hi there, i am a newbie to computer vision application and opencv so kindly be gentle :D my application is to detect a cube in the 3D space and apply visual servoing concepts to change pose of the robot arm to catch the cube from what i read, that i have to supply the model of the cube in the format of xml so the cascade function can detect and track my questions are; 1) how to create xml model for the cube? 2) is what i am thinking is right? 3) is there any possible way to build the model of the cube and how? thanks your time and cooperation is highly appreciated