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BowenC/Orchestra_Layout_Dataset

Orchestral Score Layout Dataset Ground-truth annotations for staff layout detection in orchestral music scores, covering two Tchaikovsky symphonies. Contents dataset_layout/ ├── Tchai_4.pdf # Source PDF — Tchaikovsky Symphony No. 4 ├── Tchai_4/ # Page images (PNG, one per page) ├── Tchai_4_csv_gt/ # Per-page CSV ground truth for Tchai_4 │ ├── Tchai_6.pdf # Source PDF — Tchaikovsky Symphony No. 6 ├── Tchai_6/… See the full description on the dataset page: https://huggingface.co/datasets/BowenC/Orchestra_Layout_Dataset.

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Orchestral Score Layout Dataset

Ground-truth annotations for staff layout detection in orchestral music scores, covering two Tchaikovsky symphonies.

dataset_layout/
├── Tchai_4.pdf              # Source PDF — Tchaikovsky Symphony No. 4
├── Tchai_4/                 # Page images (PNG, one per page)
├── Tchai_4_csv_gt/          # Per-page CSV ground truth for Tchai_4
│
├── Tchai_6.pdf              # Source PDF — Tchaikovsky Symphony No. 6
├── Tchai_6/                 # Page images (PNG, one per page)
└── Tchai_6_csv_gt/          # Per-page CSV ground truth for Tchai_6

Piece	Pages
Tchaikovsky Symphony No. 4	129
Tchaikovsky Symphony No. 6	219

File Naming

Page images: Tchai_4/Tchai_4_001.png, Tchai_4/Tchai_4_002.png, … Per-page CSVs: Tchai_4_csv_gt/Tchai_4_001.csv, Tchai_4_csv_gt/Tchai_4_002.csv, …

The three-digit zero-padded number in the filename corresponds to the page number within the score (matching the page field in the CSV).

CSV Format

Each per-page CSV in *_csv_gt/ uses the following 15-column schema:

page, staff, system, staffgroup, num_ins, ens,
ins1, part1, tone1,
ins2, part2, tone2,
ins3, part3, tone3

Row structure

Each row describes one staff line on a page. A page typically contains multiple staves across one or more systems.

—The page field is filled only in the first row of each page. Subsequent rows on the same page leave it blank.
—In the per-page CSVs the page field is filled only in the first data row; the header is always present.

Column descriptions

Column	Type	Description
`page`	string	3-digit zero-padded page number (e.g. `001`). Present only in the first staff row of each page.
`staff`	integer	Sequential staff index on the page, starting at 1.
`system`	integer	System (grand staff group) index on the page, starting at 1. Pages with only one system always have `1` here.
`staffgroup`	integer	Orchestral section the staff belongs to (see table below).
`num_ins`	integer	Number of instruments sharing this staff line (`1` or `2`). Empty cells should be treated as `1`.
`ens`	string	Ensemble qualifier for the staff: `divisi` (part splits into two), `unis` (unison), or empty.
`ins1`	string	Name of the primary (or only) instrument on this staff.
`part1`	string/int	Part number of `ins1` when the section has multiple players (e.g. `1`, `2`). Empty if not applicable.
`tone1`	string	Transposition key of `ins1` (e.g. `B`, `F`, `A`). Empty for non-transposing instruments.
`ins2`	string	Name of the second instrument when `num_ins` = 2 (e.g. a piccolo sharing a flute staff).
`part2`	string/int	Part number of `ins2`.
`tone2`	string	Transposition key of `ins2`.
`ins3`	string	Name of a third instrument (reserved; not used in current annotations).
`part3`	string/int	Part number of `ins3`.
`tone3`	string	Transposition key of `ins3`.

Staffgroup

staffgroup is a sequential integer that groups adjacent staves belonging to the same orchestral section (e.g. all woodwind staves share one value, all brass staves share the next, and so on). The numbering restarts from 1 on each page and within each system, so the values themselves carry no fixed meaning — only equality matters: staves with the same staffgroup value belong to the same section. In a typical orchestral score the groups follow the conventional order: Woodwinds → Brass → Percussion → Strings.

Example — single-system page (Tchai_4 page 001)

csv

page,staff,system,staffgroup,num_ins,ens,ins1,part1,tone1,ins2,part2,tone2,ins3,part3,tone3
001,1,1,1,,,flute,,,,,,,,
,2,1,1,,,oboe,,,,,,,,
,3,1,1,,,clarinet,,B,,,,,,
,4,1,1,,,bassoon,,,,,,,,
,5,1,2,2,,horn,1,F,horn,2,F,,,
,6,1,2,2,,horn,3,F,horn,4,F,,,
,7,1,2,,,trumpet,,F,,,,,,
,8,1,2,2,,trombone,1,,trombone,2,,,,
,9,1,2,2,,trombone,3,,tuba,,,,,
,10,1,3,,,timpani,,,,,,,,
,11,1,4,,,violin,1,,,,,,,
,12,1,4,,,violin,2,,,,,,,
,13,1,4,,,viola,,,,,,,,
,14,1,4,,,cello,,,,,,,,
,15,1,4,,,bass,,,,,,,,

Staff 5 has num_ins=2 and carries Horn 1 and Horn 2 on the same line; their shared transposition key is F.

Example — multi-system page (Tchai_4 page 004)

csv

page,staff,system,staffgroup,num_ins,ens,ins1,part1,tone1,ins2,part2,tone2,ins3,part3,tone3
004,1,1,1,,,clarinet,,B,,,,,,
...
,9,1,3,,,bass,,,,,,,,
,10,2,1,,,horn,,F,,,,,,   ← system 2 begins
,11,2,2,,,violin,1,,,,,,,
...

When a page contains multiple systems, the system counter increments and staves are renumbered from 1 for each system within the staff column (sequential across the whole page).