Needle Plate Hole Border Detection by Improved Random Hough Transform
Zhang Jun-an · Journal of Xi'an Technological University · 2008
This paper focuses on improved random Hough transform to detect the edges of location holes and mounting holes,and eliminate the interference between the edges of location holes,mounting holes and cloth sending rack in the detection by tranditional random Hough transform.With edge separation the edges of holes on needle plale are expressed into chain tables,the interference is eliminated by matrix features of each chain table.Testing hole is implemented in separated edge area without any edge interference.The needle plate image processing experiment results show this method can detect not only the hole but also circular border segment to realize non-contact measurement of needle plate.