https://blog.wongcw.com/2021/05/11/ibm%e7%a0%94%e7%99%bclinechaser%e6%87%89%e7%94%a8%e5%b9%ab%e5%8a%a9%e7%9b%b2%e4%ba%ba%e5%9c%a8%e6%8e%92%e9%9a%8a%e6%99%82%e8%88%87%e4%bb%96%e4%ba%ba%e4%bf%9d%e6%8c%81%e8%b7%9d%e9%9b%a2/
IBM研發LineChaser應用幫助盲人在排隊時與他人保持距離