David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
Learn more about PhilPapers
We show that cast shadows can have a significant influence on the speed of visual search. In particular, we find that search based on the shape of a region is affected when the region is darker than the background and corresponds to a shadow formed by lighting from above. Results support the proposal that an early-level system rapidly identifies regions as shadows and then discounts them, making their shapes more difficult to access. Several constraints used by this system are mapped out, including constraints on the luminance and texture of the shadow region, and on the nature of the item casting the shadow. Among other things, this system is found to distinguish between line elements (items containing only edges) and surface elements (items containing visible surfaces), with only the latter deemed capable of casting a shadow.
|Keywords||No keywords specified (fix it)|
|Categories||categorize this paper)|
Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
|Through your library||
References found in this work BETA
No references found.
Citations of this work BETA
No citations found.
Similar books and articles
Tom Stoneham (2011). Catching Berkeley's Shadow. Southern Journal of Philosophy 49 (2):116-136.
István Aranyosi (2010). The Nature of Shadows, From Yale to Bilkent. Philosophy 85 (2):219-223.
Roy A. Sorensen (2008). Seeing Dark Things: The Philosophy of Shadows. Oxford University Press.
Stevan Harnad (2005). To Cognize is to Categorize: Cognition is Categorization. In C. Lefebvre & H. Cohen (eds.), Handbook of Categorization. Elsevier.
István Aranyosi (2010). The Nature of Shadows, From Yale to Bilkent. Philosophy 85 (332):219 - 223.
Added to index2009-01-28
Total downloads15 ( #112,797 of 1,100,083 )
Recent downloads (6 months)2 ( #190,060 of 1,100,083 )
How can I increase my downloads?