System and method of detecting abnormal movement of a physical object

The method of 1, wherein the calculation of the mutual information array is performed based on an equation of:

• MI
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• p
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• log
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• where x and y each represents components of one of the two ECG arrays of the adjacent ECG segments, p(x,y) represents the joint probability of the two ECG arrays, and p(x) and p(y) each represents the marginal probability of one of the two ECG arrays of the adjacent ECG segments.

An abnormality analysis system comprising:

• a computer readable storage medium encoded with a computer program code;
• a processor coupled to the computer readable storage medium, the processor being configured to execute the computer program code;
• wherein the computer program code is configured to cause the processor to:
• receive an electrocardiography (ECG) data array representing a predetermined duration of activity of a heart;
• divide the ECG data array into a plurality of ECG segments, each ECG segment including a nominal ECG waveform, and the plurality of ECG segments including one or more pairs of adjacent ECG segments;
• for each pair of the one or more pairs of adjacent ECG segments:
• derive two same-size ECG arrays representative of magnitude of waveforms of the adjacent ECG segments by re-sampling one or both of the adjacent ECG segments;
• and
• calculate joint probability and marginal probability of the two same-size ECG arrays of the adjacent ECG segments;
• generate a mutual information array based on the calculated joint probability and the calculated marginal probability of the one or more pairs of adjacent ECG segments;
• and
• determine likelihood of abnormal movement of the heart by comparing the mutual information array or a set of indexes derived from the mutual information array with a predetermined benchmark pattern.

A computer readable storage medium being encoded with a computer program code which when executed by a processor causes the processor to perform a method comprising:

• receiving an electrocardiography (ECG) data array representing a predetermined duration of activity of a heart;
• dividing the ECG data array into a plurality of ECG segments, each ECG segment including a nominal ECG waveform, and the plurality of ECG segments including one or more pairs of adjacent ECG segments;
• for each pair of the one or more pairs of adjacent ECG segments:
• deriving two same-size ECG arrays representative of magnitude of waveforms of the adjacent ECG segments by re-sampling one or both of the adjacent ECG segments;
• and
• calculating joint probability and marginal probability of the two same-size ECG arrays of the adjacent ECG segments;
• generating a mutual information array based on the calculated joint probability and the calculated marginal probability of the one or more pairs of adjacent ECG segments;
• and
• determining a likelihood of abnormal movement of the heart by comparing the mutual information array or a set of indexes derived from the mutual information array with a predetermined benchmark pattern.