f116v squiggle from the multispectral images

[oshfdk]

Oshfdk, would it be possible to bring out the pen lines on a regular page in a similar way? It would be extremely handy to run a python code and get black and white outlines of whatever pen work is detected. Also for the outlines of the images etc.

I have experimented a bit with training a model on visible light scans using point sets taken from MSIs (trying to restore from visible scans as much information available on MSIs as possible). Tentatively, this produces a model that is not bad at separating different layers on the existing high resolution scans. There are two caveats though: resolution will suffer somewhat, since it takes a group of pixels (2x2 or 3x3) to have enough statistical data for more or less satisfactory separation and the separation is not linear, meaning the process will be much more computationally demanding, it's no longer just about summing a bunch of layers with weights. This probably won't work on JPEGs, only on the original TIFFS, because the compression of TIFFs into JPEGs works by removing exactly the extra information the model uses. The algorithm will still treat each small area of 2x2 or 3x3 pixels separately from the rest of the page, so there is some confidence that it won't hallucinate things that are not there.

Maybe if I stumble upon a model that works reasonably well, I will just generate separate sets of layer images for each page and share them.