Target localization method based on wireless multimedia sensor network

A single node and double nodes target localization method used in simplified calibration scenes was proposed based on the characteristics of wireless multimedia sensor network(WMSN) to deal with multi-node cooperation.The pixel coordinate of the special point was gained through using the auxiliary calibration object with color to mark the position of special node and using the Camshift algorithm to trace the color of auxiliary calibration object.The location of special node in monitor area was used to obtain the parameters of the camera matrix.Three-dimensional coordinates of moving targets were obtained through arranging tow nodes which have the characteristic of translation.Experimental results showed that the largest error of single node plane localization was 12.16 cm,the largest error of double nodes plane localization was 13.69 cm,and the error of double nodes height localization was 3-5 cm.The error surface of two-dimensional plane shows that the localization error of the most nodes can meet the needs of WMSN target localization with low complexity and simple implementation.