解决numba报错警告：No implementation of function Function found for signature

在跑kcf的时候报错No implementation of function Function found for signature
将

alfa = np.zeros((height, width, 2), np.int)

修改为

alfa = np.zeros((height, width, 2), dtype=np.uint8)

另：将@jit去掉后发现，视频检测速度从170fps降低为2fps，看来提升好明显
参考链接
https://blog.youkuaiyun.com/qq_43474959/article/details/115031400