Steel wire rope diameter and out-of-roundness online measurement method based on sub-pixel edge positioning

The invention discloses a steel wire rope diameter and out-of-roundness online measurement method based on sub-pixel edge positioning. The process comprises the steps of digital image acquisition and processing, digital image edge positioning, data acquisition and calculation of steel wire rope measurement parameters. According to digital image acquisition and processing, two steel wire rope digital images are simultaneously acquired at a certain position in the central axis direction of the steel wire rope and at a position spaced by 90 degrees in the circumferential direction. The digital image edge positioning is to perform sub-pixel-level positioning on the edge of the digital image acquired by the digital camera. The coordinates of the sub-pixels and the physical dimensions of the unit pixels are extracted. The method can realize high-precision online measurement of the diameter and the out-of-roundness of the steel wire rope. 本发明公开的基于亚像素边缘定位的钢丝绳直径和不圆度在线测量方法，过程包括数码图像采集与处理、数码图像边缘定位，数据采集，钢丝绳测量参数的计算。数码图像采集与