Vehicle camera image quality improvement in poor visibility conditions by contrast amplification

  • US 9,681,062 B2
  • Filed: 09/25/2012
  • Issued: 06/13/2017
  • Est. Priority Date: 09/26/2011
  • Status: Active Grant
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First Claim
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1. A vision system for a vehicle, said vision system comprising:

  • an imaging sensor disposed at the vehicle and having an exterior field of view, said imaging sensor capturing image data;

    an image processor operable to process successive frames of captured image data;

    wherein, responsive to a determination of a low visibility driving condition, said image processor increases contrast of features in the captured image data by brightening brighter areas and dampening darker areas of the captured image data, and wherein said image processor increases contrast of features in the captured image data over multiple successive frames of captured image data to enhance discrimination of objects present in the field of view of said imaging sensor; and

    wherein said vision system, via image processing of multiple successive frames of captured image data during a determined low visibility driving condition, tracks, from frame to frame, image flow of features caused by movement of the vehicle to enhance detection and identification of objects present in the exterior field of view of said imaging sensor.

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