Image analysis – Histogram processing – For setting a threshold
Patent
1987-11-27
1990-10-23
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
354102, 356 12, G06K 900
Patent
active
049658409
ABSTRACT:
The present invention concerns a method of determining the distance between a surface patch of a 3-D spatial scene and a camera system. The distance of the surface patch is determined on the basis of at least a pair of images, each image formed using a camera system with either a finite or infinitesimal change in the value of at least one camera parameter. A first and second image of the 3-D scene are formed using the camera system which is characterized by a first and second set of camera parameters, and a point spread function, respectively, where the first and second set of camera parameters have at least one dissimilar camera parameter value. A first and second subimage is selected from the first and second images so formed, where the subimages correspond to the surface patch of the 3-D scene, the distance from which to the camera system, is to be determined. On the basis of the first and second subimages, a first constraint is derived between the spread parameters of the point spread function which corresponds to the first and second subimages. On the basis of the values of the camera parameters, a second constraint is derived between the spread parameters of the point spread function which corresponds to the first and second subimages. Using the first and second constrainsts, the spread parameters are then determined. On the basis of at least one of the spread parameters and the first and second sets of camera parameters, the distance between the camera system and the surface patch in the 3-D scene is determined.
REFERENCES:
patent: 4141032 (1979-02-01), Haeusler
patent: 4404594 (1983-09-01), Hannan
patent: 4410804 (1983-10-01), Stauffer
patent: 4573191 (1986-02-01), Kikode et al.
patent: 4584704 (1986-04-01), Ferren
patent: 4601053 (1986-07-01), Grumet
patent: 4634278 (1987-01-01), Ross et al.
patent: 4636624 (1987-01-01), Ishida et al.
patent: 4640620 (1987-02-01), Schmidt
patent: 4661986 (1987-04-01), Adelson
patent: 4723139 (1988-02-01), Ogasawara
patent: 4728980 (1988-03-01), Nakamura et al.
patent: 4792694 (1988-12-01), Shioya et al.
"A New Sense for Depth of Field", by A. P. Pentland, Jul. 1987 IEEE pp. 523-531.
"A New Sense for Depth of Field", A. P. Pentland, Aug. 1987, vol. PAMI-9, No. 4.
"Depth From Focus", by P. Grossman, Jan. 1987, vol. 5, pp. 63-69.
"Measuring Curved Surfaces for Robot Vision", by Ernest L. Hall, et al., Dec. 1982 IEEE pp. 42-44; 52-53.
"Multiframe Image Point Matching and 3-D Surface Reconstruction", by R. Y. Tsai, Mar., 1983, IEEE, vol. PAMI-5, No. 2.
"A Perspective on Range Finding Techniques For Computer Vision" by R. A. Jarvis Mar., 1983 IEEE vol. PAMI-5, No. 2.
Couso Jose L.
Moore David K.
State University of New York
LandOfFree
Method and apparatus for determining the distances between surfa 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 determining the distances between surfa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for determining the distances between surfa will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-772516