Photogrammetry Photogrammetry Photogrammetry is the science of making measurements from photographs. This technology is appropriate when measuring an object directly is too time consuming, when the object is too large or too small to measure directly and when harsh environmental conditions prevent direct measurement.
Areas serviced include archaeological, architectural, forensic and industrial.
With several pictures of the same object taken from different locations, the intersections of light rays from the various camera stations intersect at only one point. With selective placement of the camera stations, adequate lighting and some minimal knowledge of the size of the object being photographed, a 3D full-scale math model of the object is generated and can be output to almost any CAD format. This photogrammetric process utilizes the statistical strength of a least squares algorithm to minimize the sum of the squares of the errors. This provides for high accuracy measurements when field and photographic processes are done with care. A quality 35mm SLR camera has been calibrated to strengthen the results and increase the accuracy of the models developed for measuring.