Boots – shoes – and leggings
Patent
1987-04-21
1989-10-10
Riggiero, Joseph
Boots, shoes, and leggings
250224, 356375, 364559, G06F 1520
Patent
active
048736511
ABSTRACT:
A method and apparatus for reconstructing the surface, i.e the third dimension, of a three-dimensional object from two-dimemsional information includes projecting radiant energy, such as light, from a substantially parallel ray source at said object at a number of different angles relative to a reference surface with respect to which the object is placed. The lengths and locations of shadows cast by the object are measured as a function of the angle of the light rays. The location of the surface of the object relative to the reference surface is determined from the shadow lengths and locations from the angles at which the respective shadow lengths are created. Preferably, the shadow lengths and locations are measured by an electronic camera that generates electrical signals indicative of the shadow image. These signals are preferably received by a computer that determines the location of the surface of the object relative to the reference surface. Preferably, the computer also controls the position of the energy source. The method is relatively insensitive to variations in measurement and signal processing conditions. The position information produced in applying the method may be used in many applications, for example, for positioning a robot gripper to retrieve a part from a bin.
REFERENCES:
patent: 4041321 (1977-08-01), Linard
patent: 4488173 (1984-12-01), DiMatteo et al.
patent: 4630225 (1986-12-01), Hisano
patent: 4672557 (1987-06-01), Tamura et al.
patent: 4680802 (1987-07-01), Nishida et al.
Sinden, "Shape Information from Rotated Scans", PAMI-7, IEEE Trans. on Pattern Analysis and Machine Intelligence, (1985), pp. 726-730.
Ikeuchi "Numerical Shape from Shading and Occluding Boundaries", 17 vol. Artificial Intelligence (1981) pp. 141-84.
Kender, et al., "Shape from Darness", American Assn. for Artificial Intelligence Conference (Aug. 1986) pp. 664-669.
Pentland, "Shading Into Texture", From Pixels to Predicates, Pentland Ed (1986) pp. 253-267.
Horn, "Shape from Shading", Doctoral Thesis, MIT, Jun 1970, pp. 1-25.
Case Western Reserve University
Riggiero Joseph
LandOfFree
Method and apparatus for reconstructing three-dimensional surfac does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reconstructing three-dimensional surfac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reconstructing three-dimensional surfac will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1961611