Text this

Number:

Provider:

CAPTCHA:

 _    _     ______   ______    _    _    _    _   
| \  / ||  /_   _// |      \\ | || | || | \  / || 
|  \/  ||   -| ||-  |  --  // | || | || |  \/  || 
| .  . ||   _| ||_  |  --  \\ | \\_/ || | .  . || 
|_|\/|_||  /_____// |______//  \____//  |_|\/|_|| 
`-`  `-`   `-----`  `------`    `---`   `-`  `-`

Please enter what you see:

Text this: Exploration of illumination normalization based on divisive normalization