Single Axis Rotation Angle Measurement Toolbox

Using a Camera and a Checkboard

Hongxin Dong, Qiang Fu, Xu Zhao, Quan Quan and Ruifeng Zhang

       This is a MATLAB toolbox (download) for angle measurement. The toolbox can be used to measure single axis rotation angles from an image sequence of the checkboard (see Fig. 2).  The angle measurement method consists of two steps: calibration of single axis motion and angle measurement. In the first step, intrinsic parameters and the geometry relation of the checkboard, the camera and the rotation axis are calibrated by several images without occlusion. Then, the rotation angle of a certain image is measured. For more details, please refer to authors’ paper : Hongxin Dong, Qiang Fu, Xu Zhao, Quan Quan, Ruifeng Zhang. “A Practical Rotation Angle Measurement Method by Monocular Vision,” Applied Optics, 2015, 54(3): 425–435. [PDF].

       More info on the author’s website.

Fig.2 A sample checkboard for angle measurement toolbox. The number of interesting points of this checkboard is 54.