In this paper, the authors propose a real time object detection system for surveillance. Four C method mainly concentrates on real time and accurate object detection framework which use only one processing thread. Through four C method the special hardware like GPU has been restored. The first step of object detection is contour capture. Secondly, the image is processed using best contour based object detection method, that is CENTRIST visual descriptor and using a linear classifier. Above step avoid feature extraction and image processing, which made the system less complex and increases detection speed.