thank you for the reply. i ve been studying openCv now.
but i have new problem, i can't make my robot move smoothly, i ve information about to set the speed of the movement and using the kind of filter called "low pass filter" to get really cool and smooth movements.
as you known, i use codevision avr atmega32 at my controller,can you give me some example of program low pass filter please?because some example i search at google is with arduino.
thank you very much