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anti-spoofing-of-rppg's Introduction

anti-spoofing-of-rppg

the implement of 3D Mask Face Anti-spoofing with Remote Photoplethysmography

参数介绍

  • 滤波器参数
    • 两个数字,40,200,就是滤波器的频率截止范围
  • fft参数,长度fft_length
    • 决定频谱分辨率
    • 影响频谱稳定程度
  • fs -摄像头采样率

代码结构

  • 主函数选择图片读入方式,图像和摄像头
  • 然后启动定时器,每隔多少时间,获取一张图片进行分析。这个时间要和相机帧率匹配。 不然刷新之后读取到的其实是同一张图片。
    • 不知道帧率能不能调整
  • 对单张图片处理
    • 求帧率,保留处理到的时间
    • 求每一帧的ppg,并保存
    • 因为传入的是对象,所以所有数据都保存着一起传递,rppg会越来越长
    • 根据镜头帧率重采样
    • 求脉冲
      • 核心是fft,采样率就是采集到的图片总量
  • 影响因素
    • fft长度
    • 截止频率
      • 40-200
    • 分类区域
      • 8
    • 图像大小
      • 250-350

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