US 11,754,439 B2 · Method and device for photometrical charting of a license plate for a vehicle

Abstract

The invention relates to a method for photometrical charting of a reflectance standard (Z) illuminated by a license plate light (1). A camera (4) releasable by a control unit (5) is arranged and aligned relative to a holding device (3) configured for holding a reflectance standard (Z) in such a way, that a luminance density image (B1, B2) recorded by the camera (4) at least covers the reflective surface (Z.1) of a reflectance standard (Z) held by the holding device (3). A license plate light (1) is arranged in a positioning device (2) which is movable by the control unit (5). The positioning device (2) is controlled by the control unit (5) in such a way that the license plate light (1) arranged therein is traversed to at least one position (P1, P2), optionally to multiple positions (P1, P2) sequentially, relative to the reflectance standard (Z) arranged in the holding device (3) and held there. In each position (P1, P2), recording of at least one luminance density image (B1, B2) is triggered. An overall image (B) is formed from the recorded luminance density images (B1, B2) recorded by the camera (4). Furthermore, the invention relates to an arrangement for performing this method.

Claims16

Dependent claims

A method for photometrical charting of a reflectance standard illuminated by a license plate light, wherein

a camera releasable by a control unit is arranged and aligned relative to a holding device configured for holding a reflectance standard in such a way, that a luminance density image recorded by the camera at least covers the reflective surface of a reflectance standard held by the holding device,
the license plate light is arranged in a positioning device which is movable by the control unit,
the reflectance standard is arranged in the holding device in such a way that a reflective surface of the reflectance standard is captured by the camera,
the positioning device is controlled by the control unit in such a way that the license plate light arranged therein is traversed to at least one position, optionally to multiple positions sequentially, relative to the reflectance standard arranged in the holding device and held there, wherein
in each position, recording of at least one luminance density image by the camera is triggered by means of the control unit with the license plate light on, and
an overall image is formed by superposing of at least the recorded density distribution images.

3 more elements

An arrangement, comprising a control unit, a holding device configured for holding a reflectance standard, a camera configured for recording luminance density images of a reflectance standard held in the holding device, and a positioning device configured for holding a license plate light,

wherein the control unit is coupled with the camera and with the positioning device and configured to traverse a license plate light held by the positioning device to at least one predetermined position, optionally to multiple predetermined positions sequentially, relative to the holding device, to switch on the license plate light and to release the recording of at least one luminance density image by the camera, and
wherein the control unit and/or the camera are/is configured to determine an overall image from a plurality of luminance density images recorded by the camera.

Dependencies are inferred from the claim text.

Method and device for photometrical charting of a license plate for a vehicle

Life of this patent

Method and device for photometrical charting of a license plate for a vehicle

Life of this patent

Abstract

Claims16