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OPT8241-CDK-EVM: Depth Errors on Checkerboard Pattern

Steve Gieseking
Prodigy 80 points

Part Number: OPT8241-CDK-EVM

When imaging a flat checkerboard pattern, there are depth errors at the transitions between the light and dark squares.  The points that are not at the transitions give fairly consistent results.  Any way to improve the depth accuracy at these transitions?

  • 0
    TI__Mastermind 49176 points
    Hello Steve,

    We are looking into your query and will get back to you by next week.
  • 0
    TI__Expert 3495 points
    This is a known issue of TOF sensors that occurs at the border between two high contrast regions and photo electrons may leak to neighboring pixels.
    To mediate this issue it is recommend one apply a spatial "notch" filter where the kernel's center value (say a 3x3 kernel example) is -1 and neighbors are 0.125, or apply an equivalent 5x5 notch. Even more clever would be to first run a Sobel filter on the amplitude image, to find the high-contrast borders, then apply the notch filter to just those border points.