Object recognition device and object recognition method

Patent metadata

Field	Value
Publication number	US-11555913-B2
Application number	US-201716650686-A
Country	US
Kind code	B2
Filing date	Nov 13, 2017
Priority date	Nov 13, 2017
Publication date	Jan 17, 2023
Grant date	Jan 17, 2023

Abstract

In this object recognition device, an association between a first object detection result and a second object detection result is taken in a region excluding an occlusion area. When the first object detection result and the second object detection result are determined to be detection results for an identical object, a recognition result of the surrounding object is calculated from the first object detection result and the second object detection result. Thus, occurrences of erroneous recognition of an object can be decreased as compared to a conventional object recognition device of a vehicle.

First claim

The invention claimed is:

1. An object recognition device comprising:
first object detector mounted on a vehicle and configured to detect a surrounding object around the vehicle, the first object detector causing an occlusion area in association with the detected surrounding object;
an occlusion area detection processor configured to determine the caused occlusion area;
object detection generator configured to generate a second object detection result of which an association is taken with a first object detection result of the first object detector;
an association processor configured to take an association between the first object detection result and the second object detection result in an area excluding the occlusion area determined by the occlusion area detection processor; and
an update processor configured to, when the association processor determines that the first object detection result and the second object detection result are detection results for an identical object, calculate a recognition result for the surrounding object on the basis of the first object detection result and the second object detection result, and update the recognition result, wherein
the vehicle is controlled on the basis of the recognition result of the update processor.

2. The object recognition device according to claim 1 , wherein
the association processor selects detection results having a high association between the first object detection result and the second object detection result.

3. The object recognition device according to claim 2 , wherein
information for which the association is taken is information about a distance from the vehicle to the surrounding object that is detected.

4. The object recognition device according to claim 1 , wherein
the object detection generator is a second object detector that does not cause an occlusion area.

5. The object recognition device according to claim 1 , wherein
the object detection generator is a prediction processor configured to output an object detection result predicted on the basis of the recognition result calculated by the update processor.

6. The object recognition device according to claim 1 , wherein
the occlusion area detection processor determines the occlusion area on the basis of a width of the surrounding object and a distance from the vehicle to the surrounding object, detected by the first object detector.

7. An object recognition method for recognizing a surrounding object and controlling a vehicle on the basis of recognized information, the method comprising:
determining an occlusion area caused by a first detector, in association with a surrounding object, in the detection of said surrounding object;
determining a first detectable area obtained by excluding the occlusion area from a detection area for the surrounding object;
determining a second detectable area of a second detector which does not cause an occlusion area;
for the surrounding objects present in both of the first detectable area and the second detectable area, detecting object information including distances to the surrounding objects, using the first detector and the second detector; and
recognizing a combination of detection results between which a difference in the detected distances is smallest, as object information about an identical object.

8. The object recognition method according to claim 7 , wherein
in determination of the occlusion area, a margin for canceling out detection error is set, in accordance with object detector accuracy.

9. An object recognition method for recognizing a surrounding object and controlling a vehicle on the basis of recognized information, the method comprising:
determining an occlusion area caused by a first detector, in association with a surrounding object, in the detection of the surrounding object;
determining a first detectable area obtained by excluding the occlusion area from a detection area for the surrounding object;
taking an association between a detection result of the surrounding object present in the first detectable area and a prediction result obtained by predicting a present position from a result of previous detection of the surrounding object, regarding a distance to the surrounding object; and
recognizing a combination of a detection result and a prediction result between which a difference in the distances is smallest, as object information about an identical object.

10. The object recognition method according to claim 9 , wherein
in determination of the occlusion area, a margin for canceling out detection error is set, in accordance with object detector accuracy.

Assignees

• Mitsubishi Electric Corp

Inventors

• Akiyama Tomohiro

Classifications

• G01B11/02

  for measuring length, width or thickness (G01B11/08 takes precedence) · CPC title

• G01S13/931 Primary

  of land vehicles · CPC title

• G01S13/87 Primary

  Combinations of radar systems, e.g. primary radar and secondary radar · CPC title

• G01S2013/93271

  in the front of the vehicles · CPC title

• G01S13/867

  Combination of radar systems with cameras · CPC title