Method for a distortion-free display

US7999760B2 · kind B2 · utility

Assignee

• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Juergen Giegold · Munich, DE
• Sebastian Loh · Munich, DE
• Thomas Mangold · Hersbruck, DE
• Martin Pinsker · Bruckberg, DE

Key dates

• Filing date: Dec 27, 2007
• Grant date: Aug 16, 2011
• Expiry date: Jun 14, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T5/80
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A method is provided for a distortion-free display of image elements, which are composed of computer-generated pixels and are reflected on a non-planar reflective surface, in particular a windshield of a motor vehicle. According to this method, pre-distorted image data are calculated by a computer unit in an operating phase as a function of the distortion properties of the reflective surface from the original image data of the image elements in accordance with the display-related pre-distortion parameters and are transferred to a display unit, which projects the image elements onto the reflective surface. In order to obtain the display-related pre-distortion parameters, at least one image element is provided, pre-distorted and projected in the form of original image data in a calibration phase in a procedure that is analogous to the operating phase; and the image data resulting from the projection are recorded using a camera and image processing, and compared with the original image data. During the calibration phase, at least two image data sets resulting from the projection are recorded from different camera positions and/or camera viewing angles.