改进Camshift算法的多人脸跟踪，衣服的颜色辅助信息，有效的改善Camshift算法的缺点，不至于使遮挡时跟踪趋向于强势窗口。-Improved multiplayer Camshift face tracking algorithm, the color of clothing auxiliary information, an effective method to improve the Camshift shortcomin