From filters to features: scale-space analysis of edge and blur coding in human vision.

From filters to features: scale-space analysis of edge and blur coding in human vision. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

From filters to features: scale-space analysis of edge and blur coding in human vision. Abstract Text:

Mark A Georgeson,Keith A May,Tom C A Freeman,Gillian S Hesse,Mark A Georgeson,Keith A May,Tom C A Freeman,Gillian S Hesse,

To make vision possible, the visual nervous system must represent the most informative features in the light pattern captured by the eye. Here we use Gaussian scale-space theory to derive a multiscale model for edge analysis and we test it in perceptual experiments. At all scales there are two stages of spatial filtering. An odd-symmetric, Gaussian first derivative filter provides the input to a Gaussian second derivative filter. Crucially, the output at each stage is half-wave rectified before feeding forward to the next. This creates nonlinear channels selectively responsive to one edge polarity while suppressing spurious or "phantom" edges. The two stages have properties analogous to simple and complex cells in the visual cortex. Edges are found as peaks in a scale-space response map that is the output of the second stage. The position and scale of the peak response identify the location and blur of the edge. The model predicts remarkably accurately our results on human perception of edge location and blur for a wide range of luminance profiles, including the surprising finding that blurred edges look sharper when their length is made shorter. The model enhances our understanding of early vision by integrating computational, physiological, and psychophysical approaches.

From filters to features: scale-space analysis of edge and blur coding in human vision. Publishing Authors By Initials

MA Georgeson,KA May,TC Freeman,GS Hesse,MA Georgeson,KA May,TC Freeman,GS Hesse,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

From filters to features: scale-space analysis of edge and blur coding in human vision. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of vision

VOLUME: 7

Page Numbers: 7.1-21

Journal Abbreviation:

ISSN: 1534-7362

DAY: 19

MONTH: 10

YEAR: 2007

From filters to features: scale-space analysis of edge and blur coding in human vision. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 101147197

From filters to features: scale-space analysis of edge and blur coding in human vision. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: From filters to features: scale-space analysis of edge and blur coding in human vision. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for From filters to features: scale-space analysis of edge and blur coding in human vision.

AFFILIATION: School of Life & Health Sciences, Aston University, Birmingham, UK. m.a.georgeson@aston.ac.uk

Country: United States

AGENCY: United Kingdom Wellcome T

GRANT: 056093/B/98

ACRONYM:

MEDLINETA: J Vis

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

From filters to features: scale-space analysis of edge and blur coding in human vision Related Publications

• (+)-Norchelidonine from Chelidonium majus.
• Action of insulin on the respiration of rat sciatic nerve.
• Atomic-scale study of electric dipoles near charged and uncharged domain walls in ferroelectric films.
• Beta 2-microglobulin serum levels in infectious mononucleosis in childhood.
• Cancer-related information sought by the general public: evidence from the National Cancer Institute's Cancer Information Service, 2002-2003.
• Conversion of nitroheptane to dihydrojasmone.
• Developmental and interactional aspects of creative expression in the course of group psychotherapy.
• Experimental observation of a torus doubling of a metal/ferroelectric film/semiconductor capacitor.
• Frequency of asymptomatic peripheral arterial disease in patients entering the department of general and internal medicine of a general-care hospital.
• From filters to features: scale-space analysis of edge and blur coding in human vision.
• Improvement in cyclosporine handling by anti-lymphocyte globulin in the early post-operative period.
• On estimating the signal subspace dimension of high-density multichannel magnetoencephalogram measurements.
• On the use of Spectrally Constrained ICA applied to single-channel Ictal EEG recordings within a Dynamical Embedding Framework.
• Personality-guided treatment for alcohol dependence: a quasi-randomized experiment.
• Positive two-stage carcinogenesis in female Sprague-Dawley rats using 7,12-dimethylbenz(a)anthracene (dmba) as initiator and 12-o-tetradecanoylphorbol-13-acetate (tps) as promotor. Results of a pilot study.
• Regulation of aspartate-derived amino acid homeostasis in potato plants (Solanum tuberosum L.) by expression of E. coli homoserine kinase.
• The effect of Rauscher and Moloney leukaemia virus on amyloid development in casein-treated CBA mice.
• Three New Tazettine-Type Alkaloids from Galanthus gracilis and Galanthus plicatus Subsp. byzantinus.
• Use of the internet to communicate with health care providers in the United States: estimates from the 2003 and 2005 Health Information National Trends Surveys (HINTS).
• [Art therapy as seen by patients. Proposal for a new approach with the aid of a questionnaire]
• [Choice and decision in creative processes and in therapy]
• [Contributions to the Structure of Hypercratine, another Alkaloid of Ruspolia hypercrateriformis.]
• [Emergencies in general medicine (60). Suicide]
• [Metastasis in lung and pleura]
• [Not Available.]
• [Not Available.]
• [Psychosomatic medicine in daily general practice. Requirements and expectations]
• [Quality of medical information on admission to a nursing home]
• [Splenectomy in Werlhof's disease during pregnancy]
• [The Supernaturan bath and its variations]