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DSW700 System Description
DSW700 Technical Details
Overview
Softcopy photogrammetry work, stereo-compilation, and ultimately, orthophotos can
only be as accurate as the source imagery. Working in a digital photogrammetry environment requires
that the scanned aerial photographs are not only as accurate as possible but that the appearance of
the film is reproduced faithfully and that the raw air photos are scanned quickly so that production can
begin rapidly.
The Leica DSW700 Digital Scanning W
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DSW700 System Description Hardware characteristics 1. Basic design The DSW700 has at its center an extremely rigid base plate, manufactured as a precision casting. This is supported on a frame, furnished with casters and stabilizers (leveling screws). On the base plate are mounted precision steel rails, which derive their flatness from the base surface together with a jack screw approach, which ensures straightness before the rails are screwed tight in their final positions. Both X and Y
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DSW700 System Description 6. Digital sensor and lens A large-format, 12-bit, CCD array sensor is fitted on the DSW700. It provides better performance than any previous model in terms of the area of the film that can be captured. Faster and larger sensors that are also lower in noise translate directly into speed and quality improvements. The new sensor also creates a cleaner, more consistent scan and allows future efforts to be redirected away from perfecting raw capture towards higher l
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DSW700 System Description Host computer and software 1. Host computer The DSW700 requires a host with dual processors running the Windows® XP Professional operating system. The requirement is: Workstation PC such as the HP XW8400 • Two Dual-Core Intel Xeon processors, 2.33 Ghz minimum • 4 GB RAM • 250 GB SATA hard drive (minimum) • DVD±RW drive recommended • Graphics card must be a PCIe graphics card with minimum resolution of 24-bit, 1152x900 and 256MB memory • Quality color display, capable
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DSW700 System Description time variable dark frame captures to determine a set of bias and gain adjustments. These adjustments are measured for every pixel in each color band to correct for variations in radiometric response over the entire sensor area, as well as discrepancies in time of exposure. The bias and gain adjustments are then saved in calibration files for later application to the image patches captured during digitization. 5. Photo/stage orientation (interior orientation) Thi
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DSW700 System Description General physical requirements Temperature The system should be installed in a normal, air-conditioned office environment. The operating temperature range is 21±2°C, but no equipment failures occur over the range 17-25°C. Humidity The operational relative humidity range is 40-70%. The maximum relative humidity is 90%. Vibration Externally induced floor vibrations must be less than 0.01g at all frequencies. Floor space and carrying capacity The equipment can be instal
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DSW700 System Description Dimensions • Size 1238 x 1003 x 1175 mm width x depth x height • Weight 288 kg (633 lb) Host computer • Workstation PC with two Dual-Core Intel Xeon processors, 2.33 GHz minimum processors • RAM 4 GB • 250 GB SATA Hard disk minimum • PCIe Graphics Card, 24-bit or 32-bit at 1152 x 900 resolution and 256 MB memory • DVD±RW drive recommended • Operating system Windows XP Professional, Service Pack 2 Scanning software • Calibration XY stage geometric, sensor geometric and
