Vision Positioning Method for the Opening of Railway Oil Tank Wagon Based on Shape Matching
To overcome the positioning errors caused by non-uniform illumination,oil tank wagon type and camera location,a vision positioning method based on shape matching was proposed in this paper.Based on the characteristic that the opening of the oil tank wagon is a standard geometric shape,the edge of the opening can be extracted from a standard image so that the shape of the opening can be described by shape fitting method,which is used as standard template of image recognition,then contour normalized correlation is employed to search the object in the image.By scalable template various types opening image of railway oil tank wagon can be detected by the proposed method.To gain a speed-up,image pyramid is applied to reduce calculation amount.The experimental results show that the proposed method fully satisfies the requirements of practical industrial applications.
machine visionvision positioningshape matchingrailway oil tank wagon
万方数据
维普
