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.

Abstract: A technique, and associated system and computer executable program code on a computer readable storage medium, for automatically correcting distortion of a front-projected display under observation by at least one camera. The technique may be employed in a myriad of front-projected display environments, e.g., single or multiple projectors and cameras are used.

Abstract: A technique, and associated system and computer executable program code on a computer readable storage medium, for automatically correcting distortion of a front-projected display under observation by at least one camera. The technique may be employed in a myriad of front-projected display environments, e.g., single or multiple projectors and cameras are used.

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.

Abstract: An apparatus, in combination with a conventional electrically powered hand or rider lawn mower, which provides a detachable electrical power source for such lawn mowers and one or more auxiliary electrical hand tools. The apparatus has an electrical generator powered by a gasoline engine and a control box all of which are mounted by support elements on a rectangular shaped tubular frame. The tubular frame is attached by four or more retention clips to the protective shroud of a hand lawn mower or the rear deck of a rider lawn mower. The control box has two or more a.c. electrical outlets which can be used to feed electrical current to the lawn mower and/or auxiliary electrical hand tools such as weed eaters, blowers, hedge clippers or edgers. In an alternative mode, the apparatus can be temporarily removed from the lawn mowers for use with a Recreational Vehicle, a lighting system or outdoor pump.