f17r

[Jorge_Stolfi]

Not sure if it's been mentioned before, but is this a trick of the vellum/scan, or might there be the same "legs" on "o" in You are not allowed to view links. Register or Login to view. and 116v ?

These are clips from the multispectral image set (UV 350 nm) with practically no processing
     
   
   
They have about twice the resolution of the BL 2014 color scans, without the JPEG artifacts.

The whole set of clips of that marginal writing is in
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Yoy will need to rescale the pixel intensity values from ~0..2000 to 0..65535 in order to see anything.

The graininess is mostly due to the rough texture of the vellum surface and the slanted illumination (tilted about 45 deg northwards or southwards from vertical).  That makes each little bump or dimple brighter on the light-facing side than on the more shaded side.

Of the three images with same wavelengths, one was taken with light from N, one with light from S, and one with both lights on.  You may be able to process each trio to remove some of the graininess from the relief, enhancing the true colors of the vellum and ink.

All the best, --stolfi