Photogrammetric Methods
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Photogrammetric Cameras
requires powerful and robust image calibration and orientation. Figure 6 shows an example of an accident scene and a subsequent scene reconstruction processed by the iWitness (Photometrix) software package. Dynamic Surface Reconstruction Figure 7 shows the results of a dynamic deformation analysis of a car body part. The scene has been recorded by two high-speed cameras with a frame rate of 1,000 Hz. The object surface has been prepared by an artificial pattern in order to provide sufficient image texture for matching. In each epoch the surface is reconstructed by stereocorrelation following physical surface points through the image sequence. Medical 3-D Navigation Figure 8 displays a stereocamera system based on two video cameras (AXIOS 3D Services) that is used in medical applications for the measurement of the body and navigation of tools for computer assisted surgery. Usually this kind of system guides the surgeon for precise handling of surgical tools with respect to other tools, or part of the human body. The typical accuracy ranges from 3 mm down to 0.3 mm in a 1 m3 measurement volume.
6. Madani, M.: Photogrammetric applications. In: McGlone (ed.) Manual of Photogrammetry, 5th edn., pp. 1015–1104. American Society for Photogrammetry and Remote Sensing, Bethesda, Maryland (2004)> 7. ISPRS Commission V Close-Range Sensing: Analysis and Applications. http://www.commission5.isprs.org/. Accessed 20 Aug 2007
Photogrammetric Cameras Photogrammetric Sensors
Photogrammetric Images Photogrammetric Sensors
Photogrammetric Methods1 O LAF H ELLWICH Computer Vision and Remote Sensing, Berlin University of Technology, Berlin, Germany
Future Directions
Synonyms
Photogrammetry serves as a flexible measurement tool in many different application fields. For both major areas, namely geotechnology and close-range applications, significant market growing rates of 15% per year and more have been predicted. It is therefore obvious that photogrammetry and 3-D image processing are fundamental upcoming technologies for a broad variety of applications.
Camera model; Sensor orientation; Object reconstruction; Methods of photogrammetry; Single image; Image pair; Image triplet; Multiple-image bundle block; Bundle adjustment; Central projection; Central perspective; Fundamental matrix
Cross References Photogrammetric Products Photogrammetric Sensors Visualizing Constraint Data
Recommended Reading 1. Atkinson, K.B. (ed.): Close Range Photogrammetry And Machine Vision. Whittles, Caithness, UK (1996) 2. Fryer, J.G., Mitchell, H.L., Chandler, J.H.: Applications of 3D Measurement From Images. Whittles, Caithness, UK (2006) 3. Karara, H.M. (ed.): Non-Topographic Photogrammetry. 2nd edn. American Society for Photogrammetry and Remote Sensing. Falls Church, Virginia (1989) 4. Luhmann, T. (ed.): Nahbereichsphotogrammetrie in der Praxis. Wichmann, Heidelberg (2002) 5. Luhmann, T., Robson, S., Kyle, S., Harley, I.: Close-Range Photogrammetry. Whittles, Caithness, UK (2006)
Definition The classical task of
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