Chord information extraction device, chord information extraction method and non-transitory computer readable medium storing chord information extraction program

A chord information extraction method including:

• acquiring score image data representing a reference score;
• determining a score type of the reference score from among a plurality of score types based on the acquired score image data;
• determining a chord extraction region, from which chord information is to be extracted, corresponding to the reference score based on extraction region information defining a relationship between the plurality of score types and the chord extraction region;
• and
• extracting the chord information from the acquired score image data based on the determined chord extraction region.

A non-transitory computer readable medium storing a chord information extraction program that, when executed by a computer, causes the computer to:

• acquire score image data representing a reference score;
• determine a score type of the reference score from among a plurality of score types based on the acquired score image data;
• determine a chord extraction region, from which chord information is to be extracted, corresponding to the reference score based on extraction region information defining a relationship between the plurality of score types and the chord extraction region;
• and
• extract the chord information from the acquired score image data based on the determined chord extraction region.