Qian Liang's research while affiliated with Beihang University (BUAA) and other places

Publication (1)

Article
To obtain high speed and accuracy, passive autofocusing system and two-stage searching strategy have been widely applied in microscopy. The kernel of the passive autofocusing system is the selection of the focus criterion functions, which will significantly affect the efficiency and accuracy of the autofocusing system. In order to help choose the b...

Citations

... These methods are very simple; however they suffer from an excessive slowness. To improve the speed of the searching, adaptive searching has been proposed [7][8][9][10][11]. The idea is to vary the sharpness index by large steps as long as defocused images are acquired (Coarse Search: CS), and to decrease the variation step in the proximity of the optimal in-focus conditions (Fine Search: FS): in this way, a good trade-off between the searching speed and the accuracy of the focusing is obtained. ...