This repository contains multiple tools for OMR dataset processing, the goal is to create a new dataset by combining AudioLabs v2, Muscima , OSLiC and a custom dataset MZKBlank, on which the YOLOv8 model can be trained.

In the final dataset, there are 7013 images that contain almost half a million bounding boxes.

Semester work at MFF CUNI under the guidance of Jirka Mayer.

• User documentation
• Download the latest dataset (~2.5 GB)
• Download the latest model (~50 MB)
• MZKBlank dataset

AudioLabs v2 is an extension of the AudioLabs v1 dataset, its annotations were generated with the help of a neural network and the original dataset, the images are generated from CSV files. Grand staves and system bounding boxes were added manually to the dataset.

MUSCIMA is a dataset of handwritten music notation for musical symbol detection that is based on the MUSCIMA dataset. Grand staves and system bounding boxes were added manually to the dataset.

Collection of songs by 19th century composers in MuseScore format with associated data. The annotations were parsed from CSVs that were generated along with PNGs using the MuseScore app from dataset's MSCX scores.

Because of many inconsistencies, some scores were ruled out of the final dataset, despite all this these are a pixel-accurate annotations.

For best training results 1-10% of images in the dataset should be background images (negative samples), unfortunately the datasets mentioned above do not contain enough of these examples.

Moravská Zemská Knihovna (MZK) offers access to more than two thousand public domain sheet music documents with over nine thousand labeled pages that do not contain any music (blank, front_cover, front_end_sheet, title_page, table_of_contents and more) - our negative samples.

MZKBlank contains 1 006 semi-randomly chosen images that are related to sheet music but do not contain any sheet music. The numbers of representatives of one label are relative to the total number of pages.

Version in Czech is here.

Optical Music Recognition (OMR) is a task that aims to automatically recognize the musical content of a document from a photo or scan of music notation for further processing (search, printing, editing, musicological analysis). For processing existing archival materials in libraries, however, it is first necessary to distinguish whether a given page contains musical notation, or what kind of notation (modern, mensural, choral, printed, written). At the moment, the best recognition models work at the level of individual lines of notation, so it is also necessary to identify individual lines during the analysis of a document so that the music can be well processed by the recognition models.

The goal of this project is to create a music notation page analyzer that will serve as a first stage in the automatic recognition of music notation pages. The analysis will be designed as an image object detection task, where the main goal will be to train (retrain) the state-of-the-art model YOLOv8. The focus of the work lies in the preparation of the training data, as it will be necessary to harmonize a number of existing datasets into a unified format with the possible inclusion of synthetic data. At the same time, it will be necessary to decide what parameters of musical notation to analyse - a compromise must be found between what we need to know and what we are able to learn from the available datasets.

1. Staves and staff systems extraction from SVG

• by @Kristyna-Harvanova , the project can be found here

2. Grand staff extraction from SVG

• by @Jirka-Mayer , the project can be found here

Frank Zalkow, Angel Villar Corrales, TJ Tsai, Vlora Arifi-Müller, and Meinard Müller
Tools for Semi-Automatic Bounding Box Annotation of Musical Measures in Sheet Music
In Demos and Late Breaking News of the International Society for Music Information Retrieval Conference (ISMIR), 2019.

GitHub

Jan Hajič jr., Pavel Pecina. In Search of a Dataset for Handwritten Optical Music Recognition: Introducing MUSCIMA  . CoRR, arXiv:1703.04824, 2017. https://arxiv.org/abs/1703.04824.

Alicia Fornés, Anjan Dutta, Albert Gordo, Josep Lladós. CVC-MUSCIMA: A Ground-truth of Handwritten Music Score Images for Writer Identification and Staff Removal. International Journal on Document Analysis and Recognition, Volume 15, Issue 3, pp 243-251, 2012. (DOI: 10.1007/s10032-011-0168-2).

GitHub

Gotham, M. R. H.; and Jonas, P. The OpenScore Lieder Corpus. In Münnich, S.; and Rizo, D., editor(s), Music Encoding Conference Proceedings 2021, pages 131–136, 2022. Humanities Commons. Best Poster Award. https://doi.org/10.17613/1my2-dm23

Muscima takes empty staves as valid staves, we only consider staves with some music to be valid, this lead to multiple problems while working with M - empty staves are marked as valid. This has to be fixed mostly manually.

System are mainly created by looking at system staves at approximately the same height that are than connected to one (system) bounding box. Because M is handwritten, not all system measures end at the end of their respectable staves, this leads to a creation of systems, that may exclude a part of stave, that in reality is a part of the system.