[MEI-L] Tools/libraries to find staves in scanned sheet music

[Urs Liska]

Hi Thomas,

thanks for the pointer. If I'd be a Windows user I might download the
test version, but the other mentioned tools somehow seem to go more
into the direction I'm after.

Bets
Urs

Am Donnerstag, den 30.04.2020, 11:18 +0200 schrieb Thomas Weber:
> SharpEye has a text output format which gives the staff positions
> quite precisely – at least if there is no rotation of the page
> involved (which is a requirement for your use case anyway).  But the
> output format is not very well documented.
> 
> 
> Am 30.04.20 um 10:45 schrieb Urs Liska:
> > Hi Johannes
> > 
> > Am Donnerstag, den 30.04.2020, 09:57 +0200 schrieb Johannes Kepper:
> > > Hi Urs,
> > > 
> > > you could use the Measure Detector (
> > > https://measure-detector.edirom.de/), 
> > Thank you for this link.
> > 
> > > which automatically generates an MEI file with measure positions.
> > > You
> > > may preview those boxes by clicking on a file name after the file
> > > has
> > > been recognized. 
> > This is obviously a great tool that will help me to (maybe finally)
> > implement a long-standing wish of mine for pimping up the
> > Frescobaldi
> > manuscript viewer (
> > https://github.com/frescobaldi/frescobaldi/issues/923#issuecomment-621697927
> > ).
> > 
> > > However, it doesn't tell you how many staves will need to go in
> > > there, so this approach needs some more steps in a toolchain
> > > before
> > > you get your results, 
> > I have the impression that the tool is focused on something else,
> > and I
> > don't know whether  it is worth exploring it in the direction I
> > need
> > (especially because I'm sure there are other existing tools that
> > *do*
> > look for the same thing I do).
> > 
> > What I need is the exact position of all the stafflines to overlay
> > generated stafflines. Eventually you should be able to switch/blend
> > between empty staves, original score and hopefully a score
> > completed by
> > the teacher/students.
> > 
> > 
> > > but they will depend on your preferred tools and so on. I'm sure
> > > other approaches are equally possible… 
> > The preferred tools are not the most important part. Having an MEI
> > file
> > like the one from the measure-detector would surely be a good
> > starting
> > point for arbitrary tools.
> > 
> > Best
> > Urs
> > 
> > > All best,
> > > jo
> > > 
> > > > Am 30.04.2020 um 09:41 schrieb Urs Liska <ul at openlilylib.org>:
> > > > 
> > > > Dear MEI,
> > > > 
> > > > I am investigating ways to produce empty staves/barlines to
> > > > overlay
> > > > over scanned sheet music. The use case is creating
> > > > teaching/testing
> > > > sheets for music theory and aural training classes (so the
> > > > target
> > > > repertoire would be mostly common western notation).
> > > > 
> > > > My first approach was to create a Scribus script that draws
> > > > staff-
> > > > and
> > > > barlines from rectangles that have been drawn over the systems.
> > > > While
> > > > this works surprisingly well it is still a tedious work for
> > > > longer
> > > > and
> > > > full scores.
> > > > 
> > > > AFAIK the detection of staff- and barlines is basically a
> > > > solved
> > > > challenge in OMR. Could somebody point me towards the
> > > > potentially
> > > > easiest approach I should explore? Algorithms, libraries,
> > > > ready-to-
> > > > use
> > > > tools?
> > > > 
> > > > What I need is something that analyses (multipage) sheet music
> > > > from
> > > > image or PDF files and produces a structured text file with all
> > > > the
> > > > relevant coordinates, or anything from which I can instruct
> > > > some
> > > > tool
> > > > (whether Inkscape, Scribus, LilyPond or whatever) to generate
> > > > the
> > > > empty
> > > > sheet music to overlay over the scanned score.
> > > > 
> > > > Thank you for any pointers
> > > > Urs
> > > > 
> > > > PS: Do you agree with me that trying to somehow *remove* the
> > > > musical
> > > > content from a scanned image is a much less promising approach?
> > > > 
> > > > 
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