A Study on Feature Extraction of Hand-Drawn Rhythmic Lines in Movement Analysis

Abstract

The Kestenberg Movement Profile (KMP) is a method of movement analysis from a psychoanalytic perspective. In KMP, the analyst usually makes a recorded waveform (notation) called a rhythm line from the subject's natural daily movements, and the basic pattern (pure rhythm) extracted from the rhythm line and other characteristics are used for analysis. However, the obtained rhythm lines contain ambiguities because the rhythm lines are drawn based on the analyst's physical empathy, senses, and habits. Extracting and analyzing pure rhythms requires a wealth of experience and a high level of expertise. Therefore, the demand for a system to automatically extract and analyze pure rhythms from the given rhythm lines has been growing in the field of clinical application. In this study, the authors first developed a pen tablet-based system to input rhythm lines toward the automatic movement analysis using KMP. As a first step, we investigated a feature extraction method for extracting pure rhythms from rhythm lines drawn by an analyst.