[Blog Post] MSI at last!

[oshfdk]

Edit2: On f17r, the code shows much less of the marginalia than the image Lisa provided though.

I noticed that as well. I can think of several possible explanations, without further tests I have no opinion on their relative probability.

- Large blobs of paint on the page affecting the photography via exposure correction/secondary reflection/glow. E.g., there is paint on 17r, while it's absent on 116v and 1r (discounting weirdos). The presence of paint in other areas of the page should not affect the application of the weights, since the weights are applied uniformly. But if at any stage the local spectra were affected by the overall brightness/color of the page, this would change the levels in TIFFs and can boost the background signal. It should be possible to use color charts (or whatever these things lying next to MS are called) to check this, I think, but I have no idea how they work exactly.

- The way vellum was treated or sourced differs, so it has slightly different color overall. If this is the case, training the model on other pages might help. Maybe it's even possible to tell apart different batches of vellum used. Given we have folio 8 in MSIs, maybe we can try comparing it with 1r.

- The composition (or decomposition) of the ink differs.

- Random chance, the background/ink profiles on 1r and 116v just happen to be compatible (this one we can rule out or confirm after processing large enough number of pages).