Parking assistance system and method

• US 8,854,231 B2
• Filed: 01/06/2012
• Issued: 10/07/2014
• Est. Priority Date: 01/28/2011
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Thomas, Bijo, Ravindran, Biju
• Primary Examiner(s): Wang, Jack K
• Application Number:
  US13/345,214
• Publication Number:
  US 20120194355A1
• Time in Patent Office: 1,005 Days
• Field of Search: 340/932.2, 348/148, 701/532
• US Class Current: 340/932.2
• CPC Class Codes: B60R 1/00 Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
• CPC Class Codes: B60R 1/27 providing all-round vision, e.g. using omnidirectional cameras
• CPC Class Codes: B60R 2300/305 merging camera image with lines or icons
• CPC Class Codes: B60R 2300/607 from a bird's eye viewpoint
• CPC Class Codes: B60R 2300/806 for aiding parking
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources

Abstract

A vehicle parking assistance system is based on presenting a bird'"'"'s eye view. The display has an input interface such as a touch-input display or a remote input device such as a joystick. In this case, by selecting a desired position on the display (which is presenting an image of an object or location in space for which the driver is wanting to know the range), the user is able to request a distance calculation between the vehicle and that location in space. The distance information can be provided as an audible message and/or as a visual overlay message onto the bird'"'"'s eye view.

Claims

1. A vehicle parking assistance system, comprising:

a display screen having an input interface for identifying a display screen location;

an image processing unit, adapted to;

process multiple images which comprise views in different directions around a vehicle;

combine the multiple images to form a bird'"'"'s eye view on the display screen; and

superimpose an image representing the vehicle into the bird'"'"'s eye view on the display screen; and

a processor adapted to;

calculate a distance between a location represented on the display screen at a display screen location and a point around an edge of the vehicle, wherein the display screen location has been identified by a user through interaction with the input interface of the display screen; and

present a numerical representation of the calculated distance to the user.

2. A system as claimed in claim 1, wherein the input interface for identifying a display screen location comprises the display screen having a touch sensitive input surface.

3. A system as claimed in claim 1, wherein the input interface for identifying a display screen location comprises at least one of a remote control device, a joystick, and a moving cursor.

4. A system as claimed in claim 1, wherein the processor is adapted to control the image processing unit to present the numerical representation of the calculated distance to the user as an image overlay.

5. A system as claimed in claim 1, wherein the processor is adapted to control a speaker system to present the numerical representation of the calculated distance to the user as an audible message.

6. A system as claimed in claim 1, further comprising a set of cameras for generating the multiple images.

7. A system as claimed in claim 1, wherein the processor is adapted to calculate a distance between a set of locations represented on the display screen at display screen locations which have been identified by the user and respective points around the edge of the vehicle edge and present the numerical representations of the calculated distances to the user.

8. A system as claimed in claim 1, wherein the processor is adapted to calculate distance for a region of the display in which the region is identified based on sensor input, and present the calculated distance to the user as a grid pattern as superimposed on the image at the identified region.

9. A system as claimed in claim 1, wherein the processor is adapted to:

derive a distance between the display location which has been identified by the user and the point around the edge of the vehicle as a distance expressed as a number of pixels; and

convert the distance expressed as a number of pixels into a physical distance using a pixel to distance conversion factor.

10. A method of controlling a vehicle parking assistance system, comprising:

processing multiple images which comprise views in different directions around a vehicle;

combining the multiple images to form a bird'"'"'s eye view;

superimposing an image representing the vehicle into the bird'"'"'s eye view;

displaying the bird'"'"'s eye view on a display screen having an input interface for identifying a display screen location;

receiving an input to the display screen from the user through interaction with the input interface of the display device, wherein the user input to the display screen identifies a display screen location;

calculating a distance between a location as represented on the display screen at the identified display screen location and a point around the edge of the vehicle; and

presenting a numerical representation of the calculated distance to the user.

11. A method as claimed in claim 10, wherein the input is received as a touch input to a touch sensitive display.

12. A method as claimed in claim 10, further comprising presenting the numerical representation of the calculated distance to the user as one of an image overlay and an audible message.

13. A method as claimed in claim 10, further comprising calculating the distance between a set of locations represented on the display screen at display screen locations which have been identified by a user as touch inputs to the display screen and respective points around the edge of the vehicle edge and presenting the numerical representation of the calculated distances to the user.

14. A method as claimed in claim 10, further comprising:

deriving a distance between the display screen location which has been identified by the user and the point around the edge of the vehicle as a distance expressed as a number of pixels; and

converting the distance expressed as a number of pixels into a physical distance using a pixel to distance conversion factor.

15. A non-transitory computer readable storage medium that stored computer readable code, which when executed by a processor performs the steps of claim 10.