HIGHLIGHTS
SUMMARY
The authors propose a large receptive field gradient operator, which can accurately locate the joint cavity, further segment the finger region, limit the area between the two joint cavities of the finger, and eliminate the influence of finger displacement and deformation. The main contributions of this paper are as follows: A novel gradient operator called the large receptive field gradient operator is proposed, which can solve the problem of joint cavity localization caused by a large gradient in the process of finger joint cavity imaging. (2) According to the change in finger joint cavity . . .
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