Visual measurement of micro-target pose in ICF experiment
Zhang Yanan, Chen Xu, Wei Song, Shen Linyong · 2012
In ICF (Inertia confinement fusion) physical experiments, target-positioning accuracy directly affects the success rate of target hitting. This study uses three CCDs to acquire images of target from different viewing angles then the spatial coordinate values and the rotation matrix of target are calculated by integrating the characteristic values of the three CCDs. To obtain the characteristic values, this paper presents an image processing method of data fusion which combines template matching with ellipse contour fitting technology. Sub-pixel accuracy of location is obtained by adopting bicubic interpolation. Proved by practice test this method has the advantages of high stability, low time consumption and high accuracy over 1 μm.