Patent ID: 11900695
Assignee: NEC CORPORATION OF AMERICA
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. A system for detecting road marking in infrared spectral range, comprising:
at least one processor configured to execute a code, the code comprising:
code instruction to receive at least one infrared image depicting, in at least one infrared spectral range, a portion of an edge of a road surface painted with road markings expressed using alternating high and low infrared reflective tiles and at least one visible light image depicting the portion of a road surface in visible light spectral range, the infrared reflective tiles are painted using at least one paint material characterized by: (1) reflecting light in visible light spectral range deviating less than a first value from the light reflected by the road surface, and (2) reflecting light in an infrared spectral range deviating more than a second value from the light reflected by the road surface;
code instruction to register the at least one infrared image to the at least one visible light image;
code instruction to compute a ratio between an infrared reflectiveness value of each of a plurality of pixels of the at least one infrared image and a luminance value computed for a corresponding pixel in the registered at least one visible light image; and
code instruction to detect at least one high reflectiveness tile and at least one low reflectiveness tile based on a difference between the ratio of adjacent pixels exceeding a third value.