Funding for this research was provided by:
Guangdong Provincial Key Laboratory of Digital Signal and Image Processing Techniques</funding-source> (2013GDDSIPL-03)
Guangxi Basic Ability Promotion Project for Young and Middle-aged Teachers (2017KY0247)
Article History
Received: 14 January 2017
Revised: 25 October 2017
Accepted: 11 January 2018
First Online: 24 January 2018