Controller system for a vehicle occupant protection device

• US 7,283,901 B2
• Filed: 01/13/2005
• Issued: 10/16/2007
• Est. Priority Date: 01/13/2005
• Status: Expired due to Fees

• Current Assignee: TRW Automotive USLLC (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: TRW Automotive USLLC (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Luo, Yun, Wallace, Jon K.
• Primary Examiner(s): BEAULIEU, YONEL
• Application Number:
  US11/035,146
• Publication Number:
  US 20060155442A1
• Time in Patent Office: 1,006 Days
• Field of Search: 701 45- 47, 701/36, 180/271, 280/728.1, 280734-735, 307/9.1, 340/425.5, 340/438
• US Class Current: 701/45
• CPC Class Codes: B60R 21/01538 for image processing, e.g. cameras or sensor arrays
• CPC Class Codes: G06T 2207/10012 Stereo images
• CPC Class Codes: G06T 2207/30268 Vehicle interior
• CPC Class Codes: G06T 7/73 using feature-based methods
• CPC Class Codes: G06V 40/103 Static body considered as a whole, e.g. static pedestrian or occupant recognition

Abstract

Systems and methods are provided for identifying a position of a head of a vehicle occupant from a plurality of images of a vehicle interior. Image data is translated from the plurality of images to produce a virtual side view image of the vehicle interior (162). A largest grouping of pixels in the side view image having values within a desired range is identified (164). The grouping includes a plurality of pixel columns. A contour including uppermost pixels of each pixel column is produced and peaks are located within the contour (166). The contour peaks are analyzed according to a heuristic voting algorithm to identify a peak location associated with the head of the vehicle occupant (172).

Claims

1. A system for controlling an actuatable occupant protection system comprising:

an image generator that generates at least two images of a vehicle occupant;

a virtual image generator that produces a virtual side view image of the vehicle occupant from the generated images;

a blob finder that selects a largest grouping of pixels in the virtual side view image;

a peak identifier that locates a plurality of peaks along the uppermost contour of the selected grouping of pixels; and

an arbitrator that selects one of the plurality of peaks according to determined characteristics of the peaks.

2. The system of claim 1, further comprising a contour generator that locates the uppermost contour of the largest grouping of pixels.

3. The system of claim 2, further comprising a low pass filter that smoothes the located uppermost contour, the low pass filter having a width approximating the expected width of an adult human head within the image.

4. The system of claim 1, further comprising a coarse edge search component that locates a frontward edge associated with the selected peak.

5. The system of claim 4, further comprising a fine edge search component that iteratively refines the location of the front edge until a desired degree of accuracy is achieved.

6. The system of claim 1, further comprising a disparity processing component that generates a stereo disparity map from the at least two images, the virtual image generator using the stereo disparity map to generate the virtual side view image.

7. The system of claim 1, further comprising an occupant protection system control that controls the actuation of the occupant protection system according to a location associated with the selected peak.

8. A computer program product, implemented in a computer readable medium and operative in a data processing system, controlling an actuatable occupant protection system, comprising:

a virtual image generator that translates image data from a plurality of images to produce a virtual side view image of the vehicle interior;

a blob finder that identifies a largest grouping of pixels in the side view image;

a contour generator that identifies an uppermost contour of the largest grouping of pixels;

a peak identifier that locates peaks within the contour; and

a voting arbitrator that analyzes the contour peaks according to a heuristic voting algorithm to identify a peak location associated with the head of the vehicle occupant.

9. The computer program product of claim 8, further comprising a disparity processing component that generates a stereo disparity map from the at least two images, the virtual image generator using the stereo disparity map to generate the virtual side view image.

10. The computer program product of claim 8, further comprising a system control that controls the actuation of the occupant protection system according to a location associated with the identified peak location.

11. The computer program product of claim 8, further comprising a coarse edge search component that locates a frontward edge associated with the identified peak location.

12. The computer program product of claim 11, further comprising a fine edge search component that interatively refines the location of the front edge until a desired degree of accuracy is achieved.