Wide area measurement of piled logs using smartphone camera

Abstract

Previously, estimation of piled logs scattered in wide area is processed via hi-definition fixed camera which is not effective because the camera is attracted to be stolen. Therefore, the method to calculate area of segmented outdoor piled logs is now implemented on a smartphone which consists of an orientation sensor in order to benefit mobile usage and reduce cost of camera installation. The method is twodimensional area calculation of piled logs with virtual ruler grid based on images taken through a calibrated smartphone camera. The result shows that the proposed method is able to alleviate time-consuming issue, the method accuracy is relatively 88% compared to measuring by a tape measure.