Measuring Infant's Length with an Image

It is important to measure an infant's length regularly to estimate the growth velocity to make sure that the infant is growing normally. Traditionally, measuring an infant's length is performed with an infantometer. However, the infant struggles and cries in the measuring process, and it often needs three persons to position the infant's head, legs, and the boards of the infantometer during the process. Thus, it is not practical for a parent to perform this measurement at home regularly. In this paper, we propose a new approach which allows the measurement of an infant's length using a cellphone picture without the need to position the infant. Our algorithm automatically calculates the 3D positions of the body parts and the total length of the infant with the help of round stickers. The round stickers can be put on the infant's body easily in a few seconds, before the picture is taken. This new technology would make frequent measurements of the infant's length and the tracking of the growth velocity possible.