Target for multispectral geometrical calibration
AssigneeForesight Automotive Ltd.
InventorsMoshe Danziger, Daniel Brosh, Shaked Yarden
Life of this patent
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Abstract
A target and a method of calibration of an IR camera unit is disclosed. The target may include, a substantially flat metallic plate, such that a first surface of the metallic plate has a surface roughness of between N9 to N10; and a pattern made from a polymeric ink applied on the first surface. The method may include, receiving from an IR camera, included in the camera unit, an image of the target taken in the infrared spectrum; extracting parameters, related to the camera, form the image; and calibrating the camera based on the extracted first parameters.
Claims14
A target for multispectral geometrical calibration, comprising:
- a substantially flat metallic plate, wherein a first surface of the metallic plate has a surface roughness of between N9 to N10;
- a pattern made from a polymeric ink applied on the first surface;
- an array of a plurality of heating elements, attached to a second surface of the flat metallic plate;
- and
- a controller configured to control the heating elements to heat the target, to a temperature of 1° C. to 5° C. above room temperature.
A method of calibrating a multispectral camera unit, comprising:
- receiving from a first camera, included in the camera unit, a first image of a target taken in a first spectral band;
- extracting first parameters, related to the first camera, form the first image;
- receiving from a second camera, included in the camera unit, a second image of the target taken in a second spectral band;
- extracting second parameters, related to the second camera, form the second image;
- and
- simultaneously calibrating the first camera and the second camera based on the extracted first parameters and the extracted second parameters;
- wherein the target comprises:
- a substantially flat metallic plate, wherein a first surface of the metallic plate has a surface roughness of between N9 to N10;
- a pattern made from a polymeric ink applied on the first surface;
- an array of a plurality of heating elements, attached to a second surface of the flat metallic plate;
- and
- a controller configured to control the plurality of heating elements to heat the target, to a temperature of 1° C. to 5° C. above room temperature.
Dependencies are inferred from the claim text.