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Is the human visual system optimised to the spatial statistics of luminance and chrominance contrast in natural scenes
Reference
S11501
Principal Investigator / Supervisor
Professor Tom Troscianko
Co-Investigators /
Co-Supervisors
Dr Carlos Parraga
,
Dr David John Tolhurst
Institution
University of Bristol
Department
Experimental Psychology
Funding type
Research
Value (£)
175,088
Status
Completed
Type
Research Grant
Start date
01/05/1999
End date
15/07/2002
Duration
39 months
Abstract
We will test psychophysically whether human vision is optimised for encoding the spatiochromatic information in natural scenes. We will measure visual thresholds for discriminating morphed objects or blended textures in full-colour digitised photographs of natural scenes, and ask if they are compromised by making image statistics unnatural, in fovea and periphery. We will make the second-order statistics unnatural by altering the luminance and chrominance power spectra of the stimuli separately. We will then devise computational ways to describe and distort higher-order statistics of natural-scene stimuli, so that we can measure systematically whether unnatural high-order spectral distortions also affect visual discrimination adversely.
Summary
unavailable
Committee
Closed Committee - Animal Sciences (AS)
Research Topics
X – not assigned to a current Research Topic
Research Priority
X – Research Priority information not available
Research Initiative
X - not in an Initiative
Funding Scheme
X – not Funded via a specific Funding Scheme
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