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17 Cards in this Set
- Front
- Back
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Music Sheet (Image Form) Intelligent System Interpret Music Symbols Generate Melody |
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Locate Regular Notes Distinguish Type Note on Scale (A,B,C) using Staff Lines Length of the Notes, Flags, Beams
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Keys Major or Minor Sharps and Flats, Corresponding Notes Treble Clef, Bass Clef Rests, Dotted Notes Playstyle information |
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Scope, Major Assumptions Input Digital vs Handwritten High Resolution Horizontal Staff Lines |
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Outline Resizing Pages to Consistent Resolution Blur away Salt and Pepper, Gaussian Filter Convert Binary |
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Many Ways Horizontal Projection (Scott Sheridan, Susan E. George) Straightforward Sum Black Pixels Row Peak, Find Location Staff Line Use White Gaps Indicators Stanza/Segment Division |
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Downsides, Slight Distortions/Rotations Probably Fixable With Some Extra Pre-Processing |
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Used by Many Hough Circle Transform Main Note Detector More Robust to Gaps Gap Stitching For Every Gap Caused By Staff Line Removal, Project |
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Flood Fill Algorithm (David Bainbridge and Tim Bell) Familiar Paint, Bucket Tool Isolated Pixel Connectivity |
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A Good Parameter to Use is and Estimation Of the Note Diameter Circle Hough Transform |
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Based On Bounding Box Analysis (David Bainbridge and Tim Bell) Split Into 3 Note Categories Group Note Type, Single Note Type Template Matching, Data-Driven Technique to Classify Symbol
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For each Group Note or Single Note, Template Matching Locate Noteheads Circle Green Dots
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With location of note, find length Signature Analysis (Yun-Chung Chung and Greg C Lee) Project a Vertical Scan Line Increment Number of Black/White Gaps Problem with Signature Analysis Because So Parametric, Missing Data |
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Form Contextual Recognition (K Todd Reed and J.R. Parker) Use Detectors To Locate Features Graph Grammars to Pull Information I took a conceptual idea from their paper Fill Missing Data
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Using Bounding Box Analysis to Find Dotted Notes (David Bainbridge and Tim Bell)
Alternative Approach Original Proposed Method of Symbol Identification
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Divide Right Hand By Left Hand Using Number of Detected Sharps/Flats to Determine the Key To Recap, For each Note, Know Location (Pixels) and Length (Time) Extrapolate Location of Staff Lines to find Pitch For each Note
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When Construct Midi, Important, 2 separate Channels Common Problem with Other, Reciprocate Error In Time Sequence Ex. 2 Quarter Notes 2 Half Notes, Rest Of Song Off Alignment Analysis Stretch or Shrink Note Duration |
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