Hi Pankaj,
Sorry for the delayed reply!
I really want to help you, but your project idea is still not clear for me.
You’ve mentioned in your early post that
“I have to make an automated vigilance camera with the help of which we can see through laptop or mobile with the use of internet. “
Where you want to use a microcontroller here? We already have softwares like Skype.
Then in another post you mentioned that
“Camera zooming should be controlled by computer(may be online or offline). And for zooming there is 4 lense which have to controlled by using stepper motor.“
If I’m not wrong the mobile or laptop cameras dont have zoom lens.