Text this: Signal and image approximation using interval wavelet transform

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