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Foveation Pipeline for 360° Video-Based Telemedicine.

Muhammad Firdaus Syawaludin¹, Myungho Lee¹, Jae-In Hwang¹

¹Imaging Media Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.

Sensors (Basel, Switzerland)

|April 23, 2020

Summary

This summary is machine-generated.

This study introduces a novel foveated imaging pipeline for virtual reality head-mounted displays (HMDs), integrating pan-tilt-zoom (PTZ) and omnidirectional cameras. The pipeline enhances telemedicine by improving angular resolution in the foveal region for a more immersive visual experience.

Keywords:

HMD foveation multi-resolution telemedicine

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Area of Science:

Computer Vision
Virtual Reality
Telemedicine

Background:

Pan-tilt-zoom (PTZ) and omnidirectional cameras are used in telemedicine but often displayed separately on 2D screens.
Existing foveated imaging techniques struggle to unify high-resolution PTZ and wide-field omnidirectional views effectively on 2D displays.

Purpose of the Study:

To develop a foveated imaging pipeline for virtual reality head-mounted displays (HMDs) that integrates PTZ and omnidirectional camera feeds.
To enable real-time rendering of a unified, foveated image, enhancing visual fidelity in telemedicine applications.

Main Methods:

A pipeline with parallel processes for image integration parameter estimation and real-time rendering was developed.
A control mechanism was implemented for dynamic foveal region placement and zoom control.
The system was evaluated for frame rate and angular resolution improvements on an HMD.

Main Results:

The pipeline achieved an average frame rate of 17 frames per second when rendering foveated views on an HMD.
Angular resolution was improved in the foveal region compared to the omnidirectional camera view.
Resolution improvement diminished at zoom levels of 8x and higher.

Conclusions:

The proposed foveated imaging pipeline effectively integrates PTZ and omnidirectional cameras for HMDs, offering improved visual resolution in telemedicine.
Further research is needed to optimize performance at higher zoom levels and explore other potential improvements.