Method of mobile image identification for flow velocity and apparatus thereof

A method of mobile image identification for flow velocity, comprising steps of:

• projecting a plurality of laser spots on a water surface;
• photographing continuously a plurality of water-surface images including said plurality of laser spots;
• acquiring reference coordinates of said plurality of laser spots in said plurality of water-surface images, respectively;
• calculating real coordinates of said plurality of laser spots, respectively;
• restoring said plurality of water-surface images to a plurality of orthogonal images;
• analyzing said plurality of orthogonal images for giving a plurality of flow-velocity vectors, and analyzing said reference coordinates for giving a reference length of said plurality of laser spots;
• and
• combining said plurality of flow-velocity vectors and said reference length for giving the flow velocity on said water surface.