Road position detection

Details Road position detection Road position detection

2004-07-22

2009-06-02

Wu, Jingge (Department: 2624)

Image analysis

Applications

Range or distance measuring

C382S104000

Reexamination Certificate

active

07542589

ABSTRACT:
A dynamic contour extracting means detects, using a dynamic contour extraction method generally known as SNAKE, a contour of a recognition object included on an image by the following steps: a curve with control points is disposed in an image; an internal energy Eint indicating smoothness of the curve, an image energy Eimage, and an external energy Eext are summed up; and the curve is modified so that the summed total energy becomes the minimum. Here, a template is stored for including disposition information of primary control points that are bound to be moved only in a vertical or horizontal direction based on a road shape. The dynamic contour extracting means moves the primary control points based on the template. The primary control points can be rapidly moved owing to their limited movement direction.

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Notice of Reason for Rejection from Japanese Patent Office issued on Dec. 5, 2006 for the corresponding Japanese patent application No. 2003-286036 (a copy and English translation thereof).
Yasushi Yagi, et al., “Active Contour Road Model for Road Tracking and 3D Road Shape Reconstruction,” Transaction of the Institute of Electronics, Information and Communication Engineers, pp. 1597-1607, vol. J84-D-11 No. 8, Aug. 2001.

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