Quality assessment of digitized aerial photographs

O. Koelbl

doi:10.1117/12.324104

7 September 1998 Quality assessment of digitized aerial photographs

O. Koelbl

Proceedings Volume 3409, Electronic Imaging: Processing, Printing, and Publishing in Color; (1998) https://doi.org/10.1117/12.324104
Event: SYBEN-Broadband European Networks and Electronic Image Capture and Publishing, 1998, Zurich, Switzerland

Abstract

Manufacturer of photogrammetric instruments have developed specific scanners for aerial photographs, in parallel to printing industry. Main objective of this specific scanners is to guarantee a high geometric precision of plus or minus 0.001 to 0.002 mm for a standard format of original film documents of 23 X 23 cm and to scope with the high image resolution of the original images. Within a study of OEEPE (European Organisation for Experimental Photogrammetric Research) the most important photogrammetric scanners used in practice have been tested. Standard procedures are in development to analyze the dynamic range of the scanners, the image noise, the image sharpness and the color fidelity. Practical all photogrammetric scanners are based on CCD technology. The article presents the techniques applied for the testing of the scanners concerning the determination of the MTF of the scanners, the image noise, the dynamic range and the color fidelity and gives typical results for various scanners. The scanners tested are manufactured by Intergraph, Zeiss, Agfa, Helava and Wehrli.

Citation Download Citation

O. Koelbl "Quality assessment of digitized aerial photographs", Proc. SPIE 3409, Electronic Imaging: Processing, Printing, and Publishing in Color, (7 September 1998); https://doi.org/10.1117/12.324104

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KEYWORDS

Scanners

Photography

Transparency

Modulation transfer functions

Image resolution

Image processing

Optical filters

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