HRV assessment details for UBFC-RPPG

[ZhiXinChasingLight]

Hello! I would like to ask you about the HRV evaluation details of UBFC-RPPG in Table 2. How did you transform the bvp label and rppg into various HRV indicators for evaluation? Is there code for that?

[zhaodongsun]

Please check the HRV code. https://github.com/zhaodongsun/contrast-phys/blob/master/hrv.py

[ZhiXinChasingLight]

Please check the HRV code. https://github.com/zhaodongsun/contrast-phys/blob/master/hrv.py

Thank you for your answer, but I don't see the code for calculating respiration frequency in hrv.py

[zhaodongsun]

Hi, the HRV code can provide high frequency (HF), which is the respiration rate.

[ZhiXinChasingLight]

Hi, the HRV code can provide high frequency (HF), which is the respiration rate.

There are performance evaluations of HF, LF, LF/HF and RF in table2. What is the difference between HF and RF?

[zhaodongsun]

Hi, HF features of HRV are one of the RF measurement methods. RF can also be measured from other rPPG features like amplitude. You can refer to the paper below for RF measurement. However, our paper uses HF to measure RF.

Modulation Model of the Photoplethysmography Signal for Vital Sign Extraction

[zhaodongsun]

Please note that hf_f and hfnu in the code are different. hf_f is RF. hfnu is the high-frequency power.