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23 sty 2015 · As standard, we recommend scanning glass plate negatives at a minimum resolution of 600ppi, depending on the size of the original plate, to uncompressed TIFF format as a master file. Compressed lower resolution surrogate JPEG files can then be produced from these master TIFFs.
14 maj 2022 · Look at existing film carriers for your scanner for an idea of how far the image has to be from the scan bed. The space is needed because the scanner is focused slightly above the glass plate. Emulsion up won't work because the thickness of the glass will hold the image above the scanner's DOF.
In this article an Epson V700 scanner is used to scan the glass plates. This high-quality flatbed scanner has an optical resolution of 4800 dpi for reflective media (photos, documents) and 6400 dpi for transmissive media (film, glass).
24 lip 2008 · Larger plates could be copied with a digital camera, including a view camera with a Better Light scanning back ($12K to $20K). You could also make an positive on 4x5 inch (9x12cm) film. An high-resolution software solution would be to scan the plates in segments on the flatbed then stitch the results together using Photoshop or PTGui.
28 lip 2022 · If the copyright status of the glass plate negatives is uncertain, complete the following steps before proceeding to digitization: Assess the material for privacy and confidentiality concerns in accordance with Section D.2 of the Libraries’ Takedown Request Protocol .
17 sty 2018 · We capture glass plate negatives in 8bit monochrome, scanning in batches where appropriate. Batch scanning makes it possible for a good operator to run two scanners side-by-side. In doing so we can easily match or exceed a camera based workflow.
17 gru 2014 · The light is diffused by an opaline glass, positioned on the cardboard box, that carry the glass plate. The glass plate is photographed with my Canon 60D with a 70-300 mm tele, on a tripod. Shot: 1/500 s, f:5, manual focusing, 10 s delay.
