Herbarium Collections Catalog

UNIVERSITY OF FLORIDA HERBARIUM
COLLECTIONS CATALOG

DIGITAL IMAGING
[Florida Museum of Natural History]


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[University of Florida Herbarium]

The digital images available in the Florida Museum of Natural History / University of Florida Herbarium Collections Catalog and Type Specimens Web sites are prepared using several types of scanners and digital cameras. This work is facilitated by our collaboration with and funding from many organizations and individuals. Our earliest efforts were supported by the University of Florida Libraries Digital Library Center and the Florida Center for Library Automation (FCLA). We are dearly indebted to the personnel at the Digital Library Center and FCLA for the ground-breaking efforts. Specific personnel involved with the imaging are listed in the contacts and credits sections of these web sites.

Summary lists and a search form for available specimen images are linked on the Digital Imaging Projects web page. Complete listings include those arranged by species, family/species, Englerian phylogeny and herbarium specimen accession number. Project listings highlight a few selected categories of plants. These are: Introduced Florida Plant Species, Potentially Poisonous Florida Plant Species, UF Herbarium Type Specimens, Insectivorous Florida Plant Species, John Bartram's Botany: St. Augustine to Picolata and Floristic Inventory of Kanapaha Botanical Gardens project specimens.

Image file names are based on the accession number of the herbarium specimen. The system used for naming the files is detailed in the Management Notes section of the Type Specimens site.

Image files are served on our site via the Zoomify® viewer utilizing XML and Java script, or an alternate Zoomify® Adobe Flash viewer. Jpeg files are available, upon request, for non-commercial use. Original images may also be available, for a fee, for commercial use.

The majority of our new images are prepared with a TTI-Repro-Graphic Workstation 3040 with a Digiflex 67ei Sinar 75H camera back and a Sinar Evolution 75H Multi Shots Digital Back System (33MP). These images are distinguished by the ruler and color charts present on the left side of the sheets. We estimate the image resolution to be ca. 440 ppi. Detailed specifications are as follows:

  • Workstation: 25x32x24 High, worktable. 60 Column height; Motorized Camera elevation with variable speed remote control, lead screw driven; Digital counter and camera mount. Camera: TTI Digiflex 67ei Modified to incorporate Sinar CMV Lenses with electronic shutter for live preview and media positioning. Precision hi resolution lead screw focusing. Interface mounting plate for the 75H digital camera back. Lighting: Quartz halogen TTI DL-400 day light color temperature 5500 Kelvin (8) lamp system, 4 lamps per side with integral dichroic reflector and forced air cooling; TTI new lighting mounting system, which telescope IN/OUT, UP/DOWN and Angular Pivoting, all with Engraved Markings for repetable set-ups and additional flexibility. TTI will supply a shadoless diffusion system for intricate specimens ligting. Lights turn On/Off via footswitch. Voltage Stabilizer supplied by TTI will maintain light color temperature & light level consistent during captures. Foot Print: 89W X 35D X 96 H; Electrical: Dedicated line 120VAC 50/60Hz-20 Amps Circuit Breaker.
  • Camera: Sinar Evolution 75H Multi Shots Digital Back System including 33MP Digital Back, 95MB RGB 24 BIT TIFF,190MB RGB 48 BIT TIFF file in one or four shots mode. Files can be scaled up through Sinar Capture Shop software to 244MB RGB 24 BIT TIFF and to 488MB RGB 48 BIT without loss of details. Live video and focus, 90mm Sinaron Digital CMV Lens.

The earliest images on our site (circa 2000-2006) were prepared by the staff of the George A. Smathers Libraries Digital Library Center. Despite being created in the early 2000's, these images are among the highest resolution on our site. They also took an average of 20 minutes each to acquire with the "top-of-the-line" hardware. They may be recognized by the presence of a small white 5 cm. ruler and no color chart. They were acquired using a ZBE Satellite large format stationary camera equipped with a PowerPhase ARI cameraback, 135mm Rodenstock lens and daylight filter. A Macintosh (PowerMac G4) computer system with 17 gigabytes of storage and ~ 800 megabytes of active memory was used for processing. The camera images were matched with a 1.8 gamma monitor, relative colorimetrics and the "BEST" quality for rendering profiles. Colorimetrics were calibrated using a Kodak Q-60R1 target per ANSI IT8.7/2-1993(1999:04). Intermediate processing was achieved with Adobe Photoshop 5.0. The final archives were recorded on CD's with accessible images made available on the Internet via the Lizardtech viewing source Mr. SID. from the Florida Center for Library Automation web server. All of those original images have subsequently been moved to the FLMNH server. Here are specifications as provided by the DLC:

  • Every effort has been made to preserve images as accurately as the original. Specimens are photographed at a 1:1 ratio, meaning camera height, DPI (ppi), and output image are all consistent with the original. This means that an 11.5 x 17.5 in. specimen sheet is actually preserved as an 11.5 x 17.5 in. final image. A measurement scale has been included in the images as a reference. In most cases post-production manipulation is unnecessary, but occasionally (usually those with several centimeters of depth of field) it is necessary to use the sharpening and brightness/contrast filters in Adobe Photoshop 5.0.
  • Digital files are acquired using Phase-One camera software with a gray balanced standard film curve and ISO sensitivity of 400. Specimens are initially recorded as Macintosh (3 vector) images with final format being TIFF files with color depth at 24/16 millions of colors. Generally entire sheet specimens can take anywhere from 5 to 10 minutes (in some cases up to 25 min.) to acquire, have an average of 450 DPI (ppi), and file sizes around 140 megabytes. Close-up's can take anywhere from 45 seconds to 5 minutes and may exceed 3500 DPI (ppi), and can range from 500 bytes to 80 megabytes in size.

Staff and volunteers in the University of Florida Herbarium also acquired images of selected specimens on a flatbed scanner, Microtek Scanmaker 9600XL. Those specimens were scanned at 400 ppi and saved in tif format (.tif). These images may be recognized by the presence of a small white 6 in./15 cm. ruler and no color chart. Most of the specimens available in the Floristic Inventory of Kanapaha Botanical Gardens project are prepared by this method.

Digital images of plant materials taken with consumer model digital cameras prior to pressing are being added to compliment the specimens. Most of these images are prepared and posted in jpeg (.jpg) format.


[University of Florida Herbarium]
University of Florida Herbarium collections:
Vascular Plants | Herbarium Library
Bryophyte and Lichens | Mycological
Wood | Paleobotany (affiliated collection)
[Florida Museum of Natural History]

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Last content update: 22 October 2013
Edited by: Kent D. Perkins
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