Head up display with reduced ghost artifacts
AssigneeHarman Becker Automotive Systems GmbH
InventorHarald SANFTMANN
Life of this patent
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Abstract
The application relates to a method for providing image data for a projection on a windscreen, the method comprising at an image processing unit the steps of determining an inverse filter function u to be used to remove ghost artifacts which occur when the image data are projected on the windscreen, determining a first image f to be projected on the windscreen, and determining a ghost function representing the ghost artifacts by which the first image to be projected is distorted when projected on the windscreen. The inverse filter is applied to the first image f in order to generate a filtered image, and the filtered image is provided to a projecting apparatus configured to project the filtered image onto the windscreen.
Claims24
A method for providing image data for a projection on a windscreen, the method comprising at an image processing unit:
- determining an inverse filter function to be used to remove ghost artifacts which occur when the image data are projected on a windscreen
- determining a first image to be projected on the windscreen,
- determining a ghost function representing the ghost artifacts by which the first image to be projected is distorted when projected on the windscreen,
- applying the inverse filter to the first image fin order to generate a filtered image, and
- providing the filtered image to a projecting apparatus configured to project the filtered image onto the windscreen, wherein the first image is a modulated image in which brightness values of at least some of pixels of an input image are adapted relative to the input image, wherein the brightness values are increased for the modulated image for a subset of the pixels of the input image.
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An image processing unit comprising:
- a memory and at least one processor, the memory containing instructions executable by the at least one processor,
- wherein the processor is configured to
- determine an inverse filter function to be used to remove ghost artifacts which occur when image data is projected on the windscreen,
- determine a first image to be projected on a windscreen,
- determine a ghost function representing the ghost artifacts by which the first image to be projected is distorted when projected on the windscreen,
- determine an inverse filter function to be used to remove the ghost artifacts,
- apply the inverse filter to the first image in order to generate a filtered image, and
- provide the filtered image to a projecting apparatus configured to project the filtered image onto the windscreen.
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Dependencies are inferred from the claim text.