturation
- Neuropsychology
, 2003
"... Normal adults tend to bisect horizontal lines to the left of the objective middle, especially when using the left hand. This bias has been attributed to the dominance of the right hemisphere in spatial attention. The authors investigated the effect of hand use and line position in visual line bisect ..."
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Cited by 6 (5 self)
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Normal adults tend to bisect horizontal lines to the left of the objective middle, especially when using the left hand. This bias has been attributed to the dominance of the right hemisphere in spatial attention. The authors investigated the effect of hand use and line position in visual line bisection in right-handed children and adults, classified into 4 different age groups: 10–12, 13–15, 18–21, and 24–53 years (N � 98). All 4 groups showed the characteristic leftward bias when using the left hand. When using the right hand, the youngest group showed a rightward bias, whereas the other 3 groups all showed a leftward bias. This suggests a shift from contralateral to right-hemispheric control during puberty and may reflect maturation of the corpus callosum. Most studies investigating visual and tactile line bisection have shown that normal right-handed adults tend to bisect horizontal lines and rods to the left of the center, a phenomenon that is often called pseudoneglect (Bowers & Heilman, 1980). One prominent interpretation for this phenomenon is that the two hemispheres differ with respect to the allocation
An action sequence withheld in memory can delay execution of visually guided actions: The generalization of response compatibility interference
- Journal of Experimental Psychology: Human Perception & Performance
, 2008
"... Withholding an action plan in memory for later execution can delay execution of another action, if the actions share a similar (compatible) action feature (i.e., response hand). This phenomenon, termed compatibility interference (CI), was found for identity-based actions that do not require visual g ..."
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Cited by 4 (1 self)
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Withholding an action plan in memory for later execution can delay execution of another action, if the actions share a similar (compatible) action feature (i.e., response hand). This phenomenon, termed compatibility interference (CI), was found for identity-based actions that do not require visual guidance. The authors examined whether CI can generalize to both identity-based and location-based actions that require visual guidance. Participants withheld a planned action based on the identity of a stimulus and then immediately executed a visually guided action (touch response) to a 2nd stimulus based on its color identity (Experiment 1), its spatial location (Experiment 2), or an intrinsic spatial location within an object (Experiment 3). Results showed CI for both left- and right-hand responses in Experiment 1. However, CI occurred for left- but not right-hand responses in Experiment 2 and 3. This suggests that CI can generalize to visually guided actions under cognitive control but not to actions that invoke automatic visual-control mechanisms where the left hemisphere may play a special role (C. Gonzalez, T. Ganel, & M. Goodale, 2006). The code occupation account for CI (G. Stoet & B. Hommel, 2002) is also discussed.
Computational Perceptual Attention
, 2000
"... This dissertation describes CPA, a general-purpose mechanism for expressing and implementing attention policies that control the allocation of resources among sensory processing tasks in a robot or other advanced intelligent system. A wide variety of attention policies can be expressed in this mecha ..."
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Cited by 4 (0 self)
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This dissertation describes CPA, a general-purpose mechanism for expressing and implementing attention policies that control the allocation of resources among sensory processing tasks in a robot or other advanced intelligent system. A wide variety of attention policies can be expressed in this mechanism, which also supports soft real-time constraints on perceptual processing. Intelligent systems can become inundated with data, resulting in perceptual overload and a consequent inability to formulate a timely or appropriate response. Perceptual
2006: “Evaluating New Wave Reductionism: the Case of Vision,” British Journal for the Philosophy of Science 57
"... This paper inquires into the nature of intertheoretic relations between psychology and neuroscience. This relationship has been characterized by some as one in which psychological explanations eventually will fall away as otiose, overthrown completely by neurobiological ones. Against this view it wi ..."
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Cited by 4 (0 self)
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This paper inquires into the nature of intertheoretic relations between psychology and neuroscience. This relationship has been characterized by some as one in which psychological explanations eventually will fall away as otiose, overthrown completely by neurobiological ones. Against this view it will be argued that it squares poorly with scientific practices and empirical developments in the cognitive neurosciences. We anal-yse a case from research on visual perception, which suggests a much more subtle and complex interplay between psychology and neuroscience than a complete take-over of the former by the latter. In the case of vision, cross-theory influences between psychology and neuroscience go back and forth, resulting in refinement in both disciplines. We interpret this case study as showing that: (1) Mutual co-evolution of psychological and neurobiological theories, exemplifying persisting top-down influences from psychology, is a more empirically adequate way to describe psychoneural theory relations than a view on co-evolution, favoured by
Cortical basis of communication: local computation, coordination, attention
- Neural Netw
, 2009
"... Human communication emerges from cortical processing, known to be implemented on a regular repetitive neuronal substratum. The supposed genericity of cortical processing has elicited a series of modeling works in computational neuroscience that underline the information flows driven by the cortical ..."
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Cited by 3 (1 self)
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Human communication emerges from cortical processing, known to be implemented on a regular repetitive neuronal substratum. The supposed genericity of cortical processing has elicited a series of modeling works in computational neuroscience that underline the information flows driven by the cortical circuitry. In the minimalist framework underlying the current theories for the embodiment of cognition, such a generic cortical processing is exploited for the coordination of poles of representation, as it is reported in this paper for the case of visual attention. Interestingly, this case emphasize how abstract internal referents are built to conform to memory requirements. This paper proposes that these referents are the basis for communication in humans, which is firstly a coordination and an attentional procedure with regard to their congeners.
Another look at the two visual systems hypothesis: The argument from illusion studies
- Journal of Consciousness Studies
"... The purpose of this paper is to defend what I call the action-oriented coding theory (ACT) of spatially contentful visual experience. Integral to ACT is the view that conscious visual experience and visually guided action make use of a common subject-relative or ‘egocentric ’ frame of ..."
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Cited by 2 (1 self)
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The purpose of this paper is to defend what I call the action-oriented coding theory (ACT) of spatially contentful visual experience. Integral to ACT is the view that conscious visual experience and visually guided action make use of a common subject-relative or ‘egocentric ’ frame of
Active Perception: Interactive Manipulation for Improving Object Detection
"... Abstract — In this paper, we address the problem of object detection for robots. Unlike traditional object detection systems, vision in robotics is not limited to passively perceiving the environment. We propose active perception method in which the robot actively manipulates and moves in the enviro ..."
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Cited by 1 (0 self)
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Abstract — In this paper, we address the problem of object detection for robots. Unlike traditional object detection systems, vision in robotics is not limited to passively perceiving the environment. We propose active perception method in which the robot actively manipulates and moves in the environment in order to find an object. Our algorithm chooses actions by greedily maximizing mutual information at each step. In extensive experiments with our robots, we show that perceiving the object while actively manipulating it substantially improves the object detection performance. I.
