With technical development a computer today can be wearable just like our clothing. Unlike normal desktop computers, a wearable computer is always on and ready to help the user. To react as we do in a normal situation, a wearable computer has to experience the life of the user.
Wearable video is such a way for a wearable computer to experience what the user is seeing.
A key component of wearable computers is a digital video camera which is normally mounted on the head of the user.