International Journal of Computer Vision and Image Processing, 2(3), 59-70, July-September 2012 59 Copyright © 2012, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Keywords: Conveyor, Differential Techniques, Dynamic Selection, Ego-Motion Programmable Logic Controllers (Ego-Motion PLC), Flux, Object Detection, Pixel Count, Supervisory Control and Data Acquisition (SCADA) Machine Vision Based Non-Magnetic Object Detection and Removal on Moving Conveyors in Steel Industry through Differential Techniques K. C. Manjunatha, Prakash Steels & Power Private Limited, Challekere, India H. S. Mohana, Department of Instrumentation Tech, Malnad College of Engineering, Hassan, India P.A. Vijaya, Department of Electronics and Communication, Malnad College of Engineering, Hassan, India ABSTRACT Intelligent process control technology in various manufacturing industries is important. Vision based non- magnetic object detection on moving conveyor in the steel industry will play a vital role for intelligent process and raw material handling. This paper presents an approach for a vision based system which performs the detection of non-magnetic objects on raw material moving conveyor in a secondary steel making industry. At single camera level, a vision based differential algorithm is applied to recognize an object. Image pixels based differential techniques; optical fow and motion based segmentations are used for traffc parameters extrac- tion, the proposed approach extends those futures into industrial applications. The authors can implement smart control system, since they can save the energy and control unnecessary breakdowns in a robust manner. The technique developed for non-magnetic object detection is having single static background. Establishing background and background subtraction from continuous video input frames forms the basis. Detection of non-magnetic materials which are moving with raw materials and taking immediate action at the same stage as material handling system will avoid the breakdowns or power wastage. The authors achieve accuracy up to 95% with the computational time of not more than 1.5 seconds for complete system execution. DOI: 10.4018/ijcvip.2012070105