Analysis of druid-nb834nm6635
Leader
Move the mouse over the leader to zoom in on details.
Automatically extracted roll properties:
| Image width |
4096 pixels
(13.64 in.,
34.65 cm)
|
| Image length |
148920 pixels
(41.33 feet,
12.6 meters)
|
| Length DPI (measured) |
300.25 pixels/inch (118.2 pixels/cm)
|
| Width DPI (estimated) |
301.5738 pixels/inch (118.7 pixels/cm)
|
| Roll width |
3410.5 pixels
(11.309 in.,
287.2 mm)
|
| Bass margin |
245 pixels
(0.81 in.,
20.6 mm)
|
| Treble margin |
391 pixels
(1.3 in.,
32.9 mm)
|
| Soft margin (left+right) avg. |
49.5 pixels
(0.164 in.,
4.2 mm)
|
| Total drift |
37.07 pixels
(0.123 in.,
3.1 mm)
|
| Tracker spacing |
33.5082 pixels
(0.112 in.,
2.835 mm)
|
| Start row of roll |
617 pixels
(2.05 in.,
5.2 cm)
|
| End row of leader start |
2468 pixels
(8.22 in.,
208.78 mm)
|
| Row of first music hole |
9489 pixels
(2.63 ft.,
0.8 meters)
|
| Row of last music hole |
144919 pixels
(40.22 ft.,
12.26 meters)
|
| Music length |
135430 pixels
(37.59 ft.,
11.46 meters)
|
| Last musical hole to last row |
4001 pixels
(13.33 in.,
33.7 cm)
|
| Tracker holes |
99 (estimate)
|
| Holes per inch |
9 holes/inch
|
| Average music hole width |
17.64 pixels
(0.0585 in.
1.49 mm)
|
| Musical holes |
2148
|
| Musical notes |
2111
|
| Edge tears |
6
|
| Non-musical holes |
3
|
| Small non-musical holes |
173
|
| Dust score |
635 parts per million
|
| Shift count |
3
|
| Maximum shift |
-8.25 pixels
|
| Raw analysis file |
analysis.txt
in the ATON
format.
|
| Extacted MIDI file |
MIDI file with bass register
in track 1, treble register in track 2, bass expression in track 3, and
treble expression in track 4. Expression has not been applied to the notes.
|
Markup overview
Click on the following thumbnail to view a reduced-size image of the annotated
roll. The size of the annotated overview is 8.2 MB.
Detailed markup
Click on any of the following thumbnails to view a 10000-line section
of the roll with automatic markup overlaid onto the original scan. Image
resolutions are not reduced from 300 dpi, but lossy compression is added.
Each file is approximately 18 MB. The number above each segment is
the starting position in feet of the section from the beginning of the
full scan.
|
0.0
|
|
|
2.8
|
|
|
5.6
|
|
|
8.3
|
|
|
11.1
|
|
|
13.9
|
|
|
16.7
|
|
|
19.4
|
|
|
22.2
|
|
|
25.0
|
|
|
27.8
|
|
|
30.5
|
|
|
33.3
|
|
|
36.1
|
|
|
38.9
|
|
Graphic syntax of the markup:
- The margins of various sections of the roll are each given a
different color
(preleader,
leader,
post-leader,
music,
post-music).
- In the music section, the
hard margins
are medium blue,
and the
soft margins
are in a darker blue color.
Hard meaning the
roll never enters these columns in the image, and soft meaning
that the roll will wander into those columns (or there is an
edge tear jutting out into those columns).
- Vertical lines on the roll indicate estimated tracker bar centers. Dashed
vertical lines mean that no holes are present at that position. Green lines
indicate the
bass register,
and light blue lines indicate the
treble register
(the boundary between the two registers is currently only an estimate).
Snake-bite
track lines and holes are colored in red.
-
Musical holes
are colored in light blue, while
problematic holes
are colored in pink if they have a bad shape, light pink
if they are
too small,
or green if they are
too short
(often due to incomplete hole punching).
- Musical holes have a bounding box around them. The leading edge of the
box is yellow if this is the
start of a note attack
(or "expression" attack),
or orange if a
continuation of a note/expression.
The
bass side
of the box
is orange and the
treble/trailing side
is red.
- Tears
on the roll margins are highlighted in magenta.
- A horizontal dotted yellow line is extended across the paper at the start of
each note attack. Solid horizontal red lines indicate operator
shifts to the right,
and
solid orange lines are
shifts to the left.
Musical holes are given a
lighter blue color
when the shape of the hole is affected by a shift.
Left/Right Drift
The following plot shows the drift of the roll from left to right as it
is scanned. The total drift range is 49.5 pixels
(0.164 in., 4.2 mm).
Notice that this amount of shift is unusually large, so either there is
a tear extending into the soft margin causing the large range, or the holes
are wandering more than one tracker bar position (33.5082 pixels)
to the left/right during the length of the roll (which would cause incorrect notes
on a physical player piano).
Arrows indicate when the scanner operator shifts the roll left/right, with
red arrows being a shift to the right and orange to the left. The amount
of the shift is equal to the length of the arrows (which is on the same scale
as the y-axis).
Click on the plot to activate display of cursor coordinates if you want
to read the position of features in the plot precisely.
