Stereo camera for a motor vehicle

• US 8,743,202 B2
• Filed: 11/21/2005
• Issued: 06/03/2014
• Est. Priority Date: 12/23/2004
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Schick, Jens, Schmack, Andreas, Fritz, Steffen
• Primary Examiner(s): YI, DAVID
• Application Number:
  US11/794,015
• Publication Number:
  US 20080199069A1
• Time in Patent Office: 3,116 Days
• Field of Search: 348/148, 382/154
• US Class Current: 348/148
• CPC Class Codes: G01S 11/12 using electromagnetic waves other than radio waves
• CPC Class Codes: H04N 13/239 using two 2D image sensors having a relative position equal to or related to the interocular distance H04N13/243 takes precedence
• CPC Class Codes: H04N 13/25 using two or more image sensors with different characteristics other than in their location or field of view, e.g. having different resolutions or colour pickup characteristics; using image signals from one sensor to control the characteristics of another sensor
• CPC Class Codes: H04N 13/257 Colour aspects

Abstract

A device is described for a motor vehicle, having at least one first camera and at least one second camera, the first camera and the second camera acting as a stereo camera, the first camera and the second camera being different with respect to at least one camera property, in particular the light sensitivity of the first camera and the light sensitivity of the second camera being different. Furthermore the device is configured in such a way that the driver assistance function of night vision support and/or traffic sign recognition and/or object recognition and/or road boundary recognition and/or lane recognition and/or other functions are ensured.

Claims

1. A device for a motor vehicle, comprising:

a first camera and a second camera, wherein the first camera and the second camera are configured to at least one of (a) function as a stereo camera for at least a part of a recording of each of the first and second cameras to be simultaneously of a same scene, and (b) produce different images for a same imaging stimulus; and

a processor configured to;

perform a traffic sign recognition function based on color values of a color image obtained from the first camera and without regard to output of the second camera;

perform a night vision support function based on an image obtained from the second camera and without regard to output of the first camera;

convert the color image obtained from the first camera into a grayscale image; and

perform a driver assistance function, that includes at least one of object recognition, carriageway edge recognition, and lane recognition, based on a combination of the grayscale image and the image obtained from the second camera.

2. The device as recited in claim 1, wherein the first camera and the second camera are configured to produce different images for the same imaging stimulus.

3. The device as recited in claim 1, wherein the first camera and the second camera are configured to function as the stereo camera for the at least the part of the recording of each of the first and second cameras to be simultaneously of a same scene.

4. The device as recited in claim 2, wherein a light sensitivity of the first camera is higher than a light sensitivity of the second camera.

5. The device as recited in claim 2, wherein the second camera is a black-and-white camera.

6. The device as recited in claim 2, wherein the first and second cameras differ from each other with respect to at least one of a focal width of a lens, an aperture of a lens, a coating on a lens, and an optical filter of the camera.

7. The device as recited in claim 2, wherein the first and second cameras differ with respect to at least one of an image sensor technology, a spectral sensitivity, and a spectral sensitivity of at least one color channel.

8. The device as recited in claim 2, wherein the first and second cameras differ from each other with respect to at least one of a resolution of the camera interface, at least one exposure parameter, and an image rate.

9. The device as recited in claim 2, wherein the device is configured in such a way that at least one of an image of the first camera and an image of the second camera is processed with regard to at least one image property so that images of the first and second cameras are almost the same with respect to the at least one image property after processing.

10. The device as recited in claim 9, wherein the image property is at least one of a horizontal geometric resolution of the image, a vertical geometric resolution of the image, a gray-scale value resolution of the image, and an image brightness.

11. The device as recited in claim 2, wherein the first and second cameras differ from each other with respect to at least one of a pixel size, a pixel geometry, a horizontal geometric resolution, and a vertical geometric resolution.

12. The device as recited in claim 1, wherein the second camera is not adapted for producing color images.