Scanning
Kucera has been performing photogrammetric scanning of aerial film in-house since 1995 and currently scans tens of thousands of aerial exposures annually at resolutions up to 3600 dpi on a top-rated Z/I Imaging PhotoScan 2000 automated photogrammetric scanner.
The film is scanned directly through the storage area network using a Quality of Service (QOS) networking protocol set to ensure priority of the scanning data over other network traffic. Scanning through the network instead of a hard drive provides more redundancy and stability as well as greater speed.
Interior orientation parameters of each scanned exposure are automatically computed during the scanning using the PhotoScan's IO utility and saved for quality control and subsequently photogrammetric processes. Geometric stage, geometric camera, and radiometric calibration of the PhotoScan system is performed weekly and the system calibration is reviewed daily before starting the scanning work.
Kucera's PhotoScan system is housed in a fully enclosed, environmentally controlled "clean room" type area to ensure optimal performance and prevent dust contamination of the film surface. Prior to scanning, the film is run through a dedicated film cleaning device and brushed with static brushes to remove foreign surface particles.