Some problems about HR detector

[RijunLiao]

Dear Sir, I am very interested in your work and many thanks for your work. Could I ask some questions. Thank you!

1. I have the same problem as https://github.com/habom2310/Heart-rate-measurement-using-camera/issues/3, but I can not find L > 10 in line 92 in process.py and modify. =========log========= Start video 24.0 1574931554.28 /home/liao/.local/lib/python2.7/site-packages/numpy/core/fromnumeric.py:3118: RuntimeWarning: Mean of empty slice. out=out, **kwargs) /home/liao/.local/lib/python2.7/site-packages/numpy/core/_methods.py:85: RuntimeWarning: invalid value encountered in double_scalars ret = ret.dtype.type(ret / rcount) End of video Stop video 63.5599291325 Traceback (most recent call last): File "GUI.py", line 287, in run self.main_loop() File "GUI.py", line 236, in main_loop self.process.run() File "/home/liao/Heart-rate-measurement-using-camera-master/process.py", line 39, in run frame, face_frame, ROI1, ROI2, status, mask = self.fd.face_detect(self.frame_in) TypeError: 'NoneType' object is not iterable Stop video =========log End=========
2. I cannot see the video and Signal until I click the "stop" botton, I mean I can not see the image in realtime.
3. Does the face need to fix in the same postion? Could detect its HR when face is moving, or just Left Face, or Right Face?
4. How to show the HR? What are the relationship between Signal, FFT and HR?