FRONT CAMERA(for Stereo Camera Type) BEFORE STARTING ADJUSTMENT

CAUTION / NOTICE / HINT

Note

When replacing the windshield glass of a vehicle equipped with an object recognition camera, make sure to use a Lexus genuine part. If a non-Lexus genuine part is used, the object recognition camera may not be able to be installed due to a missing bracket. Also, the dynamic radar cruise control system (for Stereo camera type), front camera system (for Stereo camera type), lane control system (for Stereo camera type), road sign assist system (for Stereo camera type), pre-collision system (for Stereo camera type) or adaptive high beam system may not operate properly due to a difference in the transmissivity or black ceramic border.

Tech Tips


  1. Purpose of object Recognition Camera Optical Axis Learning


    1. If the installation position or orientation of the object recognition camera is changed due to it being replaced with a new one or the windshield glass sub-assembly being replaced or removed and installed, it is necessary to perform object recognition camera optical axis learning for the object recognition camera to learn the driving direction of the vehicle and its horizontal axis in order for each driving support system to operate correctly.

  2. Characteristics of object Recognition Camera


    1. As the object recognition camera recognizes targets using image processing based on differences in contrast, when performing object recognition camera optical axis learning, if there are overhead lights, windows, reflective objects, or high contrast objects behind the target, the contrast between background objects may be detected as high and may be misrecognized as a target.

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    2. By blocking objects behind the target which may be misrecognized as a target, the object recognition camera can more easily recognize the target and complete object recognition camera optical axis learning.

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      *a Target - -
      B004VH3 Target recognition area - -

    3. Object recognition camera optical axis learning may fail if it is performed under any of the following conditions.


      1. Light Shining from Behind Target (Backlit)

        As the target will appear dark to the camera if the target is backlit, the contrast of the black and white parts of the target will decrease and the target may not be recognized.

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      2. Target Partially Illuminated by Light from Windows

        If the surface of the target is unevenly illuminated, the contrast of the black and white parts of the target will decrease and the target may not be recognized.

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      3. Entire Target not Illuminated

        If the target is placed in an area that is dark, the contrast between the target and the background will decrease and the target may not be recognized.

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      4. Shadow of Target is Cast onto Wall

        Make sure that the shadow of the target is cast onto a wall as this may cause a target recognition error.

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      5. Reflective Object on Target Surface

        If an object, such as clear adhesive tape, is attached to the target surface or if the target is laminated, the target surface will reflect light. As the reflected light will appear white to the camera, the target may not be recognized.

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        *a Actual Target *b Target as Seen by Object Recognition Camera
        B004VGX Reflective Object or Surface - -

      6. Border of Black and White Parts of Target are Blurry or Distorted

        If the borders of the black and white parts of the target appear blurry to the camera, the detected contrast will be low and the target may not be recognized.

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      7. Target is Moving

        If the target is moving, due to being blown by the wind, etc., it may not be recognized.

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      8. Target and Vehicle are not Level

        If the target and vehicle are not level when learning is performed, an incorrect center of the direction of travel of the vehicle may be learned or the object recognition camera may not be able to detect the target.

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  3. Recognition Method


    1. Object recognition camera optical axis learning can be performed by using Sequential Recognition.

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      *A for One Time Recognition *B for Sequential Recognition
      Recognition Method Target Position Number of Times Target Recognition Performed
      One Time Recognition 1 (In front of front bumper) 1
      Sequential Recognition 3 (3 m (9.84 ft.) from the object recognition camera) 3

      • One Time Recognition is an optical axis learning method in which 3 targets are recognized simultaneously at 1 position directly in front of the front bumper.

      • Sequential Recognition is an optical axis learning method in which 1 target is recognized sequentially at 3 positions 3 m (9.84 ft.) from the object recognition camera.

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