Abstract: A method and system for calibrating medical imaging devices is provided. The method includes generating a calibration image within an X-ray imaging system and determining an image distortion of the X-ray imaging system based upon the calibration image for calibrating the X-ray imaging system.

Abstract: A method for anticipation and tracking eye movement for head tracked projectors which divides a projection surface into spherical triangles and uses interpolating calibration values stored at each vertex of the triangle. A calibration map is used that contains information about the relationship between the user's head orientation and where they are looking with their eyes at each calibration point. The projection surface is divided into spherical triangles which are searched to find the triangle which contain the user's interpolated view point by performing a dot product test between the interpolated view point and the unit normal vectors inside the three planes that make up the sides of the spherical triangle extended back to the eye point. When a dot product test fails for any side of the triangle the pointer is followed to the adjacent triangle where the test starts over.

Abstract: A method and apparatus for providing an improved area of interest display system by providing a transition zone between a high resolution image being reflected onto and a low resolution image being projected onto a display screen. A combiner surface is provided in the form of a mirror having an all-reflective surface which transitions to an all-transmissive surface. The transition occurs in the form of pixels of highly reflective material which are disposed on the combiner surface using a dithering pattern generated from a modified error diffusion algorithm which minimizes undesired grouping of pixels.