Image Defocus Analysis for Finger Detection on A Virtual Keyboard

2020 25th International Conference on Pattern Recognition (ICPR)（2020）

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摘要

This paper describes the analysis of defocus information when a finger touching a virtual keyboard by using DCT (Discrete Cosine Transform) coefficient without detecting 3D position (especially exact depth value) of thr finger. We use 2 cameras and a half mirror to get the images of the finger with same optical axis. The focal length of the two cameras are slightly different. We can know the finge...

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关键词

virtual keyboard,depth estimation from focus,DCT,splitting light by half mirror

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