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【Android项目】使用Android手机的摄像头，通过闪光灯识别手指的血管，完成心率的检测，绘制出心率图

License: Apache License 2.0

Java 100.00%

heartrate's Introduction

HeartRate

【Android项目】使用Android手机的摄像头，通过闪光灯识别手指的血管，完成心率的检测，绘制出心率图

<检测心率的原理>

当打开App时，手机的闪光灯也会被自动打开，用户将手指放在摄像头上时，指尖皮下血管由于有血液
被压入，被光源照射的手指亮度（红色的深度）会有轻微的变化。这个过程可以凭借感光元件捕捉到。
这样毛细血管的搏动就能通过画面明度的周期性变化反映出来。

下面是刚刚打开App时的界面：


image

这个则是手指放在摄像头上之后，程序绘制出的心率图：


image

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heartrate's Issues

简化部分运算

ImageProcessing第58行59行代码的本意，应该就是取出'r'高八位的值，那么是不是可以不用进行这么繁琐的运算，可以将代码简化为：

int red2 = r >> 10;

还是说该公式有其他什么意义，我没有理解透彻

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