Title:
METHOD OF DETERMINING AN ILLUMINATED SURFACE
Document Type and Number:
WIPO Patent Application WO2000045125
Kind Code:
A8
Abstract:
Method of determining a surface illuminated by incident light. First the intensity (I1(x,y)) of light reflected from the surface is recorded in a first image of the surface. After this, the intensity (I2(x,y)) of light reflected from the surface is recorded in a second image of the surface, taken at a different angle of illumination. Only the diffusely reflected light is recorded. The difference between the recorded intensities of the first and the second images is determined to obtain a representation that emphasises variations in gradient of the surface. This representation is further processed by signal-adapted integration to a topographic description, that is, a height function of the surface.
Inventors:
JOHANSSON PER-AAKE (SE)
HANSSON PETER (SE)
HANSSON PETER (SE)
Application Number:
PCT/SE2000/000024
Publication Date:
December 07, 2000
Filing Date:
January 10, 2000
Export Citation:
Assignee:
SVENSKA TRAEFORSKNINGSINST (SE)
JOHANSSON PER AAKE (SE)
HANSSON PETER (SE)
JOHANSSON PER AAKE (SE)
HANSSON PETER (SE)
International Classes:
G01B11/24; G01B11/30; B41F33/14; (IPC1-7): G01B11/24; G01B11/30
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