Camera calibration is a key technology in computer vision

and multi camera calibration is the inevitable step towards an efficient use of multi camera systems. For multi camera systems

a method based on multi view registration is proposed. A planar model with known reference points placed at a few different locations is only required as a calibration object. Using constrained optimization method

each camera coordinate system can be translated into reference camera coordinate system

and thus can get the relative positions between them. The experimental results show that the method is practical in multi view calibration.