Hochauflösende Kameraeinrichtung optimiert für dreidimensionale Makroobjekte (Flechten)

Workstation with high resolution camera for digitalisation of mycological/ lichenological macroobjects

Camera hardware

• Phase One 645DF medium format camera
• Phase One IQ160 digital back (until December 2011)
• Phase One IQ180 digital back (since January 2012)
• Schneider-Kreuznach LS 80 mm f/2.8 leaf shutter lens
• FireWire IEEE-1394 serial bus cable (will be replaced with faster USB 3.0 cable when supported by firmware)

Lighting

• 1 x CN-126 LED Video Lighting (5400 K, 650 lx, diffusor filter)
• 2 x LED-5001 Video Light (5500 K, 700 lx, diffusor filter)

Digitization workstation - computer hardware and software

Hardware:

• Intel Core i7-870 CPU (8M Cache, 2.93 GHz)
• 8 GB RAM
• 2 x Western Digital WD5002ABYS-02B1B0 (500 GB, SATA2) RAID 0 HDD
• NVIDIA Quadro 2000 graphics card (1 GB DDR5 frame buffer)
• QUATO Intelli Proof 242 ex 24" proof monitor
• Handheld barcode scanner (USB)

Software:

• Windows 7 Ultimate 64 Bit
• Capture One (Phase One) RAW converter and image editing software

Digitizing server infrastructure

Storage server for images, image web publication server, web server, database server - at the SNSB IT Center

Digitizing workflow

• Herbarium sheets and accompanying drawings (if present) are photographed
• Internal accession numbers (barcodes) are scanned via hand-held scanner and automatically set as filenames
• Lens correction filters are applied
• Brightness, contrast, tonal values are adjusted
• Images are flipped to portrait format and edges are cropped (if necessary)
• Images are automatically saved as compressed (lossless) RAW files (EIP)
• RAW files are exported as TIFF (uncompressed, Adobe RGB 1998, 1200 px/in)
• TIFF image files will be processed, provided and archived:
  • an image copy converted to JPG and less resolution will be made and provided on the image web publication server, suitable for web usage
  • a link to this image will be placed in the corresponding data record of DiversityCollection
  • the original image will be archived on local data storage and furthermore as long-term preservation at the Leibniz Rechenzentrum München
• The whole procedure takes between 2,5 and 8 minutes, the average is about 4 minutes. Capture of metadata in DiversityCollection takes about 5 minutes.

Contact person(s)

Sebastian Werner

Dr. Konstanze Bensch

Notes

Digitization station optimized according to JSTOR Plant Science recommendations.

JSTOR Plant Science: An Introduction - Video 2010