Detection of a sheet of light based on second derivative

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United States of America Patent

PATENT NO 9754374
SERIAL NO

15042860

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Abstract

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A method for detecting a position of a sheet of light is described. A second derivative filter is applied to an intensity profile of a line of pixels. An ingress pixel position associated with an ingress zero-crossing second derivative value is determined. The ingress pixel position is between a first pixel position with a first minimum intensity value of the intensity profile and a second pixel position with a first maximum intensity value of the intensity profile. An egress pixel position associated with an egress zero-crossing second derivative value is determined. The egress pixel position is between a third pixel position with a second maximum intensity value of the intensity profile and a fourth pixel position with a second minimum intensity value of the intensity profile. A midpoint pixel position between the ingress pixel position and the egress pixel position is output as the position of the sheet of light.

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Patent Owner(s)

  • MATROX ELECTRONIC SYSTEMS, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lina, Arnaud Dorval, CA 6 21

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