title: Single-Image Distance Measurement by a Smart Mobile Device.
abstract: Existing distance measurement methods either require multiple images and special photographing poses or only measure the height with a special view configuration. We propose a novel image-based method that can measure various types of distance from single image captured by a smart mobile device. The embedded accelerometer is used to determine the view orientation of the device. Consequently, pixels can be back-projected to the ground, thanks to the efficient calibration method using two known distances. Then the distance in pixel is transformed to a real distance in centimeter with a linear model parameterized by the magnification ratio. Various types of distance specified in the image can be computed accordingly. Experimental results demonstrate the effectiveness of the proposed method.
authors.forename: Shangwen
authors.initials: S
authors.lastname: Chen
authors.forename: Xianyong
authors.initials: X
authors.lastname: Fang
authors.forename: Jianbing
authors.initials: J
authors.lastname: Shen
authors.forename: Linbo
authors.initials: L
authors.lastname: Wang
authors.forename: Ling
authors.initials: L
authors.lastname: Shao