PPGI-Toolbox

A MATLAB toolbox for Photoplethysmography Imaging

by Christian S. Pilz, Aachen, 2019

Example Data

The example data can be download by the following link:
https://www.dropbox.com/s/vv6ethy5az16wt4/example_data.mat?dl=0

Place the example_data.mat file into ./media/data/ folder.
The example_data.mat contains the reference finger pulse oximeter waveform (ppg) and the color image data of a face finder detection result in the rgb cell.

Algorithms

• Channel Mean (G) [7,8]
• Spatial Subspace Rotation (SSR) [5]
• Algorithmic Principles of Remote PPG (POS)[3]
• Local Group Invariance (LGI) [1,2]
• Diffusion Process (DP) [4]
• Riemannian-PPGI (SH) [1]

Evaluation

• Correlation
• Bland-Altman
• RMSE/ MSE
• SNR [6]

Databases

• UBFC-RPPG
• LGI Multi Session [1,2]
• VIPL-HR

References

1. Christian S. Pilz, Vladimir Blazek, Steffen Leonhardt, On the Vector Space in Photoplethysmography Imaging, arXiv:1903.03316 [cs.CV], 2019
2. Christian S. Pilz, S. Zaunseder, J. Krajewski, V. Blazek, Local Group Invariance for Heart Rate Estimation from Face Videos in the Wild, The IEEE Conference on Computer Vision and Pattern Recognition (CVPR) Workshops, pp.1254-1262, Salt Lake City, 2018
3. Wang, W., den Brinker, A. C., Stuijk, S., & de Haan, G. (2017). Algorithmic principles of remote PPG. IEEE Transactions on Biomedical Engineering, 64(7), 1479-1491
4. Christian S. Pilz, Jarek Krajewski, Vladimir Blazek. On the Diffusion Process for Heart Rate Estimation from Face Videos under Realistic Conditions. Pattern Recognition: 39th German Conference, GCPR 2017, Basel, Switzerland. Proceedings (Lecture Notes in Computer Science), Springer, 2017
5. W. Wang, S. Stuijk and G. de Haan, "A Novel Algorithm for Remote Photoplethysmography: Spatial Subspace Rotation," in IEEE Transactions on Biomedical Engineering, vol. 63, no. 9, pp. 1974-1984, Sept. 2016.
6. De Haan, G., & Jeanne, V. (2013). Robust pulse rate from chrominance-based rPPG. IEEE Transactions on Biomedical Engineering, 60(10), 2878-2886
7. Verkruysse, W., Svaasand, L. O., & Nelson, J. S. (2008). Remote plethysmographic imaging using ambient light. Optics express, 16(26), 21434-21445
8. M. Hülsbusch. A functional imaging technique for opto-electronic assessment of skin perfusion. PhD thesis, RWTH Aachen University, 2008.

License

Results

• UBFC-RPPG:

Pearson	RMSE

• LGI Multi Session:

Pearson	RMSE

Pearson	RMSE

Pearson	RMSE

Pearson	RMSE

• VIPL-HR:

Pearson	RMSE