Vehicle vision system with dirt detection

  • US 10,089,540 B2
  • Filed: 09/12/2016
  • Issued: 10/02/2018
  • Est. Priority Date: 02/20/2013
  • 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 camera disposed at a vehicle equipped with said vision system, said camera comprising an image sensor and a lens, wherein, when said camera is disposed at the equipped vehicle, said lens is exposed to the environment exterior the equipped vehicle;

    wherein said camera has an exterior field of view exterior the equipped vehicle and is operable to capture image data representative of a scene occurring in the field of view of said camera;

    an image processor operable to process multiple frames of image data captured by said camera while the vehicle is moving;

    wherein said image processor processes captured image data while the vehicle is moving to detect a blob in a first frame of captured image data;

    wherein, responsive to detecting, via processing the first frame of captured image data, the blob in the first frame of captured image data, said vision system determines at a first confidence level that the blob detected in the first frame of captured image data is indicative of a contaminant;

    wherein, responsive to said image processor determining, with the first confidence level being at least 80%, that the blob detected in the first frame of captured image data is indicative of a contaminant, said image processor adjusts processing when processing subsequent frames of captured image data;

    wherein adjustment of processing when processing the subsequent frames of captured image data comprises detecting, in a second frame of captured image data, image data associated with the blob detected in the first frame of captured image data; and

    wherein, responsive to said image processor determining, via processing of the second frame of captured image data, at a second confidence level of at least 80%, that the blob detected in the second frame of captured image data is indicative of a contaminant, said image processor determines that the blob detected in the second frame of captured image data is representative of a contaminant at said lens of said camera.

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