Text this: Indoor visible light positioning system based on image sensor

            ______    _  _    __   __    ______  
  ____     /_   _//  | \| ||  \ \\/ //  /_____// 
 |    \\    -| ||-   |  ' ||   \ ` //   `____ `  
 | [] ||    _| ||_   | .  ||    | ||    /___//   
 |  __//   /_____//  |_|\_||    |_||    `__ `    
 |_|`-`    `-----`   `-` -`     `-`'    /_//     
 `-`                                    `-`