Apparatus and method for detecting vehicle

• US 20060140449A1
• Filed: 12/27/2005
• Published: 06/29/2006
• Est. Priority Date: 12/27/2004
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Monji, Tatsuhiko, Otsuka, Yuji, Muramatsu, Shoji, Takenaga, Hiroshi
• Application Number:
  US11/317,010
• Publication Number:
  US 20060140449A1
• Time in Patent Office: Days
• US Class Current: 382/104
• CPC Class Codes: G01S 13/867 Combination of radar systems with cameras
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 17/50 Systems of measurement based on relative movement of target
• CPC Class Codes: G01S 17/86 Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders
• CPC Class Codes: G01S 2013/9323 Alternative operation using light waves
• CPC Class Codes: G01S 2013/93271 in the front of the vehicles
• CPC Class Codes: G01S 7/41 using analysis of echo signal for target characterisation; Target signature; Target cross-section
• CPC Class Codes: G01S 7/417 involving the use of neural networks
• CPC Class Codes: G06F 16/36 Creation of semantic tools, e.g. ontology or thesauri
• CPC Class Codes: G06F 18/256 of results relating to different input data, e.g. multimodal recognition
• CPC Class Codes: G06V 10/255 Detecting or recognising potential candidate objects based on visual cues, e.g. shapes
• CPC Class Codes: G06V 10/811 the classifiers operating on different input data, e.g. multi-modal recognition
• CPC Class Codes: G06V 2201/08 Detecting or categorising vehicles

Abstract

A vehicle detection apparatus has a classifier that receives features of an image and judges whether the image is a vehicle. The features extracted from the picked-up image are supplied to the classifier so that judgment can be made of whether the image is the vehicle. If the judgment result and the result from a radar are not matched, the picked-up image pattern is registered in teaching data. The classifier is updated by learning from the teaching data.

Claims

1. A vehicle detection apparatus comprising:

a classifier that receives features of an image and judges whether said image is a vehicle;

image pick-up means for picking up said image;

vehicle judgment means that supplies to said classifier said features extracted from said image taken by said image pick-up means so that judgment can be made of whether said image contains a vehicle;

other image detection means that is provided separately from said vehicle judgment means and that detects said vehicle;

coincidence judgment means for judging whether the judgment result of said vehicle judgment means coincides with the detection result of said other image detection means; and

means that updates said classifier so that, when said coincidence judgment means judges to be mismatched, the judgment result of said vehicle judgment means can be matched to the result from said other image detection means after supplying to said classifier said features extracted from the image taken by said image pick-up means.

2. A vehicle detection apparatus comprising:

a classifier that receives features of an image and judges whether said image is a vehicle;

a radar for detecting said vehicle;

image pick-up means for picking up said image;

vehicle judgment means that supplies to said classifier said features extracted from said image picked up by said image pick-up means so that judgment can be made of whether said image contains said vehicle;

coincident judgment means for judging whether the judgment result of said vehicle judgment means coincides with the detection result of said radar; and

means that updates said classifier so that, when said coincidence judgment means judges to be mismatched, the judgment result of said vehicle judgment means can be matched to the result from said radar after supplying to said classifier said features extracted from the image taken by said image pick-up means.

3. A vehicle detection apparatus comprising:

a classifier that receives features of an image and judges whether said image is a vehicle;

image pick-up means for picking up said image;

judgment means that supplies to said classifier said features extracted from said image picked up by said image pick-up means so that judgment can be made of whether said image contains said vehicle;

correctness/error judgment means that judges whether the judgment result from said judgment means is correct;

means that updates said classifier so that, when said correctness/error judgment means judges said judgment result to be error, the judgment result can be judged to be correct after supplying to said classifier said features extracted from said image picked up by said image pick-up means.

4. A system having a vehicle detection apparatus and a center apparatus, said vehicle detection apparatus comprising:

a classifier that receives features of an image and judges whether said image is a vehicle;

image pick-up means for picking up said image;

vehicle judgment means that supplies to said classifier said features extracted from said image picked up by said image pick-up means so that judgment can be made of whether said image contains said vehicle;

other image detection means that is provided separately from said vehicle judgment means and that detects said vehicle;

coincidence judgment means for judging whether the judgment result of said vehicle judgment means coincides with the detection result of said other image detection means; and

means that delivers up said image picked up by said image pick-up means to said center apparatus as teaching data when said coincidence judgment means judges said judgment result to be mismatched, said center apparatus comprising;

means that updates said classifier by using said teaching data received from said vehicle detection apparatus, said vehicle detection apparatus further comprising;

means for receiving said classifier updated by said center apparatus; and

means for storing said received classifier in a memory.

5. A vehicle detection apparatus comprising:

a classifier that receives features of an image and judges whether said image is a vehicle;

image pick-up means for picking up said image;

vehicle judgment means that supplies to said classifier said features extracted from said image picked up by said image pick-up means so that judgment can be made of whether said image contains said vehicle;

other image detection means that is provided separately from said vehicle judgment means and that detects said vehicle;

coincidence judgment means for judging whether the judgment result of said vehicle judgment means coincides with the detection result of said other image detection means; and

means that registers said image picked up by said image pick-up means as teaching data from which said classifier is forced to learn when said coincidence judgment means judges said judgment result to be mismatched.

6. A method of detecting a vehicle in a vehicle detection apparatus, said vehicle detection apparatus having a classifier that receives features and judges whether said features indicate a vehicle, said method comprising the steps of:

picking up an image;

supplying to said classifier said features extracted from said image picked up by said image picking-up step so that judgment can be made of whether said image contains a vehicle;

detecting said vehicle as other step than said vehicle judgment step;

judging whether the judgment result of said vehicle judgment step coincides with the detection result of said other detection step; and

updating said classifier so that, when said coincidence judgment step judges to be mismatched, the judgment result of said vehicle judgment step can be matched to the result obtained by said other detection step after supplying to said classifier said features extracted from said image picked up by said image picking-up step.