Method for a distortion-free display
First Claim
1. A method for displaying image elements, composed of computer-generated pixels and reflected on a non-planar reflective surface, for a substantially distortion-free display the method comprising the acts of:
- calculating pre-distorted image data by a computer unit in an operating phase, based on distortion characteristics of the reflected surface, from original image data of the image elements in accordance with pre-distortion parameters related to a display;
transferring the pre-distorted image data to a display device, and projecting image elements onto the reflective surface;
in order to obtain the pre-distortion parameters related to the display device, in a calibration phase recording at least two image data records captured from at least one of different camera positions and camera angles, the recorded at least two image data records resulting from a projection of at least one image element that is pre-distorted and projected in a form of original image data using a same procedure as in an operating phase, wherein the recorded at least two image data sets is compared with the original image data.
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Accused Products
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.
11 Citations
19 Claims
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1. A method for displaying image elements, composed of computer-generated pixels and reflected on a non-planar reflective surface, for a substantially distortion-free display the method comprising the acts of:
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calculating pre-distorted image data by a computer unit in an operating phase, based on distortion characteristics of the reflected surface, from original image data of the image elements in accordance with pre-distortion parameters related to a display; transferring the pre-distorted image data to a display device, and projecting image elements onto the reflective surface; in order to obtain the pre-distortion parameters related to the display device, in a calibration phase recording at least two image data records captured from at least one of different camera positions and camera angles, the recorded at least two image data records resulting from a projection of at least one image element that is pre-distorted and projected in a form of original image data using a same procedure as in an operating phase, wherein the recorded at least two image data sets is compared with the original image data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of displaying image elements composed of computer-generated pixels reflected on a non-planar reflective surface in a motor vehicle, the method comprising the acts of:
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in an operating phase of a display unit, calculating pre-distorted image data based on distortion characteristics of the non-planar reflective surface from original image data of the computer-generated pixels as a function of pre-distortion parameters of the display; and transferring the pre-distorted image data to the display unit for projecting the image elements onto the non-planar reflective surface; obtaining the pre-distortion parameters of the display by, in a calibration phase, projecting pre-distorted image data in the form of original image data using a same procedure as in the operating phase and recording at least two image data records for comparison with the original image data, wherein the at least two image data records are captured from at least one of different camera positions and different camera angles. - View Dependent Claims (18, 19)
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Specification