Image analysis – Applications – Target tracking or detecting
Patent
1997-07-28
2000-02-01
Au, Amelia
Image analysis
Applications
Target tracking or detecting
382104, 382106, 382278, 340937, 356 314, 348116, 348140, 348170, G06K 900, G08G 1017, G01C 300, H04N 700
Patent
active
060212098
ABSTRACT:
In a distance detection method, a pair of image data representing a pattern of images is obtained by using a pair of image sensors for receiving optical images. Then, a detection target extracted from each of the image data is captured while sequentially shifting positions of divisions in respective groups of divisions from window part data corresponding to a visual field to provide combinations, each having a pair of divisions, and a correlation value is calculated between each pair of the divisions. Also, a precision at a best correlation point as an indicator of reliability of the best correlation is obtained based on a changing condition of the correlation value near a shift value where the best correlation value has been calculated. Finally, a distance to the detection target is obtained by determining that the detection target is present in the visual field seen through the window corresponding to the window part data only when the precision exceeds a predetermined level.
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Hirabayashi Takehide
Izumi Akio
Shimizu Hideo
Au Amelia
Dastouri Mehrdad
Fuji Electric & Co., Ltd.
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