  We present a 3D printed adapter with planar mirrors for stereo reconstruction
using front and back smartphone camera. The adapter presents a practical and
low-cost solution for enabling any smartphone to be used as a stereo camera,
which is currently only possible using high-end phones with expensive 3D
sensors. Using the prototype version of the adapter, we experiment with
parameters like the angles between cameras and mirrors and the distance to each
camera (the stereo baseline). We find the most convenient configuration and
calibrate the stereo pair. Based on the presented preliminary analysis, we
identify possible improvements in the current design. To demonstrate the
working prototype, we reconstruct a 3D human pose using 2D keypoint detections
from the stereo pair and evaluate extracted body lengths. The result shows that
the adapter can be used for anthropometric measurement of several body
segments.
