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

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Text this: Generalized Perona-Malik equation for image restoration