Deformed steel bar size measurement method based on image analysis

• Main Authors: FAN CAIXIA, CHEN YAJUN, DING YUANYUAN, KANG XIAOBING
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2021
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The invention provides a deformed steel bar size measurement method based on image analysis. The deformed steel bar size measurement method comprises the following steps: acquiring a deformed steel bar side image through an area array CCD camera vision acquisition platform; preprocessing the acquired deformed steel bar side surface image; providing a first calculation scheme, namely a pixel-level deformed steel bar size measurement method; carrying out sub-pixel edge detection, and on the basis, providing a second calculation scheme, namely a deformed steel bar size measurement method under a sub-pixel level; continuously performing boundary tracking on the basis of the sub-pixel level edge detection image; on the basis, providing a third calculation scheme, namely an image projection method; and converting a calculation result into a physical size by using an actual size measurement method and a simple camera calibration method to obtain a final deformed steel bar size. The measurement method provided by the