| EPSRC Reference: |
GR/H53006/01 |
| Title: |
ADAPTIVE STEREO MATCHING AND DISPARITY INTERPRETATION UNDER VARIABLE VIEWING GEOMETRY |
| Principal Investigator: |
Frisby, Professor J |
| Other Investigators: |
|
| Researcher Co-Investigators: |
|
| Project Partners: |
|
| Department: |
Psychology |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 November 1992 |
Ends: |
31 October 1995 |
Value (£): |
123,740
|
| EPSRC Research Topic Classifications: |
| Vision & Senses - ICT appl. |
|
|
| EPSRC Industrial Sector Classifications: |
|
| Related Grants: |
|
| Panel History: |
|
|
Summary on Grant Application Form |
|
(i) Simulation and analysis of the mathematical structure of the disparity vector field under variable viewing geometries. (ii) Development of an adaptive self-tuning neural net architecture to support predictive stereo matching & ground plane obstacle avoidance under variable camera geometry.(iii)Psychophysical evaluation of human stereo mechanisms using manipulations of the disparity vector field under controlled eye movements.Progress:Objective (i)The geometry of the disparity vector field under eye-movements has been modelled leading to the regional disparity correction theory of Garding, Porrill, Mayhew & Frisby (1995 Vision Research 35 (5) 703-722). The effects of measurement noise on disparity correction mechanisms has been investigated quantitatively for an ideal observer model. A neural implementation of the subspace method for analysing optic flow proposed by Lappe et al. has been extended to deal with correlated errors of measurement obtaining biologically plausible receptive field geometries. Implications for the neural analysis of vertical disparities are under investigation. Objective (ii)A PILUT (Parameterised Interpolative Look-up Table) architecture has been developed and is being applied to real-time dynamic camera calibration. A demonstration has been completed which uses the PILUT calibration information to control real-time image warping to give stable epipolars under dynamic viewing geometry.Objective (iii)Computer graphics software has been written and tested for creating sequences of stereograms in which the horizontal and vertical components of disparity can be separately manipulated for a wide range of 3D surface shape parameter settings. Eight psychophysical experiments have been completed using this software, and have been reported to international conferences, aimed at testing whether human vision implements the regional disparity correction theory. Five papers describing the above work are under preparation for journal publication.
|
|
Key Findings |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Potential use in non-academic contexts |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Impacts |
|
| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
|
| Date Materialised |
|
|
|
|
Sectors submitted by the Researcher |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
| Project URL: |
|
| Further Information: |
|
| Organisation Website: |
http://www.shef.ac.uk |