Data processing: vehicles – navigation – and relative location – Relative location – Collision avoidance
Patent
1998-03-26
2000-09-19
Nguyen, Tan
Data processing: vehicles, navigation, and relative location
Relative location
Collision avoidance
701300, 382171, G01C 314
Patent
active
061225975
ABSTRACT:
A vehicle monitoring apparatus for obtaining a distance image including an image data and three-dimensional distance information and for monitoring surrounding conditions on the basis of the distance image, comprises: means for dividing the distance image into a plurality of blocks composed of picture elements, means for collecting the blocks having a similar distance data and for grouping the blocks into an independent group, means for calculating an area size of the independent group, means for extracting the image data as an object data if the area size of the group is larger than a predetermined value and for discarding the image data as a false data if the area size is smaller than the predetermined value, means for preparing a histogram having a lateral axis representing a deviation amount and a longitudinal axis representing a frequency corresponding to a number of the image data, and means for detecting an object and a distance to the object by deleting the frequency having a smaller number of the image data than a threshold value along the lateral axis on the histogram. Thereby, false data can be removed from the image data and a mismatching can be prevented.
REFERENCES:
patent: 5303019 (1994-04-01), Irie
patent: 5410346 (1995-04-01), Saneyoshi
patent: 5515448 (1996-05-01), Nishitani
patent: 5592567 (1997-01-01), Kilger
patent: 5825915 (1998-10-01), Michimoto et al.
Hanawa Keiji
Saneyoshi Keiji
Fuji Jukogyo Kabushiki Kaisha
Nguyen Tan
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