

Evangelos Alexiou
evangelos.alexiou@epfl.ch


Below we provide information related to the quality scores that were obtained for the stimuli under assessment, for each experiment that was conducted in the framework of [1]:

## Experiment 1:
- Subjective scores of each stimulus per subjID (exp1_subj.csv). The first 20 subjIDs correspond to subjects from EPFL and the last 20 refer to subjects from UNB.
- Objective scores of each stimulus per objective metric (exp1_obj.csv). Moreover, a score per view is given for every projection-based metric (exp1_obj_projection-based_per_cam.csv). The generation of the views was performed using the pointCloudViewGrabber tool of our renderer [2].
- Bitrates of each stimulus (exp1_bitrates.csv). The number of input and output points, the total number of bytes required for all attributes (i.e., geometry, color, occupancy), and the total number of bits divided by the number of input points (bpp) are provided per stimulus.

## Experiment 2:
- Subjective scores per subject (exp2_subj.csv). The 25 subjects were recruited in UNB.

## Experiment 3:
- Subjective scores per subject (exp3_subj.csv). The 25 subjects were recruited in EPFL.

For more details, please refer to [1].


## References

[1] Alexiou, E., Viola, I., Borges, T., Fonseca, T., De Queiroz, R., & Ebrahimi, T. (2019). A comprehensive study of the rate-distortion performance in MPEG point cloud compression. APSIPA Transactions on Signal and Information Processing, 8, E27. doi:10.1017/ATSIP.2019.20

[2] E. Alexiou, "Point cloud web renderer", 2019, GitHub repository, https://github.com/mmspg/point-cloud-web-renderer
