Difference between revisions of "Digital Imaging"
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Revision as of 17:59, 10 November 2022
Contents
About
These links and documents contain information about best practices for digital imaging of specimens. Both 2D and 3D imaging can be very important to collections and achieved in a variety of ways. This page will house workflows and links to external resources on protocols and recommendations for imaging specimens of all kinds in 2D and 3D.
Contributors
Introduction
Specimen imaging is a way to augment specimen records. Quality digital images have a number of values including (but not limited to):
- improved discovery of specimens
- improved access to collection material
- potential research material
- dissemination to the public
Before undertaking a large amount of imaging there are several practical considerations to address. Firstly, digital image files can be very large and will need to be stored in a way that is safe and retrievable long term. There can be issues with file formats changing over time as well as storage mediums. No storage is free, and even if the image size is small, a large number of small images can need a large amount of storage. Secondly, a consistent naming format and way to link images back with the physical collections. If there is no way to go back to see what specimen an image belongs to it can be very problematic for research and use.
2D Imaging
Two-dimensional imaging, or 2D imaging, is what the majority of images generated are. This is often achieved with a camera, and can include techniques like focus stacking
Equipment
There is an wide range of photographic equipment available. Gear, particularly camera bodies, change rapidly. iDigBio has assembled a guide with equipment reccomendations7.
3D Imaging
Three-dimensional imaging is a less common and more expensive form of imaging and is often achieved by SEM, TEM, and laser scans.
Equipment
File Formats
Advocacy for Imaging
Images of specimens, and the process of imaging is something that has clear value to those work in collections. The process is also expensive and labor intensive, which can often require advocacy to achieve. Here are a list of references and resources related to the value of imaging collections.
- Sullivan, John P., The Value of Imaging Specimens in Ichthyology, 2016. [1]
Source Material
Links
1. Sullivan, J. P. 2016. The Value of Imaging Specimens in Ichthyology. iDigBio Vertebrate Digitization Workshop, Berkeley, CA, April 4 - 6, 2016
2. https://www.idigbio.org/wiki/index.php/Developing_Robust_Object_to_Image_to_Data_(DROID3)
3. www.idigbio.org/content/workflow-modules-and-task-lists
4. http://silurus.ansp.org/ACSI/corresp/digital_imaging_tips.html
5. https://vimeo.com/61663146
6. Sabaj Pérez, Mark H. "Photographic atlas of fishes of the Guiana Shield." Bulletin of the Biological Society of Washington 17.1 (2009): 52-59.
7.iDigBio 2014. iDigBio Imaging Equipment Recommendations https://www.idigbio.org/wiki/images
/8/86/IDigBioImagingGeneralEquipmentRecommendations1_0.pdf
8. Randall, Z. 2016. Imaging Systems: Light Box vs. Copy Stand vs. Squeeze Tank https://www.idigbio.org/wiki/images/0/00/IDigBio-Berkeley_USE.pdf
9. http://mcz.harvard.edu/Departments/Ichthyology/fish_imaging.html
