Hochauflösende Kameraeinrichtung mit softwaregesteuert bewegbarem Tisch optimiert für dreidimensionale Makroobjekte (Kleinpilze) und hohe Schärfentiefe

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High-resolution camera system with software-controlled movable table optimized for three-dimensional macro objects (small mushrooms) and high depth of field

High Resolution Camera System Sample Scanner 2013-09-26.jpg High Resolution Camera System Example 2013-09-26.jpg

Camera hardware

  • DSLR: Nikon D2X (12.5 Megapixel)
  • Macro lens: Micro Nikkor 60 mm 1:2.8 D

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

Computer 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)

Electric sample table (XYZ-Sample-Scanner):

  • Software-controlled table (custom product by the Elektronikwerkstatt Universität Bayreut), automatically adjustable in three dimensions with micrometre precision by means of electrical stepping motors

Software:

  • Windows 7 Ultimate 64 Bit
  • Nikon Camera Control Pro 1.3.0
  • Elub 0781 2.1 control software (custom product by P. Reiss, Elektronikwerkstatt Universität Bayreuth)
  • PhotoAcute 3
  • Adobe Photoshop 12.0.4

Digitizing server infrastructure

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

Digitizing workflow

  • The object to be digitized is placed on the electric table
  • Up to 24 single photographs are automatically taken by the Elub 0781 software thereby slightly changing the focus settings after each shot according to predefined parameters
  • The single shots (RAW files) are further processed to one new image applying superresolution and focus stacking technologies provided by the Photo Acute software
  • The resulting artificial image contains only that parts of the underlying single shots, which are in focus (focus stacking), and its resolution is enhanced approximately fourfold (superresolution)
  • This final raw image file is colour-adjusted, cropped, and exported as TIFF in Photoshop
  • Single shot raw files, combined raw file, and TIFFs are stored at the Leibniz Rechenzentrum München

Contact person(s)

Sebastian Werner

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