Abstract: A method for registering multiple projectors on a vertically extruded three dimensional display surface with a known aspect ratio includes recovering both the camera parameters and the three dimensional shape of the surface from a single image of the display surface from an uncalibrated camera, capturing images from the projectors to relate the projector coordinates with the display surface points, and segmenting parts of the image for each projector to register the projectors to create a seamlessly wall-paper projection on the display surface using a representation between the projector coordinates with display surface points using a rational Bezier patch. A method for performing a deterministic geometric auto-calibration to find intrinsic and extrinsic parameters of each projector is included.

Abstract: A projector configured to provide higher resolution output without increasing pixel resolution in a light modulator is disclosed. The projector may introduce an optical element between a light modulator and an imaging lens. The optical element may provide pixel sharing of a target image. The pixel sharing may be produced by, for example, making smaller copies of pixels. Selected copies of pixels may be passed to the imaging lens to display an output image with selected areas of higher density pixels.

Abstract: An augmented reality scene may be registered onto an arbitrary surface. A camera may capture an image of the arbitrary surface. The camera may analyze the surface geometry of the arbitrary surface. In some embodiments, a processing computing device may analyze data captured by the camera and an adjacent camera to reconstruct the surface geometry of the arbitrary surface. A scene may be registered to a three dimensional coordinate system corresponding to the arbitrary surface. A projector may project the scene onto the arbitrary surface according to the registration so that the scene may not display as being distorted.

Abstract: A method includes generating in a computer a representation for the color transfer function both direct and inverse, of a nonideal source device to those in a target device significantly different than the source device, using higher-dimensional Bezier patches by using a non-linear parameterization of the Bezier patches in the XYZ space for converting the RGB colors in the source device. The method is illustrated in an application for processing spatial variation in luminance and chrominance in a multiple projector display, which include the steps of balancing per projector white point, morphing per pixel chrominance gamut, constraining per pixel perceptual luminance; and smoothing per pixel Bezier based luminance.

Abstract: A projector configured to provide higher resolution output without increasing pixel resolution in a light modulator is disclosed. The projector may introduce an optical element between a light modulator and an imaging lens. The optical element may provide pixel sharing of a target image. The pixel sharing may be produced by, for example, making smaller copies of pixels. Selected copies of pixels may be passed to the imaging lens to display an output image with selected areas of higher density pixels.

Abstract: Keystone correction for a projector. An uncorrected graphic is displayed on a display unit utilizing pixels. The uncorrected graphic is projected from the display unit onto a projection screen to form an uncorrected image. An orientation of the uncorrected image relative to the projection screen is captured. The uncorrected graphic is transformed into a pre-distorted graphic for projection from the display unit onto the projection screen so as to form a corrected image with an orientation more aligned with the projection screen than the orientation of the uncorrected image and such that the pre-distorted graphic utilizes more pixels in the display unit than a second pre-distorted graphic, wherein if formed, would be formed by transforming the uncorrected graphic such that the second pre-distorted graphic forms a second corrected image with a maximum rectangular area inside the uncorrected image when projected from the display unit onto the projection screen.

Abstract: A method for registering multiple projectors on a vertically extruded three dimensional display surface with a known aspect ratio includes recovering both the camera parameters and the three dimensional shape of the surface from a single image of the display surface from an uncalibrated camera, capturing images from the projectors to relate the projector coordinates with the display surface points, and segmenting parts of the image for each projector to register the projectors to create a seamlessly wall-paper projection on the display surface using a representation between the projector coordinates with display surface points using a rational Bezier patch. A method for performing a deterministic geometric auto-calibration to find intrinsic and extrinsic parameters of each projector is included.

Abstract: A method includes generating in a computer a representation for the color transfer function both direct and inverse, of a nonideal source device to those in a target device significantly different than the source device, using higher-dimensional Bezier patches by using a non-linear parameterization of the Bezier patches in the XYZ space for converting the RGB colors in the source device. The method is illustrated in an application for processing spatial variation in luminance and chrominance in a multiple projector display, which include the steps of balancing per projector white point, morphing per pixel chrominance gamut, constraining per pixel perceptual luminance; and smoothing per pixel Bezier based luminance.

Abstract: Focus adjustment for a projector which includes a projection lens having an adjustable focus position. An asymmetrically focused pattern is projected through the projection lens onto a projection screen, wherein the asymmetrically focused pattern is imaged by the projection lens onto the projection screen with a focus at one portion on the screen that differs with focus at another portion thereof. An image of the asymmetrically focused pattern is captured from the projection screen. A focus adjustment direction is calculated by using asymmetrical aspects of the captured image of the asymmetrically focused pattern. The focus position of the projection lens is driven in the calculated focus adjustment direction so as to move from an out-of-focus state of the projection lens toward an in-focus state.

Abstract: Keystone correction for a projector. An uncorrected graphic is displayed on a display unit utilizing pixels. The uncorrected graphic is projected from the display unit onto a projection screen to form an uncorrected image. An orientation of the uncorrected image relative to the projection screen is captured. The uncorrected graphic is transformed into a pre-distorted graphic for projection from the display unit onto the projection screen so as to form a corrected image with an orientation more aligned with the projection screen than the orientation of the uncorrected image and such that the pre-distorted graphic utilizes more pixels in the display unit than a second pre-distorted graphic, wherein if formed, would be formed by transforming the uncorrected graphic such that the second pre-distorted graphic forms a second corrected image with a maximum rectangular area inside the uncorrected image when projected from the display unit onto the projection screen.

Abstract: Focus adjustment for a projector which includes a projection lens having an adjustable focus position. An asymmetrically focused pattern is projected through the projection lens onto a projection screen, wherein the asymmetrically focused pattern is imaged by the projection lens onto the projection screen with a focus at one portion on the screen that differs with focus at another portion thereof. An image of the asymmetrically focused pattern is captured from the projection screen. A focus adjustment direction is calculated by using asymmetrical aspects of the captured image of the asymmetrically focused pattern. The focus position of the projection lens is driven in the calculated focus adjustment direction so as to move from an out-of-focus state of the projection lens toward an in-focus state.