January 20th Toolkit: Technical Workshop 2: Image Based Approaches…

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      gabriellem

      Presenters: Carla Schroer and Marlin Lum, Cultural Heritage Imaging, San Francisco, CA
      Cultural Heritage Imaging | carla@c-h-i.org | marlin@c-h-i.org

      Connect with Cultural Heritage Imaging:
      Facebook | Flickr | Vimeo | Blog

      Cultural Heritage Imaging’s free Capture Guide and videos (including RTIViewer, RTIBuilder, and order an RTI Kit)
      Check out their Forum page!

      Imaging 3D Objects and Sites

      Stitched images: Combining multiple photographic images with overlapping fields of view to produce a panorama or a high-resolution image
      – Advantages: Inexpensive; many available software tools; can convey more information than single photos
      – Disadvantages: Distortion and perspective issues; no geometry; no measurement; some formats are proprietary

      Examples:
      – Panorama | Golden Gate Bridge
      360-degree product view with B&H Photo

      Reflectance Transformation Imaging (RTI): Using a fixed camera position, takes multiple images illuminated from different known light positions and are synthesized into a single RTI image

      Can be relatively inexpensive, done with a camera and a tripod (watch video example below)

      Examples:
      Egyptian scarab, Eton College Myers Collection
      Performing Reflectance Transformation Imaging, CHI Imaging (Video)

      Photogrammetry: Create a 3D digital surface that replicates the actual subject as closely as possible, in shape and color

      CHI Photogrammetry – This page has links to material, and instructional videos.

      Examples:
      SketchFab provides many examples of what photogrammetry looks like
      – Global Digital Heritage’s use of photogrammetry with the Sharjah Archaeology Authority

      Agisoft Metashape (Recommended)

      Scientific imaging and long-term preservation

      CHI Digital Lab Notebook
      Software available through link above, collect and manage data about digital representation processes (capture setup, location, stakeholders, documents, image sequence capture, processing, preparation of data for archive, etc.)

      Things to consider: What is necessary for your organization? What are the goals of the museum and how do these tools align with the values and interests of the organization? Is the organization able to invest time and even resources into projects like this?

      • This topic was modified 8 months ago by gabriellem.
      • This topic was modified 8 months ago by gabriellem.
      • This topic was modified 8 months ago by gabriellem.
      • This topic was modified 8 months ago by gabriellem.
      • This topic was modified 8 months ago by gabriellem.
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