Visual System & Resolving Ambiguities
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Question: Discuss how the visual system resolves ambiguities by making different types of assumptions.
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This solution is comprised of a detailed discussion of the visual system and how ambiguities can be resolved. This is all completed in about 830 words and includes references.
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1. Discuss how the visual system resolves ambiguities by making different types of assumptions.
The visual system resolves ambiguities by making assumptions such as:
- Illumination from above and viewpoint from above e.g. relies on image information in addition to shading and relies on prior assumptions about the scene (Langer & Buehoff, 2001)
- That the viewpoint is from above rather than from below (Reichel and Todd 1990: cited in Langer & Buelhoff, 2001).
- That the surface is globally convex rather than globally concave e.g. prior assumptions about the scene (Johnston et al., 1992; Hill & Bruce, 1993: cited in Langer & Buelhoff, 2001).
Let's look closer at each of these assumptions through research findings and examples.
From one source:
As a case in point, when light strikes a surface, the shading pattern reflected from the surface depends on the incident light distribution, on the material of the surface, and on the three-dimensional (3-D) shape of the surface. Inferring exact shape from shading is impossible since there are infinitely many shapes, lighting conditions, and surface reflectances that can produce a given shading pattern (D'Zmura, 1991; Belhumeur et al., 1997: cited in Langer & Buelhoff, 2001).
1. To resolve these ambiguities between ...
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