A method and apparatus for defining the location of a medical instrument relative to features of a medical workspace including a patient's body region are described. Pairs of two-dimensional images are obtained, preferably by means of two video cameras making images of the workspace along different sightlines which intersect. A fiducial structure is positioned in the workspace for defining a three dimensional coordinate framework, and a calibration image pair is made. The calibration image pair ...

Photogrammetric methods are provided for the preparation of anaglyphic orthophotographs in which first and second diapositives having overlapping image areas of at least 55 to 65 percent are positioned above a vertically adjustable plane in spaced apart relation and in a planar attitude corresponding to the attitude of the focal plane of the camera when taken. First and second coloured high intensity light beams are projected through the first and second diapositives, respectively, to generate f...

A method and apparatus for defining the location of a medical instrument relative to features of a medical workspace including a patient's body region are described. Pairs of two-dimensional images are obtained, preferably by means of two video cameras making images of the workspace along different sightlines which intersect. A fiducial structure is positioned in the workspace for defining a three dimensional coordinate framework, and a calibration image pair is made. The calibration image pair ...

A method and apparatus for defining the location of a medical instrument relative to features of a medical workspace including a patient's body region are described. Pairs of two-dimensional images are obtained, preferably by means of two video cameras making images of the workspace along different sightlines which intersect. A fiducial structure is positioned in the workspace for defining a three dimensional coordinate framework, and a calibration image pair is made. The calibration image pair ...

A photogrammetric image processing apparatus and method defining a plurality of pairs of images including a common target as belonging to the same groups (pairs), providing an image display area and drawing area on the screen of the display device, displaying images of a pair 1 on the image display area, calculating a valid mapping range for the pair 1, displaying an area marker showing the valid mapping range on the survey map superimposed in the drawing area, designating corresponding image po...

A method and apparatus for defining the location of a medical instrument relative to features of a medical workspace including a patient's body region are described. Pairs of two-dimensional images are obtained, preferably by means of two video cameras making images of the workspace along different sightlines which intersect. A fiducial structure is positioned in the workspace for defining a three dimensional coordinate framework, and a calibration image pair is made. The calibration image pair ...

A control unit box and one of standard point members are provided close to a connection of first and second bars. A standard plane is defined by the standard point members. A loop antenna is provided in a mount unit situated on the top surface of the control unit box. The box is positioned such that a ratio of a second distance to a first distance is less than tan 8.degree.. The first distance is from the point member to the mount unit, along the standard plane, and the second distance is from t...

A method and apparatus for defining the location of a medical instrument relative to features of a medical workspace including a patient's body region are described. Pairs of two-dimensional images are obtained, preferably by means of two video cameras making images of the workspace along different sightlines which intersect. A fiducial structure is positioned in the workspace for defining a three dimensional coordinate framework, and a calibration image pair is made. The calibration image pair ...

A method and apparatus for defining the location of a medical instrument relative to features of a medical workspace including a patient's body region are described. Pairs of two-dimensional images are obtained, preferably by means of two video cameras making images of the workspace along different sightlines which intersect. A fiducial structure is positioned in the workspace for defining a three dimensional coordinate framework, and a calibration image pair is made. The calibration image pair ...

A camera is used in a photogrammetric analytical measurement, performing photography at each photographing position, and has a relative-position-detecting system for three-dimensionally detecting a relative-positional relationship between different photographing positions. The relative-position-detecting system is associated with a three-dimensional coordinate system, defined in the camera, such that an origin of the three-dimensional coordinate system is situated at a back principal point of th...