IP Library Granted Patent US 7,046,822
Granted Patent B1
US 7,046,822 · App. 10/009,596 · Granted May 16, 2006

Method of detecting objects within a wide range of a road vehicle

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Quick Facts
Patent No.
US 7,046,822
App. No.
10/009,596
Granted
May 16, 2006
Kind
B1
Abstract

The invention relates to a method of detecting objects within a wide range of a road vehicle. According to said method, the distance between a moving or stationary vehicle and one or more objects is calculated by distance-based image segmentation using stereoscopic image processing techniques and the properties of the detected objects are determined by object recognition in the segmented image areas. Image areas of three-dimensional and/or flat objects are detected and said three-dimensional and/or flat objects are detected by clustering 3D pixels according to defined criteria. Three-dimensional objects are determined by features with similar distance values and flat objects by features with similar height values.

Claims (24)

1. A method of detecting objects in a vicinity of a road vehicle up to a considerable distance, in which a distance from a moving or stationary vehicle to one or more objects is calculated by distance-based image segmentation using stereo image processing, and characteristics of the detected objects are determined by object recognition in the segmented image regions, the method comprising the acts of:

determining image regions of elevated objects and/or flat objects;

detecting elevated objects and/or flat objects by combining 3D points in accordance with predetermined criteria, the elevated objects being determined through features with similar distance values and the flat objects being determined through features with similar height values;

tracking over time relevant detected objects and determining the distance and lateral position of the relevant detected objects relative to the road vehicle in order to assess dynamic behavior of the relevant detected objects;

determining object hypothesis for performing object recognition, said object hypothesis being verified by comparison with object models;

scanning segmented image regions in accordance with predetermined, statistically verified 2D features of particular relevant detected objects to be

comparing the particular relevant detected objects using a neural network for classifying a specific object type;

scanning one of recorded pairs of stereo images for significant features of objects to be registered; and

determining a spacing of at least one object's significant features by comparing respective features in a stereo image from a pair of stereo images with the same, corresponding features, in the other stereo image from the pair of stereo images recorded at the same time;

wherein disparities that occur are evaluated via cross correlation techniques.

2. The method according to claim 1 , wherein elevated relevant detected objects are road vehicles and flat relevant detected objects are road markings and boundaries.

3. The method according to claim 2 , further comprising the act of determining a relative position and a relative speed of the relevant detected objects relative to one another and to the road vehicle by evaluating a distance measurement, in order to determine an accurate road-lane object association.

4. The method according to claim 3 , wherein the relative position and the relative speed of the relevant detected objects are determined in order to assess a relevance of the detected objects to a particular situation.

5. The method according to claim 1 , further comprising the act of determining a relative position and a relative speed of the relevant detected objects relative to one another and to the road vehicle by evaluating a distance measurement, in order to determine an accurate road-lane object association.

6. The method according to claim 5 , wherein the relative position and the relative speed of the relevant detected objects are determined in order to assess a relevance of the detected objects to a particular situation.

7. The method according to claim 1 , wherein by determining the spacing of the significant features in a pixel range, 3D points in the road vehicle environment are determined relative to a coordinate system of a measuring device performing the detecting method.

8. The method according to claim 1 , wherein said objects are detected by at least one of radar, infrared sensing, and stereoscopic or mono sensing.

9. A method of detecting and recognizing an object in a vicinity of a road vehicle, the method comprising the acts of:

performing distance-based image segmentation to calculate a distance from the road vehicle to an object to be detected;

scanning the segmented image regions in accordance with predetermined, statistically verified 2D features of the object to be detected;

comparing the detected object using a neural network for classifying it as a specific object type,

scanning one of recorded pairs of stereo images for significant features of objects to be registered; and

determining a spacing of at least one object's significant features by comparing respective features in a stereo image from a pair of stereo images with the same, corresponding features, in the other stereo image from the pair of stereo images recorded at the same time;

wherein disparities that occur are evaluated via cross correlation techniques.

Assignments (2)
CORRECTIVE ASSIGNMENT TO CORRECT THE APPLICATION NO. 10/567,810 PREVIOUSLY RECORDED ON REEL 020976 FRAME 0889. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF NAME. Recorded Jul 1, 2020
From: DAIMLERCHRYSLER AG
To: DAIMLER AG
Reel/Frame 053583/0493 →
MERGER Recorded Dec 22, 2015
From: RAMSLE TECHNOLOGY GROUP GMBH, LLC
To: OL SECURITY LIMITED LIABILITY COMPANY
Reel/Frame 037358/0685 →