Cloud Based Image/Video Coding: Improving efficiency and QoE

The work carried out in this WP includes scientific and technological research tasks carried out in order to design and implement a cloud-based holographic and plenotic coding method, which allows a good performance of the encoder in relation to encoding time, throughput and QoE.

Team & Collaborators

• Manuela Pereira | WP leader
• António Pinheiro
• Elsa Fonseca
• Paulo Fiadeiro

Publications

Journal articles

• Amirpourazarian, H., Pinheiro, A., Fonseca, E., Ghanbari, M., & Pereira, M. (2021). Quality evaluation of holographic images coded with standard codecs. IEEE Transactions on Multimedia, preprint (***)
• Bernardo, M., Fonseca, E., Pinheiro, A., Fiadeiro, P., & Pereira, M. (2021). Efficient coding of experimental holograms using speckle denoising, Signal Processing: Image Communication, 96, 116306.

(***) Article published in a top 10% most cited journal of the respective field. 

Conference articles

• Amirpour, H., Pinheiro, A., Pereira, M., & Ghanbari, M. (2021). Performance comparison of video encoders in light field image compression. In IS&T International Symposium on Electronic Imaging 2021.
• Amirpour, H., Pinheiro, A., Fonseca, E., Ghanbari, M., & Pereira, M. (2020). Quality Evaluation Of Digital Holographic Data Encoded On The Object Plane Using State Of The Art Codecs. 2020 IEEE International Conference on Image Processing (ICIP), pp. 3453-3457.

Oral Presentations

• H. Amirpour, A. Pinheiro, E. Fonseca, M. Ghanbari, M. Pereira, (2019) “Perceptual evaluation of state-of-the-art codecs applied to digital holographic data” 84th JPEG meeting, JPEG Pleno Holography, JPEG Pleno  2019. 
• Presentation Manuela Pereira, Elsa Fonseca, Paulo Fiadeiro, Marco Bernardo, Hadi Amirpour, António Pinheiro (2019) “Quality Assessment”, JPEG Pleno Holography Workshop’19 March, 2019, Geneva, Switzerland 

Related publications

• Amirpour, H., Pinheiro, A., Pereira, M., & Ghanbari, M. (to appear) Fast and Efficient Lenslet Image Compression (submitted for publication)
• Fonseca, E., Fiadeiro, P. T., Bernardo, M. V., Pinheiro, A., & Pereira, M. (2019). Assessment of speckle denoising filters for digital holography using subjective and objective evaluation models. In Applied Optics, 58(34), G282-G292.
• Amirpour, H., Ghanbari, M., Pinheiro, A., & Pereira, M. (2019). Motion estimation with chessboard pattern prediction strategy. In Multimedia Tools and Applications, 78, 21785–21804
• Fonseca, E., Fiadeiro, P., Hajihashemi, V., Bernardo, M., Pinheiro, A., & Pereira, M. (2019). Perceptual evaluation of speckle noise reduction techniques for phase shifting holograms. In Eleventh International Conference on Quality of Multimedia Experience (pp. 1-6). IEEE.
• da Silva Cruz, L. A., Dumić, E., Alexiou, E., Prazeres, J., Duarte, R., Pereira, M., Pinheiro, A., & Ebrahimi, T. (2019, June). Point cloud quality evaluation: Towards a definition for test conditions. In Eleventh International Conference on Quality of Multimedia Experience (pp. 1-6). IEEE.
• Amirpour, H., Pinheiro, A. M., Pereira, M., & Ghanbari, M. (2019, May). Reliability of the Most Common Objective Metrics for Light Field Quality Assessment. In ICASSP 2019 – IEEE International Conference on Acoustics, Speech and Signal Processing (pp. 2402-2406). IEEE.
• Bernardo, M. V., Fonseca, E., Pinheiro, A. M., Fiadeiro, P. T., & Pereira, M. (2019). Speckle Reduction for Efficient Coding of Experimental Holograms. In 2019 Data Compression Conference (pp. 557-557). IEEE.
• Amirpour, H., Pinheiro, A., Pereira, M., Lopes, F., & Ghanbari, M. (2019). Light Field Image Compression with Random Access. In 2019 Data Compression Conference (pp. 553-553). IEEE.
• Amirpour, H., Pinheiro, A., Pereira, M., & Ghanbari, M. (2019). Fast Depth Decision in Light Field Compression. In 2019 Data Compression Conference (pp. 552-552). IEEE.