Vehicular multi-camera vision system

  • US 9,769,381 B2
  • Filed: 11/28/2016
  • Issued: 09/19/2017
  • Est. Priority Date: 05/06/2013
  • Status: Active Grant
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First Claim
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1. A vision system for a vehicle, said vision system comprising:

  • a plurality of cameras disposed at a vehicle and having respective fields of view exterior of the vehicle;

    wherein said plurality of cameras comprises a forward viewing camera having at least a forward field of view forward of the vehicle, a rearward viewing camera having at least a rearward field of view rearward of the vehicle, a driver-side sideward viewing camera having at least a sideward field of view at the driver side of the vehicle and a passenger-side sideward viewing camera having at least a sideward field of view at the passenger side of the vehicle;

    wherein one of said plurality of cameras functions as a master camera and other cameras of said plurality of cameras function as slave cameras;

    an image processing system operable to process image data captured by said plurality of cameras;

    wherein, responsive to processing of captured image data, said vision system is operable to synthesize a composite image derived from image data captured by at least two cameras of said plurality of cameras;

    wherein at least one of said at least two cameras comprises a slave camera;

    wherein operating parameters of the master camera are used by slave cameras of said plurality of cameras;

    wherein operating parameters of the master camera comprise at least one of (i) white balance and (ii) color control;

    wherein each of said plurality of cameras receives and sends signals via an Ethernet connection to an electronic control unit;

    wherein operating parameters of the master camera are carried via Ethernet connection between the master camera and the electronic control unit;

    wherein the electronic control unit sends via Ethernet connection operating parameters carried via Ethernet connection between the master camera and the electronic control unit to said at least one of said at least two cameras that comprises a slave camera so that image sections of the composite image, when displayed to a driver of the vehicle by a display device of the vehicle, appear uniform in at least one of (i) brightness at the borders of the sections and (ii) color at the borders of the sections;

    wherein Ethernet connection to said at least one of said at least two cameras that comprises a slave camera comprises utilization of a network hub that routes camera image signal processing control commands from the master camera to said at least one of at least two cameras that comprises a slave camera; and

    wherein the network hub is one of (i) part of the master camera and (ii) part of a separate electronic control unit separate from the master camera.

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