Method of immersive rendering for wide field of view

1. A method of adjustment of computer generated graphic images to reduce a registration error due to the assumption of linear perspective rendering in immersive display systems comprising:

rendering a view of a computer graphics scene at a specified pose based on a linear perspective;

reducing a radial distance of pixels in said view from the center by a sine function to generate a modified image, wherein a scaling factor, k, is used with the sine function based on a ratio of the field of view (FoV) in radians to the total number of pixels (R) spanning said FoV, such that k=FoV/R; and

providing the modified image to a display.

2. The method of claim 1 , wherein the radial distance of at least one pixel in polar coordinates (Pr, θ) is transformed to Pr′=[sin(kPr)]/k.

3. A method of adjustment of computer generated graphic images to reduce a registration error due to the assumption of linear perspective rendering in immersive display systems comprising the steps:

rendering a view of a computer graphics scene at a specified pose based on a linear perspective to generate a first array of pixels in Cartesian coordinates;

transforming the first array into polar coordinates;

reducing a radial distance of pixels in said first array by a sine function to form a second array, wherein a scaling factor, k, is used with the sine function based on a ratio of the field of view (FoV) in radians to the total number of pixels (R) spanning said FoV, such that k=FoV/R;

transforming the second array into Cartesian coordinates to generate a modified image; and

displaying the modified image.

4. The method of claim 3 , wherein reducing the radial distance comprises a transformation of the radial distance in polar coordinates (Pr, θ) to Pr′=[sin(kPr)]/k.

5. A method of adjustment of computer generated graphic images to reduce a registration error due to the assumption of linear perspective rendering in immersive display systems comprising:

rendering a view of a computer graphics scene at a specified pose assuming linear perspective associated with a pinhole camera model;

generating a modified image by reducing a radial distance of pixels in said view from a center to counteract an off center registration error generated by use of a linear perspective pinhole camera model to generate the rendered view; and

providing said modified image to a display.

6. A head mounted augmented reality display system, comprising:

a glasses frame;

at least one image projector mounted to the frame;

a graphics processing unit to render images to be projected by the at least one image projector; and

a registration correction unit to distort rendered images, prior to projection, by transforming a radial distance of pixels towards a center of the image to counteract an off center registration error generated by use of a linear perspective pinhole camera model to generate the rendered view.

7. The head mounted augmented reality display system of claim 6 , wherein said registration correction unit reduces the radial distance of pixels to be projected by a sine function, wherein a scaling factor, k, is used with the sine function based on a ratio of the field of view (FoV) in radians to the total number of pixels (R) spanning said FoV, such that k=FoV/R.

8. The head mounted augmented reality display system of claim 7 , wherein the registration correction unit:

converts rendered images from Cartesian coordinates into a first array of pixels in polar coordinates;

generates a second array of pixels, in polar coordinates by distorting the polar radius of pixels in the first array by a sine function, wherein a scaling factor, k, is used with the sine function based on a ratio of the field of view (FoV) in radians to the total number of pixels (R) spanning said FoV, such that k=FoV/R; and

converts the second array into an array of pixels in Cartesian coordinates.

9. The head mounted augmented reality display system of claim 8 , wherein the first array has polar coordinates (Pr, θ) and the second array has the radial distance of pixels transformed to Pr′=[sin(kPr)]/k.

10. A head mounted augmented reality display system, comprising:

a graphics processing unit to render images to be projected by at least one image projector; and

a registration correction unit to distort rendered images, prior to projection, by transforming a radial distance of pixels towards the center of the image to counteract an off center registration error generated by the use of a linear perspective pinhole camera model to generate the rendered view.

11. The head mounted augmented reality display system of claim 10 , wherein said registration correction unit reduces the radial distance of pixels in a view of a computer graphics scene to be projected by a scaled sine function.

12. The head mounted augmented reality display system of claim 10 , wherein the registration correction unit distorts rendered images in polar coordinates according to a sine function with a scaling factor, k, used with the sine function based on a ratio of the field of view (FoV) in radians to the total number of pixels (R) spanning said FoV, such that k=FoV/R.