Now, there has some limitations in augmented reality system completely by the computer and camera. Due to the
resolution of camera, Only when logo are appeared in the
video, the virtual 3 d objects can be seen. It limit the size of
the virtual objects and movement speed. If an object hides
logo, the virtual image will has some wrong displaying. The
greater the actual size, it can track the farther; and the complexity of the logo graphic affect the scope, Camera toward also influences tracking effect, Relative Angle is smaller, the more difficult it is to correctly identify.