Abstract: A system for automatic color matching of multiple displays in a multi-display system. A sensor observes the output energy of each of the displays in a multi-display system and measures the difference in the color responses for a given input color. This difference is used to derive a modification function that is applied to each display. The displays are modified accordingly, and then the color is displayed again. This process is repeated until the measured values from each of the displays are within a minimum measurement error tolerance, so that the differences in displayed colors observed among the displays are minimized.

Abstract: A system and method for measuring and then correcting the color response from multiple projectors or display devices so that the devices can generate a color response that is uniform. An area light sensor (such as a commodity camera) is used to measure the color responses of each display and then to derive a model of the color transfer function for each display using a pattern of predetermined areas or regions displayed on each display device.

Abstract: A system for automatic color matching of multiple displays in a multi-display system. A sensor observes the output energy of each of the displays in a multi-display system and measures the difference in the color responses for a given input color. This difference is used to derive a modification function that is applied to each display. The displays are modified accordingly, and then the color is displayed again. This process is repeated until the measured values from each of the displays are within a minimum measurement error tolerance, so that the differences in displayed colors observed among the displays are minimized.

Abstract: A system for automatic color matching of multiple displays in a multi-display system. A sensor observes the output energy of each of the displays in a multi-display system and measures the difference in the color responses for a given input color. This difference is used to derive a modification function that is applied to each display. The displays are modified accordingly, and then the color is displayed again. This process is repeated until the measured values from each of the displays are within a minimum measurement error tolerance, so that the differences in displayed colors observed among the displays are minimized.

Abstract: A method of calibrating a multi-projector image display system is provided. According to the method, non-parametric calibration data for the display system is recovered and used to generate a non-parametric model of the display system. Local parametric models relating to the display surface of the projection screen are generated and are compared with data points defined by the non-parametric calibration data to identify one or more local errors in the non-parametric calibration data. The local errors in the non-parametric calibration data are converted to data points defined at least in part by the local parametric models and the projectors are operated to project an image on the image projection screen by utilizing a hybrid calibration model comprising data points taken from the non-parametric model and data points taken from one or more local parametric models. Additional embodiments are disclosed and claimed.

Abstract: A method of calibrating a multi-projector image display system is provided. According to the method, non-parametric calibration data for the display system is recovered and used to generate a non-parametric model of the display system. Local parametric models relating to the display surface of the projection screen are generated and are compared with data points defined by the non-parametric calibration data to identify one or more local errors in the non-parametric calibration data. The local errors in the non-parametric calibration data are converted to data points defined at least in part by the local parametric models and the projectors are operated to project an image on the image projection screen by utilizing a hybrid calibration model comprising data points taken from the non-parametric model and data points taken from one or more local parametric models. Additional embodiments are disclosed and claimed.

Abstract: A system for automatic color matching of multiple displays in a multi-display system. A sensor observes the output energy of each of the displays in a multi-display system and measures the difference in the color responses for a given input color. This difference is used to derive a modification function that is applied to each display. The displays are modified accordingly, and then the color is displayed again. This process is repeated until the measured values from each of the displays are within a minimum measurement error tolerance, so that the differences in displayed colors observed among the displays are minimized.

Abstract: A method of calibrating a multi-projector image display system is provided. According to the method, non-parametric calibration data for the display system is recovered and used to generate a non-parametric model of the display system. Local parametric models relating to the display surface of the projection screen are generated and are compared with data points defined by the non-parametric calibration data to identify one or more local errors in the non-parametric calibration data. The local errors in the non-parametric calibration data are converted to data points defined at least in part by the local parametric models and the projectors are operated to project an image on the image projection screen by utilizing a hybrid calibration model comprising data points taken from the non-parametric model and data points taken from one or more local parametric models. Additional embodiments are disclosed and claimed.

Abstract: A method of generating a display from a plurality of color image display sources such as a projector or a video monitor. The non-linear color response is first determined for each projector/monitor by using a color camera or other sensor to capture a displayed image. Each of the display sources is then linearized using the inverse of the respective non-linear color response. A common reachable gamut is derived in an observed color space for each of the sources. A transform is determined that maps an observed gamut to a target device-specific color space for each of the display sources. The respective transform is then applied to color values input to each of the display sources to make more similar the observed color response of each of the displays.

Abstract: A method and system for calibrating and operating projection systems where one or more projectors are utilized to project an image. One or more projectors are oriented to project an image on a projection screen and one or more image sensors are oriented to acquire the projected image. Three-dimensional position coordinates of the respective image fiducials as projected on the screen are identified by applying three-dimensional mapping functions to represent the manner in which two-dimensional points in a projector frame map to three-dimensional points on the projection screen. Parametric functions are fit to a neighborhood of points representing the three-dimensional image fiducial position coordinates and corresponding parametric models are generated. The projectors are then operated in accordance with geometric calibration data generated from validation and correction of the fiducial coordinates.

Abstract: The present invention relates to projection systems where multiple projectors are utilized to create respective complementary portions of a projected image. The present invention also relates to methods of calibrating and operating individual image projectors. According to one embodiment of the present invention, an attenuation map is generated for the projectors and pixel intensity values are established for the projectors by applying one or more intensity transfer functions to the attenuation maps. The intensity transfer functions are configured to at least partially account for the non-linear response of the output intensity of the projectors, as a function of an input intensity control signal applied to the projectors. Additional embodiments are disclosed and claimed.

Abstract: A method of calibrating a multi-projector image display system is provided. According to the method, non-parametric calibration data for the display system is recovered and used to generate a non-parametric model of the display system. Local parametric models relating to the display surface of the projection screen are generated and are compared with data points defined by the non-parametric calibration data to identify one or more local errors in the non-parametric calibration data. The local errors in the non-parametric calibration data are converted to data points defined at least in part by the local parametric models and the projectors are operated to project an image on the image projection screen by utilizing a hybrid calibration model comprising data points taken from the non-parametric model and data points taken from one or more local parametric models. Additional embodiments are disclosed and claimed.

Abstract: A method of calibrating a multi-projector image display system is provided. According to the method, non-parametric calibration data for the display system is recovered and used to generate a non-parametric model of the display system. Local parametric models relating to the display surface of the projection screen are generated and are compared with data points defined by the non-parametric calibration data to identify one or more local errors in the non-parametric calibration data. The local errors in the non-parametric calibration data are converted to data points defined at least in part by the local parametric models and the projectors are operated to project an image on the image projection screen by utilizing a hybrid calibration model comprising data points taken from the non-parametric model and data points taken from one or more local parametric models. Additional embodiments are disclosed and claimed.

Abstract: The present invention relates to projection systems. According to one embodiment the system comprises one or more projectors oriented to project an image on a projection screen and one or more image sensors oriented to acquire an image projected on the projection screen. The projector is operated to project a calibration image comprising one or more image fiducials on the image projection screen. The image sensor acquires the projected calibration image including the image fiducials. The respective positions of the image fiducials are identified and the identified fiducial positions are validated by applying a parametric model to compare respective ones of the identified fiducial positions with corresponding approximations of the identified fiducial positions. Corrected fiducial positions are generated when a result of one of the comparisons exceeds an error threshold. Additional embodiments are disclosed and claimed.

Abstract: The present invention relates to projection systems where one or more projectors are utilized to project a video, a still image, or combinations thereof. More particularly, the present invention relates to methods of calibrating and operating such systems. According to one embodiment of the present invention, a method of operating an image display system is provided. According to the method, one or more image sensors acquire respective overlapping portions I1, I2 of a projected image. Screen position coordinates for image fiducials in the first and second portions I1, I2 of the projected image are identified and used to establish first and second sets of distance metrics D1, D2 for the first and second portions of the projected image. A global point set is constructed from the first and second sets of distance metrics D1, D2. Global points within a region where the first and second portions I1, I2 of the projected image overlap are derived from only one of the first and second sets of distance metrics D1, D2.

Abstract: Particular embodiments relate generally to display systems and, more particularly, to display systems and methods for blending multiple images. A display system may include a first display source configured to generate a first image comprising illuminated points on a display surface, and a measurement device configured to measure an output energy value of the first image at output wavelengths for input values provided to the first display source. A normalized response function of the first display source corresponding to the measured output energy values for each output wavelength may be generated. A first response function that includes one or more of the normalized response functions of the first display source may be generated to derive corrected image input values corresponding to a desired output energy value at one or more illuminated points. The first display source may be controlled by applying the corrected input values.

Abstract: A display system includes a first and second display source configured to generate first and second images that overlap to form a multiple-display image. Each illuminated point within an overlap region includes a first image pixel contribution generated by the first display source and a second image pixel contribution generated by the second display source. The display system is programmed to select one or more dithering pixels within the overlap region and apply a blending function that alters one or more radiometric parameters of pixels within the overlap region. The blending function includes a deterministic blending function that alters contribution of non-dithering pixels based at least in part on the location of the non-dithering pixel within the overlap region. The blending function also includes a dithering component that alters contributions of dithering pixels within the overlap region of multiple-display image based at least in part on a modification value X.

Abstract: The present invention relates to ultra-resolution displays and methods for their operation. According to one embodiment of the present invention, an ultra-resolution display is provided where a common display screen is displaced from an array of display devices such that native frustums of respective ones of the display devices are expanded to define modified frustums that overlap on the common display screen. An image processor is programmed to execute an image blending algorithm that is configured to generate a blended image on the common display screen by altering input signals directed to one or more of the display devices. In this manner, the system can be operated to render an output image that is composed of pixels collectively rendered from the plural display devices. As a result, the resolution of the rendered video can exceed the video resolution that would be available from a single display.

Abstract: The present invention relates to projection systems where one or more projectors are utilized to project a video, a still image, or combinations thereof. More particularly, the present invention relates to methods of calibrating and operating such systems. According to one embodiment of the present invention, a method of calibrating an image display system is provided. The system comprises one or more projectors oriented to project an image on a projection screen and one or more image sensors oriented to acquire an image projected on the projection screen. According to the method, one or more image fiducials are projected on the image projection screen. Approximate three-dimensional position coordinates of the respective image fiducials as projected on the projection screen are identified by applying one or more three-dimensional mapping functions.

Abstract: A technique and system for detecting a radiometric variation/artifacts of a front-projected dynamic display region under observation by at least one camera. The display is comprised of one or more images projected from one or more of a plurality of projectors; the system is preferably calibrated by using a projective relationship. A predicted image of the display region by the camera is constructed using frame-buffer information from each projector contributing to the display, which has been geometrically transformed for the camera and its relative image intensity adjusted. A detectable difference between a predicted image and the display region under observation causes corrective adjustment of the image being projected from at least one projector.