A target, which is photographed with an object at a spot for a photogrammtric analytical measurement, comprises first, second, third standard point members and assistant point members. The standard point members and the assistant point members are covered by a reflecting sheet. A distance between the first and second standard point members equals a distance between the second and third standard point members. Two assistant point members are positioned on a first straight line connecting the firs...

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, calculating valid mapping ranges for the pairs 1 to 4, and displaying the valid mapping ranges on the drawing area. When an arbitrary point is designated using a cursor in the drawing area, paired images corresponding to one of the valid mapping range...

A photogrammetric process for the three-dimensional monitoring of moving objects can utilize at least two cameras and a triangulation system for detecting the position and orientation of the object. The object is additionally illuminated, e.g. by a flash lamp or a triggered laser to eliminate the influence of ambient light.

A stylus is briefly placed on the surface coating of photographs for forming an artificial marking symbol on the coating. The stylus oscillates in the ultrasonic frequency range. Part of the oscillation energy of the stylus is converted into frictional heat producing a marking symbol in the coating in the form of a high contrast annular bead. The apparatus comprises a stylus, a mechanical lowering device, an electroacoustic transducer for producing the ultrasonic oscillations of the stylus, and ...

A first and a second, distinguishable set of images are projected onto a surface, each image having a corresponding source element with known two-dimensional coordinates relative to the projector. A pose is determined of spaced two cameras in position to image at least a portion of the surface. The three-dimensional coordinates of at least some of the first set of images are determined with the cameras, from which are calculated an initial pose of the projector. Each of the at least some of the ...

In an image processing computer system for a photogrammetric analytical measurement in which a survey map is formed by successively connecting survey map sections to each other, each survey map section is produced based on a set of pictures photographed for the measurement. Plural frames of image data are read from a memory in a predetermined order. A monitor displays a scene including a first display area and a second display area. Respective plural pictures are displayed on first display area ...

A multi-stage focus box camera is disclosed which comprises a tubular body open at both ends formed of a dimensionally stable, light weight material. A lens board and lens extender assembly slides over one end of the camera body and is adapted for slidingly carrying a lens mount for a lens. A film board fits over the opposite end of the camera body and is adapted to receive a film holder which closes the back side of the body and which defines a film support for sheet film. In addition the film ...

In an image processing computer system for a photogrammetric analytical measurement, a picture has an image of a target with three main reference point areas and an assistant reference point area. Positions of the reference point areas are determined by a two-dimensional picture coordinate system defined on the target. Positions of the main reference point areas are calculated with a three-dimensional camera coordinate system defined on a camera. Positions of the main reference point areas are c...

A photogrammetric plotter having a photocarriage which is supported on a trolley carried by a first set of way bars which in turn are supported from the trolley element on a second set of way bars mounted on a base for viewing by binocular optical system of a pair of stereo photos on a pair of photo carriers on the photocarriage. A constraint free drive apparatus is provided for driving the photocarriage along each of the set of way bars each of constraint free drive apparatus including a drive ...

In the automatic photogrammetric 3D digitization of a body or body part marked e.g. by an envelope provided with photogrammetric target markers, the camera employed for image recording has additional light pattern projectors added thereon which are fastened to the camera body and project geometrically simple structures such as points or lines onto the body. These structures, which are visible optically without the viewing image, facilitate the manual alignment of the camera and the positioning o...