A quick method to extract earphone-related ear dimensions using two-dimensional (2D) image

Abstract

Earphones and ear-related products are broadly used in daily life. The dimension of the earphone affects the fit of the products and further influences the comforts of users. Several studies were conducted to measure and to describe the morphology of the ear. However, the gauges and definitions of key dimensions varied across different studies and the measurements were not practical for ear-related products design. In this paper, we proposed a quick method to extract an earphone-related ear dimensions using two-dimensional (2D) image of the ear. In total, six dimensions would be calculated, including ear height, ear width, ear length, the height of cavum conchae, the width of cavum conchae, and earlobe height. The quick method to extract ear dimension is a practical way for determining the size system of earphone during product design.