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US 11,153,539 B2Granted
Methods and systems to pre-warp and image
AssigneeGoogle Inc.
InventorsIsaac James Deroche, Lai Pong Wong, Stuart James Myron Nicholson, Jerrold Richard Randell, Dustin Griesdorf
Life of this patent
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Abstract
There is provided a method including obtaining an initial spatial coordinate of a pixel of an image to be projected. The method may also include generating a pre-warped spatial coordinate associated with the initial spatial coordinate. The pre-warped spatial coordinate may be calculated as a sum of a value of a warp path function at the initial spatial coordinate and a delta. Moreover, the method may include outputting the pre-warped spatial coordinate.
Claims20
A method comprising:
- obtaining a set of initial spatial coordinates of a pixel of an image to be projected, the set of initial spatial coordinates comprising a first initial spatial coordinate corresponding to a first dimension and a second initial spatial coordinate corresponding to a second dimension;
- selecting a first function based on a first value of the second initial spatial coordinate;
- generating a first pre-warped spatial coordinate associated with the first initial spatial coordinate using the first function, the first function comprising a sum of:
- a value of a first warp path function at the first spatial coordinate;
- and
- a first delta;
- and
- outputting the first pre-warped spatial coordinate.
5 more elements
A method comprising:
- obtaining an initial spatial coordinate of a pixel of an image to be projected, the initial spatial coordinate associated with a first temperature associated with an image projection device to project the pixel;
- obtaining a second temperature associated with the image projection device;
- generating a pre-warped spatial coordinate of the pixel associated with the initial spatial coordinate, the pre-warped spatial coordinate calculated as a sum of:
- the initial spatial coordinate;
- and
- a product of a temperature change and a temperature deviation function, the temperature change comprising a difference between the second temperature and the first temperature, and the temperature deviation function describing a temperature-normalized inverse change in the initial spatial coordinate as a function of change in temperature;
- and
- outputting the pre-warped spatial coordinate.
5 more elements
A system comprising:
- a light source to generate a source light;
- a spatial modulator to receive the source light from the light source;
- a display element to receive the source light from the spatial modulator and direct the source light towards an eye of a viewer;
- and
- a controller in communication with the light source and the spatial modulator, the controller to:
- obtain a set of spatial coordinates of a pixel of an image to be projected, the set of spatial coordinates comprising a first spatial coordinate corresponding to a first dimension and a second spatial coordinate corresponding to a second dimension;
- generate a first pre-warped spatial coordinate associated with the first spatial coordinate, the first pre-warped spatial coordinate calculated as a sum of:
- a value of a first warp path function at the first spatial coordinate;
- and
- a first delta selected based on the second spatial coordinate and a first initial spatial coordinate, the first initial spatial coordinate corresponding to the second dimension;
- and
- control the spatial modulator to project the pixel using the first pre-warped spatial coordinate.
9 more elements
Dependencies are inferred from the claim text.