Chord Information Extraction from Score Images Using Notation Rules
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Solution Overview
Problem
Existing electronic musical instrument systems fail to accurately extract chord information from music score image data, as they cannot correctly interpret chord notation rules from general scores.
Innovation Solution
A chord information extraction device and method that includes a character group extractor, determiner, and corrector to identify and correct chord information from score image data based on predetermined notation rules, using font and position information to ensure accurate extraction and display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image analysis technique is used to read music score information, then music piece information can be extracted from score image data, but chord information cannot be extracted accurately
Solution Approach 1:
The patent segments the music score image data into distinct character groups, separating chord information from other musical notation. The character group extractor divides the score into individual character or character group units, allowing targeted extraction and analysis of chord-related characters independent of other musical elements.
Solution Approach 2:
The patent introduces a determination unit as an intermediary between the character group extractor and the final chord information output. This determination unit validates whether extracted character groups actually represent chord information by checking against chord notation rules, acting as a mediator to filter false positives and improve extraction accuracy.
2Adaptability or versatility
If general image analysis is applied to score data, then various music score information can be read, but chord notation rules cannot be verified
Solution Approach 1:
The patent performs preliminary extraction of character groups from the score image data before final chord information determination. The character group extractor预先 identifies and extracts potential chord-related character groups, which are then validated by the determination unit against chord notation rules, ensuring both versatility and precision.
Solution Approach 2:
The determination unit provides feedback to the extraction process by validating extracted character groups against chord notation rules. When character groups do not conform to expected chord notation patterns, the system can identify and correct extraction errors, creating a feedback loop that improves overall extraction accuracy.
3Ease of operation
If QR code is used for setting information, then setting information can be acquired easily, but chord information notated on score cannot be extracted
Solution Approach 1:
Instead of relying on QR codes or manual input, the patent directly copies and extracts chord information from the visual notation on the music score itself. The character group extractor captures chord characters directly from the score image, and the determination unit verifies them against chord notation rules, enabling automatic extraction without additional markup or codes.
Data Source
AI summary
A chord information extraction device includes a character group extractor, a determiner and a corrector. The character group extractor extracts a character group corresponding to chord information from score image data representing a music score. The determiner determines whether the character group extracted by the character group extractor follows a predetermined chord notation rule. In a case where the character group extracted by the character group extractor does not follow the chord notation rule, the corrector corrects the extracted character group to follow the chord notation rule.