Method used for detecting concentric circle of industrial part

• Main Authors: WANG XIAONAN, ZHENG SHUNYI, ZUO ZHIQI
• Format: Patent
• Language: Chinese; English
• Published: 28.04.2010
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The invention relates to a method used for detecting the concentric circle of an industrial part, which comprises the following steps: inputting the initial calibration parameter of the position of the concentric circle; detecting according to the initial calibration parameter; extracting a rectangular image from an original image and obtaining the gradient value of each pixel point in the rectangular image; searching the possible pixel points of an internal circle and an external circle according to the gray-scale value of the rectangular image, a gradient image and the initial calibration parameter; obtaining the fitting circle center coordinates and the fitting radius of the internal circle by the coordinate fitting internal circle of the possible pixel point of the internal circle; obtaining the fitting circle center coordinates and the fitting radius of the external circle by the coordinate fitting external circle of the possible pixel point of the external circle; and obtaining a distance between the fi