A method of making stereophotographic documentation and photogrammetric of impressions or of models of jaws, in which the impression or the model of a jaw is placed on a reference object, which in its turn is placed on a bottom plate in a photo device. The photo device includes camera mounted in a frame at a distance from the bottom plate and a light source for illuminating the impression or model on the reference object. A picture of the impression or the model of a jaw is taken by means of the...

A slide mechanism for use in transporting a stereoscope along a horizontal support arm of a photogrammetric instrument includes a member slidably mounted to a pair of support tracks cantilevered to the support arm. A clamping mechanism is used to lock the slide member in a first predetermined position on the support tracks and is unlockable to enable the slide mechanism to be moved along the support tracks to a second position.

A sensor device of the type to be carried on aircraft or spacecraft which avel along an arbitrary flight path, operates to provide data corresponding to the course and orientation of the craft, and a digital display of the terrain over which the craft is traveling. The device includes at least first, second and third sensor lines comprising rows of photosensitive semiconductor elements, arranged transversely of the flight path in an image plane. Each of the sensor lines provides line images corr...

A computer-assisted technique for providing approximate solutions to photogrammetric problems in interactive applications computes an approximate solution to a large, non-linear system by converting the non-linear system into a smaller, linear system where only a subset of the system's parameters are used. The size of the smaller system can be adjusted to different system capabilities and/or model complexities to ensure computation of an approximate solution in a given time. For use in an intera...

A high visibility panel for use with aerial mapping and aerial surveying is constructed of lightweight corrugated cardboard. Two sections, each having a reflection side and a deflection side, are used. The panel sections are folded alternately into an accordion pleat into short segments along the entire length of each of the panel sections. The panel sections can be installed with either face toward the sky, depending upon the ground conditions on which they are installed. The panel sections are...

An arrangement for producing photographs which may be used for photogrammetric surveys of spatial objects, in which control points are established in the spatial object. Two photographs are taken using central projections with different positions of the projection center. The control points are the component of a mobile control point system having a reference with four points with known position coordinates constituting a quadrangle. At least two space points located outside the reference plane,...

Methods, systems and computer program products are provided for determining an obscured contact point based on a visible portion of an acoustic sensor of a medical device contacting a patient by acquiring a first image containing an upper surface of the acoustic sensor from a first viewpoint and a second image containing the upper surface of the acoustic sensor from a second viewpoint different from the first viewpoint. The acoustic sensor is located in the first image and the second image and t...

The invention relates to a method for a non-retarded shutter release of a rotary sector shutter, particularly for use in photogrammetrical aerial cameras comprising a computer means which via a control means for rotating the rotary sectors of the shutter sets the latter to a rate of rotations in a manner that the time of photograph sequence is a multiple integer of the time interval between two feasible open times of the shutter. Probable incorrect exposures are eliminated by a variation of the ...

For an automatic detection of the 3D shape of objects by photogrammetry, the background of the photogrammetric point markers is characterized by area markers which comprise a plurality of point markers and have a characteristic optical configuration that is expressed, e.g., in the color, shape, texture, or gray level of the surface area of the area marker. During the image processing of the photogrammetric images taken of an object, first the area markers and then the point markers present in th...

A camera is used in a photogrammetric analytical measurement, and has a distance-measuring sensor unit for measuring a vertical distance between the camera and a sloping surface of the ground and a minimum distance between the camera and the sloping surface of the ground when the camera is placed above the sloping surface of the ground. The camera has a memory medium for storing the vertical distance and the minimum distance as vertical distance data and minimum distance data, respectively.