Vehicle light/display control system using camera

• US 10,682,966 B2
• Filed: 11/14/2018
• Issued: 06/16/2020
• Est. Priority Date: 11/16/2017
• Status: Active Grant

• Current Assignee: Magna Electronics Incorporated (Magna International Incorporated)
• Original Assignee: Magna Electronics Incorporated (Magna International Incorporated)
• Inventors: Koravadi, Krishna
• Primary Examiner(s): Richardson, Jany
• Application Number:
  US16/190,204
• Publication Number:
  US 20190143908A1
• Time in Patent Office: 580 Days
• Field of Search: None
• CPC Class Codes: B60Q 2300/314 Ambient light
• CPC Class Codes: B60R 1/24 in front of the vehicle
• CPC Class Codes: B60R 1/30 providing vision in the non-visible spectrum, e.g. night or infrared vision
• CPC Class Codes: B60R 11/04 Mounting of cameras operative during drive; Arrangement of controls thereof relative to the vehicle
• CPC Class Codes: B60R 2011/0026 Windows, e.g. windscreen
• CPC Class Codes: B60R 2300/103 using camera systems provided with artificial illumination device, e.g. IR light source
• CPC Class Codes: B60R 2300/106 using night vision cameras
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source

Abstract

A vision system for a vehicle includes a camera disposed at the vehicle and having a field of view exterior of the vehicle. The camera includes a lens and an imager. A control includes a processor that processes image data captured by the camera. A light emitting device includes at least one light emitting diode. The light emitting device, when the at least one light emitting diode is powered, emits near infrared light at a region encompassed by the field of view of the camera. The control, responsive to processing of image data captured by the camera, determines an ambient light level exterior the vehicle. The control, responsive to the determined ambient light level, automatically controls intensity of the near infrared light emitted by the light emitting device.

Claims

1. A vision system for a vehicle, said vision system comprising:

a camera disposed at a vehicle and having a field of view exterior and forward of the vehicle, said camera comprising a lens and an imager;

a control comprising a processor that processes image data captured by said camera;

wherein processing by said processor of image data captured by said camera determines a region of interest ahead of the vehicle within the field of view of said camera, wherein the determined region of interest is a sub-region of a larger region encompassed by the field of view of said camera;

a near infrared light emitting device comprising at least one light emitting diode, wherein said light emitting device, when said at least one light emitting diode is powered, emits near infrared radiation illuminating the larger region encompassed by the field of view of said camera;

wherein said control, responsive at least in part to processing of image data captured by said camera within the determined region of interest, determines an ambient light level exterior the vehicle at the determined region of interest;

wherein said control, responsive at least in part to the determined ambient light level at the determined region of interest being below a threshold level, automatically controls intensity of the near infrared radiation emitted by said near infrared light emitting device; and

wherein said control, with said control controlling intensity of the near infrared radiation emitted by said near infrared light emitting device to illuminate at least the determined region of interest, and responsive to processing of image data captured by said camera of the larger region, detects an object present within the larger region encompassed by the field of view of said camera.

2. The vision system of claim 1, wherein the field of view of said camera is forward of the vehicle.

3. The vision system of claim 2, wherein said near infrared light emitting device comprises a headlamp of the vehicle.

4. The vision system of claim 1, wherein said near infrared light emitting device comprises an auxiliary light of the vehicle.

5. The vision system of claim 1, wherein said control, responsive at least in part to the determined ambient light level, controls intensity of a display of the vehicle.

6. The vision system of claim 1, comprising a display operable to display images derived from image data captured by said camera, and wherein said control, responsive at least in part to the determined ambient light level, controls intensity of said display.

7. The vision system of claim 1, wherein said control determines the ambient light level exterior the vehicle when said near infrared light emitting device is deactivated.

8. The vision system of claim 1, wherein said control deactivates said near infrared light emitting device when the determined ambient light level is at or above a first threshold level.

9. The vision system of claim 8, wherein said control activates said near infrared light emitting device at a low level responsive to the determined ambient light level falling below the first threshold level.

10. The vision system of claim 9, wherein said control increases the intensity of the near infrared radiation emitted by said near infrared light emitting device from the low level to higher intensity levels responsive to the determined ambient light level decreasing to respective threshold levels below the first threshold level.

11. The vision system of claim 1, wherein said control estimates a total pixel brightness of the region of interest in the field of view of said camera, and wherein, at least in part responsive to the estimated total pixel brightness, said control controls intensity of the near infrared radiation emitted by said near infrared light emitting device.

12. The vision system of claim 11, wherein said control determines digital and analog gain as a function of exposure time.

13. The vision system of claim 12, wherein, at least in part responsive to the determined digital and analog gain, said control controls intensity of the near infrared radiation emitted by said near infrared light emitting device.

14. A vision system for a vehicle, said vision system comprising:

a camera disposed at a vehicle and having a field of view forward of the vehicle, said camera comprising a lens and an imager;

a control comprising a processor that processes image data captured by said camera;

wherein processing by said processor of image data captured by said camera determines a region of interest ahead of the vehicle within the field of view of said camera, wherein the determined region of interest is a sub-region of a larger region encompassed by the field of view of said camera;

a near infrared light emitting device comprising at least one light emitting diode, wherein said light emitting device, when said at least one light emitting diode is powered, emits near infrared radiation illuminating the larger region encompassed by the field of view of said camera;

wherein said control, responsive at least in part to processing of image data captured by said camera within the determined region of interest, determines an ambient light level exterior the vehicle at the determined region of interest;

wherein said control determines the ambient light level exterior the vehicle when said near infrared light emitting device is deactivated;

wherein said control, responsive at least in part to the determined ambient light level at the determined region of interest being below a threshold level, controls intensity of the near infrared radiation emitted by said near infrared light emitting device to illuminate at least the region of interest when the near infrared light emitting device is activated;

wherein said control, with said control controlling intensity of the near infrared radiation emitted by said near infrared light emitting device to illuminate at least the determined region of interest, and responsive to processing of image data captured by said camera of the larger region, detects an object present within the larger region encompassed by the field of view of said camera; and

wherein said control, responsive at least in part to the determined ambient light level, controls intensity of a display of the vehicle.

15. The vision system of claim 14, wherein said control estimates a total pixel brightness of the region of interest in the field of view of said camera, and wherein, at least in part responsive to the estimated total pixel brightness, said control controls intensity of the near infrared radiation emitted by said near infrared light emitting device.

16. The vision system of claim 15, wherein said control determines digital and analog gain as a function of exposure time.

17. The vision system of claim 16, wherein, at least in part responsive to the determined digital and analog gain, said control controls intensity of the near infrared radiation emitted by said near infrared light emitting device.

18. A vision system for a vehicle, said vision system comprising:

a camera disposed at a vehicle and having a field of view forward of the vehicle, said camera comprising a lens and an imager;

a control comprising a processor that processes image data captured by said camera;

wherein processing by said processor of image data captured by said camera determines a region of interest ahead of the vehicle within the field of view of said camera, wherein the determined region of interest is a sub-region of a larger region encompassed by the field of view of said camera;

a near infrared light emitting device comprising at least one light emitting diode, wherein said light emitting device, when said at least one light emitting diode is powered, emits near infrared radiation illuminating the larger region encompassed by the field of view of said camera;

wherein said control, responsive at least in part to processing of image data captured by said camera within the determined region of interest, determines an ambient light level exterior the vehicle at the determined region of interest;

wherein said control, responsive at least in part to the determined ambient light level at the determined region of interest being below a threshold level, controls intensity of the near infrared radiation emitted by said near infrared light emitting device to illuminate at least the determined region of interest;

wherein said control deactivates said near infrared light emitting device when the determined ambient light level is at or above a first threshold level;

wherein said control activates said near infrared light emitting device at a low level responsive to the determined ambient light level falling below the first threshold level;

wherein said control increases the intensity of the near infrared radiation emitted by said near infrared light emitting device from the low level to higher intensity levels responsive to the determined ambient light level decreasing to respective threshold levels below the first threshold level; and

wherein said control, with said control controlling intensity of the near infrared radiation emitted by said near infrared light emitting device to illuminate at least the determined region of interest, and responsive to processing of image data captured by said camera of the larger region, detects an object present within the larger region encompassed by the field of view of said camera.

19. The vision system of claim 18, wherein said control estimates a total pixel brightness of the region of interest in the field of view of said camera, and wherein, at least in part responsive to the estimated total pixel brightness, said control controls intensity of the near infrared radiation emitted by said near infrared light emitting device, and wherein said control determines digital and analog gain as a function of exposure time, and wherein, at least in part responsive to the determined digital and analog gain, said control controls intensity of the near infrared radiation emitted by said near infrared light emitting device.