MASSON , Guillaume S.

Motion processing in primates is an intensely studied problem in visual neurosciences and after more than two decades of research, representation of motion in terms of motion energies computed by V1-MT feedforward interactions remains a strong hypothesis. Thus, decoding the motion energies is of natural interest for developing biologically...

The dynamics of motion integration show striking similarities when observed at neuronal, psychophysical, and oculomotor levels. Based on the inter-relation and complementary insights given by those dynamics, our goal was to test how basic mechanisms of dynamical cortical processing can be incorporated in a dynamical model to solve several...

We propose a dynamical model of 2D motion integration where diffusion of motion information is modulated by luminance information. This model incorporates feedforward, feedback and inhibitive lateral connections and is inspired by the neural architecture and dynamics of motion processing cortical areas in the primate (V1, V2, and MT). The first...

The dynamics of motion integration show striking similarities when observed at neuronal, psychophysical, and oculomotor levels. Based on the inter-relation and complementary insights given by those dynamics, our goal was to test how basic mechanisms of dynamical cortical processing can be incorporated in a dynamical model to solve several...

no abstract

It is widely accepted that V1 surround suppression mechanism plays a role in the end-stopping property of neurons in the primary visual cortex. But, what is not known is the extent of this mechanism to explain the motion direction perceived in MT neurons, and neither, the spatio-temporal content of the V1 suppressive surrounds that maximizes...

We propose a bio-inspired approach to motion estimation based on recent neuroscience findings concerning the motion pathway. Our goal is to identify the key biological features in order to reach a good compromise between bio-inspiration and computational efficiency. Here we choose the neural field formalism which provides a sound mathematical...

Offering proper evaluation methodology is essential to continue progress in modelling neural mechanisms in vision/visual information processing. Currently, evaluation of motion estimation models lacks a proper methodology for comparing their performance against the visual system. Here, we set the basis for such a new benchmark methodology which...

We used an obliquely oriented moving luminance grating within a square aperture as a stimulus. We probed how the aperture problem (determining direction of a contour within an aperture) is solved following onset. It is perceived to move in horizontally (H), diagonally (D) or vertically (V), shifting perception during extended presentation. The...

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We use a mathematical model to investigate the early temporal dynamics of motion integration with a multistable input. A drifting grating stimulus is considered with an aperture configuration that supports horizontal (H), diagonal (D) or vertical (V) perceived directions for the same input. A shift in perceptual dominance from D to either H/V...

When an obliquely moving sine wave grating is presented inside a square aperture, observers are faced with a conflict of local motion signals resulting from the "aperture problem". Motion signals along the grating contours on average have a diagonal direction (D) while those near the horizontal (H) and vertical (V) edges lie along these...

Offering proper evaluation methodology is essential to continue progress in modelling the neural mechanisms involved in vision information processing. Currently the evaluation of biologically inspired motion estimation models lacks a proper methodology for comparing their performance against behavioural and psychophysical data. Here we set the...

Evaluation of neural computational models of motion perception currently lacks a proper methodology for benchmarking. Here, we propose an evaluation methodology for motion estimation which is based on human visual performance, as measured in psychophysics and neurobiology. Offering proper evaluation methodology is essential to continue progress...