Abstract:
:It is shown that a convolution with certain reasonable receptive field (RF) profiles yields the exact partial derivatives of the retinal illuminance blurred to a specified degree. Arbitrary concatenations of such RF profiles yield again similar ones of higher order and for a greater degree of blurring. By replacing the illuminance with its third order jet extension we obtain position dependent geometries. It is shown how such a representation can function as the substrate for "point processors" computing geometrical features such as edge curvature. We obtain a clear dichotomy between local and multilocal visual routines. The terms of the truncated Taylor series representing the jets are partial derivatives whose corresponding RF profiles closely mimic the well known units in the primary visual cortex. Hence this description provides a novel means to understand and classify these units. Taking the receptive field outputs as the basic input data one may devise visual routines that compute geometric features on the basis of standard differential geometry exploiting the equivalence with the local jets (partial derivatives with respect to the space coordinates).
journal_name
Biol Cybernjournal_title
Biological cyberneticsauthors
Koenderink JJ,van Doorn AJdoi
10.1007/BF00318371subject
Has Abstractpub_date
1987-01-01 00:00:00pages
367-75issue
6eissn
0340-1200issn
1432-0770journal_volume
55pub_type
杂志文章abstract::Flies have the capability to visually track small moving targets, even across cluttered backgrounds. Previous computational models, based on figure detection (FD) cells identified in the fly, have suggested how this may be accomplished at a neuronal level based on information about relative motion between the target a...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-004-0518-y
更新日期:2004-12-01 00:00:00
abstract::A fundamental problem in neuroscience, to which Prof. Segundo has made seminal contributions, is to understand how action potentials represent events in the external world. The aim of this paper is to review the issue of neural coding in the context of the rodent whiskers, an increasingly popular model system. Key iss...
journal_title:Biological cybernetics
pub_type: 杂志文章,评审
doi:10.1007/s00422-008-0290-5
更新日期:2009-06-01 00:00:00
abstract::A multisegment, multijoint model of a falling animal is presented to examine the effectiveness of a two-stage control scheme in a zero-momentum self-righting maneuver. The model contains a much larger number of degrees of freedom than is required to execute a self-righting maneuver and is thus capable of providing mul...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050488
更新日期:1998-11-01 00:00:00
abstract::The vestibuloocular reflex and other oculomotor functions are subserved by populations of neurons operating in parallel. This distributed aspect of the system's organization has been largely ignored in previous block diagram models. Neurons that transmit oculomotor signals, such as those in the vestibular nucleus (VN)...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00204592
更新日期:1989-01-01 00:00:00
abstract::Neurons in sensory cortices are often assumed to be "feature detectors", computing simple and then successively more complex features out of the incoming sensory stream. These features are somehow integrated into percepts. Despite many years of research, a convincing candidate for such a feature in primary auditory co...
journal_title:Biological cybernetics
pub_type: 杂志文章,评审
doi:10.1007/s00422-003-0445-3
更新日期:2003-11-01 00:00:00
abstract::This paper continues the investigation of a three-loop representation of the segmental muscle stretch reflex system introduced in a preceding communication. Frequency response characteristics were computed for open-loop conditions, control and disturbance signal inputs under a variety of conditions: (i) "in parallel" ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00326681
更新日期:1981-01-01 00:00:00
abstract::A central pattern generator (CPG) is built to control a mechanical device (plant) inspired by the pyloric chamber of the lobster. Conductance-based models are used to construct the neurons of the CPG. The plant has an associated function that measures the amount of food flowing through it per unit of time. We search f...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/PL00007963
更新日期:2000-01-01 00:00:00
abstract::We develop a novel optimal control algorithm to change the phase of an oscillator using a minimum energy input, which also minimizes the oscillator's transversal distance to the uncontrolled periodic orbit. Our algorithm uses a two-dimensional reduction technique based on both isochrons and isostables. We develop a no...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-018-0764-z
更新日期:2019-04-01 00:00:00
abstract::Motion control of musculoskeletal systems for functional electrical stimulation (FES) is a challenging problem due to the inherent complexity of the systems. These include being highly nonlinear, strongly coupled, time-varying, time-delayed, and redundant. The redundancy in particular makes it difficult to find an inv...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-008-0258-5
更新日期:2008-12-01 00:00:00
abstract::Synaptic release was simulated using a Simulink sequential storage model with three vesicular pools. Modeling was modular and easily extendable to the systems with greater number of vesicular pools, parallel input, or time-varying parameters. Given an input (short or long tetanic trains, patterned or random stimulatio...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-003-0432-8
更新日期:2004-01-01 00:00:00
abstract::In bursting excitable cells such as pancreatic beta-cells and molluscan Aplysia neuron cells, intracellular Ca2+ ion plays a central role in various cellular functions. To understand the role of [Ca2+]i (the intracellular Ca2+ concentration) in electrical bursting, we formulate a mathematical model which contains a fe...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00202449
更新日期:1990-01-01 00:00:00
abstract::Mathematical or computational models of activity-dependent neural competition typically impose competition in anatomically fixed networks by the use of synaptic normalisation, for which there is very little experimental support. Recent experimental evidence, however, strongly implicates neurotrophic factors in neural ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050311
更新日期:1996-12-01 00:00:00
abstract::Walking behavior is modulated by controlling joint torques in most existing passivity-based bipeds. Controlled Passive Walking with adaptable stiffness exhibits controllable natural motions and energy efficient gaits. In this paper, we propose torque-stiffness-controlled dynamic bipedal walking, which extends the conc...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-014-0625-3
更新日期:2014-12-01 00:00:00
abstract::This paper proposes multiport parallel and multidirectional intraconnected associative memories of outer product type with reduced interconnections. Some new reduced order memory architectures such as k-directional and k-port parallel memories are suggested. These architectures are, also, very suitable for implementat...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-009-0310-0
更新日期:2009-05-01 00:00:00
abstract::Neural field models have been successfully applied to model diverse brain mechanisms like visual attention, motor control, and memory. Most theoretical and modeling works have focused on the study of the dynamics of such systems under variations in neural connectivity, mainly symmetric connectivity among neurons. Howe...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-012-0544-0
更新日期:2013-04-01 00:00:00
abstract::The local extraction of motion information from brightness patterns by individual movement detectors of the correlation-type is considered in the first part of the paper. A two-dimensional field theory of movement detection is developed by treating the distance between two adjacent photoreceptors as a differential. In...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00205969
更新日期:1988-01-01 00:00:00
abstract::Illumination allows solid object perception to be obtained and depicted by a shading pattern produced by lighting. The shading cue, as one of solid perception cues (Gibson 1979), was investigated in regard to a white corrugated wave shape, using computer graphic device: Tospix-2. The reason the corrugated wave was cho...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00317774
更新日期:1988-01-01 00:00:00
abstract::Fast as possible (time optimal) single joint movements throughout the body are characterized by the triphasic (3 pulse) pattern of activation in the agonist and antagonist muscles. Simulation studies using a sixth order, non-linear model were undertaken to determine the relationship between time optimal movement and t...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00338824
更新日期:1987-01-01 00:00:00
abstract::This paper deals with the problem of separating the spectra of signal and noise in ensembles where the signal can be considered as an invariant component and the noise as a stationary additive background. Several methods are discussed and compared on the basis of a statistical analysis of the first two moments of the ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00337392
更新日期:1979-03-19 00:00:00
abstract::This work proposes a model of visual bottom-up attention for dynamic scene analysis. Our work adds motion saliency calculations to a neural network model with realistic temporal dynamics [(e.g., building motion salience on top of De Brecht and Saiki Neural Networks 19:1467-1474, (2006)]. The resulting network elicits ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-012-0542-2
更新日期:2013-04-01 00:00:00
abstract::Experimental studies have shown that responses of ventral intraparietal area (VIP) neurons specialize in head movements and the environment near the head. VIP neurons respond to visual, auditory, and tactile stimuli, smooth pursuit eye movements, and passive and active movements of the head. This study demonstrates ma...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-012-0491-9
更新日期:2012-07-01 00:00:00
abstract::The operation of a hierarchical competitive network model (VisNet) of invariance learning in the visual system is investigated to determine how this class of architecture can solve problems that require the spatial binding of features. First, we show that VisNet neurons can be trained to provide transform-invariant di...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220100284
更新日期:2002-01-01 00:00:00
abstract::For the Ornstein-Uhlenbeck neuronal model a quantitative method is proposed for the estimation of the two parameters characterizing the unknown input process, namely the neuron's mean input per unit time mu and the infinitesimal standard deviation per unit time sigma. This method is based on the experimentally observe...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00201423
更新日期:1995-08-01 00:00:00
abstract::In this study, human arm movement was reconstructed from electromyography (EMG) signals using a forward dynamics model acquired by an artificial neural network within a modular architecture. Dynamic joint torques at the elbow and shoulder were estimated for movements in the horizontal plane from the surface EMG signal...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00199465
更新日期:1995-09-01 00:00:00
abstract::The previous companion paper describes the initial (seed) schema architecture that gives rise to the observed prey-catching behavior. In this second paper in the series we describe the fundamental adaptive processes required during learning after lesioning. Following bilateral transections of the hypoglossal nerve, an...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-005-0014-z
更新日期:2005-12-01 00:00:00
abstract::We consider the description of a nonlinear stochastic transduction in terms of its input/output distribution. We construct a sequence of approximating maximum-entropy estimates from a finite set of input/output observations. This procedure extends the Wiener theory to the analysis of nonlinear stochastic transducers a...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00318425
更新日期:1986-01-01 00:00:00
abstract::Based on the kinematics of goal-directed aiming movements in a reciprocal Fitts' task, a minimal limit cycle model is proposed that is capable of producing the behavior observed at levels of task difficulty ranging from 3 to 7. From graphical and statistical analyses of the phase planes, Hooke's planes and velocity pr...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050521
更新日期:1999-04-01 00:00:00
abstract::The contrast threshold elevation effect has been measured for one dimensional (grating) and for two dimensional (spot) stimulus patterns. It has been shown previously (Burton and Ruddock, 1978) that such stimuli elicit, respectively, non-length-selective and length-selective adaptation effects. It is established that,...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00337369
更新日期:1978-11-10 00:00:00
abstract::The generation of informational sequences and their reorganization or reshaping is one of the most intriguing subjects for both neuroscience and the theory of autonomous intelligent systems. In spite of the diversity of sequential activities of sensory, motor, and cognitive neural systems, they have many similarities ...
journal_title:Biological cybernetics
pub_type: 杂志文章,评审
doi:10.1007/s00422-006-0121-5
更新日期:2006-12-01 00:00:00
abstract::Using the theory of random point processes, a method is presented whereby functional relationships between neurons can be detected and modeled. The method is based on a point process characterization involving stochastic intensities and an additive rate function model. Estimates are based on the maximum likelihood (ML...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00332915
更新日期:1988-01-01 00:00:00