Abstract: A system and method of providing composite real-time dynamic imagery of a medical procedure site from multiple modalities which continuously and immediately depicts the current state and condition of the medical procedure site synchronously with respect to each modality and without undue latency is disclosed. The composite real-time dynamic imagery may be provided by spatially registering multiple real-time dynamic video streams from the multiple modalities to each other. Spatially registering the multiple real-time dynamic video streams to each other may provide a continuous and immediate depiction of the medical procedure site with an unobstructed and detailed view of a region of interest at the medical procedure site at multiple depths.

Abstract: An apparatus for optically analyzing a substrate. The apparatus includes: (a) a light source for directing light onto the substrate; (b) optics for creating an optical path from light reflected from the substrate; and (c) a multiple wavelength imaging optical subsystem positioned in the optical path. The multiple wavelength imaging optical subsystem includes: (i) one or more filters which are capable of one or both of: (1) being alternatively or sequentially interposed in the optical path to extract one or more of wavelengths or wavelength bands of interest; or (2) having their wavelength selectivity adjusted to extract one or more wavelengths or wavelength bands of interest; and (ii) one or more imaging devices positioned to image the extracted wavelengths or wavelength bands of interest from the one or more filters; (d) an imaging device positioned in the optical path. Also a method is included, making use of the apparatus for analysis of a substrate.

Abstract: Methods and systems for dynamic virtual convergence (218) and a video see through head mountable display (200) that uses dynamic virtual convergence are disclosed. A dynamic virtual convergence algorithm (218) includes sampling an image with two cameras. The cameras each have a field of view that is larger than a field of view of displays used to display images sampled by the cameras (210). A heuristic is used to estimate the gaze distance of the viewer. The display frustums are transformed so that they converge at the estimated gaze distance. The images sampled by the cameras (210) are then reprojected into the transformed display frustums. The reprojected images are displayed to the user to simulate viewing of close range objects.

Abstract: A real-time structured light depth extraction system includes a projector for projecting structured light patterns onto an object of interest. A camera positioned off-axis from the projector samples light reflected from the object synchronously with the projection of structured light patterns and outputs digital signals indicative of the reflected light. An image processor/controller receives the digital signals from the camera and processes the digital signals to extract depth information of the object in real time.

Abstract: Systems, methods and computer program products which have the registration accuracy of vision-based tracking systems and the robustness of magnetic tracking systems. Video tracking of landmarks is utilized as the primary method for determining camera position and orientation but is enhanced by magnetic or other forms of physical tracking camera movement and orientation. A physical tracker narrows the landmark search area on images, speeding up the landmark search process. Information from the physical tracker may also be used to select one of several solutions of a non-linear equation resulting from the vision-based tracker. The physical tracker may also act as a primary tracker if the image analyzer cannot locate enough landmarks to provide proper registration, thus, avoiding complete loss of registration. Furthermore, if 1 or 2 landmarks (not enough for a unique solution) are detected, several may be utilized heuristic methods are used to minimize registration loss.