LIU Qiang, HAN Jinghui, LIU Mi, et al. Research of micro hole detection of fiber probe based on improved point Hough transform[J]. 2020, (4): 9-12. DOI: 10.13873/J.1000-9787(2020)04-0009-04.
The algorithm principle of point Hough transform used to detect circle is studied
and the effect of the approximate processing of circle parameters with point Hough transform on the precision is analyzed. Then
an improved point Hough transform circle detecting algorithm is proposed
which can be used to effectively select the calculated multi-group circle parameters. Simulation and experimental research show that the improved point Hough transform algorithm is more accurate in the circle center coordinate detection. The ring gauge with 1 mm diameter is measured and analyzed
and the measurement result is 0. 997 9 mm
it shows that contact-type fiberoptic probe micro hole measurement has good application effect.