A Large-panel Two-CCD Camera Coordinate System with an Alternate-Eight-Matrix Look-Up-Table Method

This study proposed a novel positioning model, composing of a two-camera calibration system and an Alternate-Eight-Matrix (AEM) Look-Up-Table (LUT). Two video cameras were fixed on two sides of a large-size screen to solve the problem of field of view. The first to the fourth LUTs were used to compute the corresponding positions of specified regions on the screen captured by the camera on the right side. In these four LUTs, the coordinate mapping data of the target were stored in two matrixes, while the gray level threshold values of different positions were stored in other matrixes. Similarly, the fifth to the eighth LUTs were used to compute the corresponding positions of the specified regions on the screen captured by the camera on the left side. Experimental results showed that the proposed model can solve the problems of dead zones and non-uniform light fields, while achieving rapid and precise positioning results.

► A novel positioning model uses Alternate-Eight-Matrix (AEM) Look-Up-Table (LUT) method.
► The color component is added in LUT for binarization to improve positioning accuracy.
► The actual corresponding coordinate position of the object in space can be obtained.