Calise

Added some improvements, cleaned a bit the code.Now the program runs in a loop cycle.Now, on linux, with writing rights on the backlight (or running as root !not suggested!), you can change the $acpi_path, $verbose and/or $time_gap vars to make the script fully automated.

I just tried the script on a windows 7 machine, and I got opencv errors on taking control of the webcam.Really dunno why that happens and I'm not in the right mood to investigate on windows.I'll apreciate interested windows users' patches