A study on the real time obstacle recognition by scanned line image

스캔라인 연속영상을 이용한 실시간 장애물 인식에 관한 연구

  • Cheung, Sheung-Youb (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Oh, Jun-Ho (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
  • 정성엽 (한국과학기술원 기계공학과) ;
  • 오준호 (한국과학기술원 기계공학과)
  • Published : 1997.10.01


This study is devoted to the detection of the 3-dimensional point obstacles on the plane by using accumulated scan line images. The proposed accumulating only one scan line allow to process image at real time. And the change of motion of the feature in image is small because of the short time between image frames, so it does not take much time to track features. To obtain recursive optimal obstacles position and robot motion along to the motion of camera, Kalman filter algorithm is used. After using Kalman filter in case of the fixed environment, 3-dimensional obstacles point map is obtained. The position and motion of moving obstacles can also be obtained by pre-segmentation. Finally, to solve the stereo ambiguity problem from multiple matches, the camera motion is actively used to discard mis-matched features. To get relative distance of obstacles from camera, parallel stereo camera setup is used. In order to evaluate the proposed algorithm, experiments are carried out by a small test vehicle.


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