Graphics Processor Foveated Rendering Pipeline
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Solution Overview
Problem
Current graphics processing systems face inefficiencies in foveated rendering for virtual reality applications, particularly due to high latency and the inability to dynamically adjust the fovea region and resolution, leading to suboptimal user experience and increased computational burden.
Innovation Solution
A graphics processing system with a pipeline that includes an initial and further processing stage, where gaze-tracking data is used to identify sub-regions of the scene, allowing for rendering at different resolutions, thereby reducing computational load and improving latency by focusing high-resolution processing on the user's gaze area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the entire image is rendered at high resolution, then visual quality is improved, but rendering time and computational burden increase
Solution Approach 1:
The patent applies local quality by rendering different regions of the image at different resolutions. The central region corresponding to the user's foveal vision is rendered at high resolution to maintain visual quality, while peripheral regions are rendered at lower resolution to reduce computational burden and rendering time.
Solution Approach 2:
The patent segments the image into multiple regions based on their importance to the user's vision. The image is divided into a central high-priority region and peripheral low-priority regions, allowing differential rendering strategies to be applied to each segment, thereby optimizing the balance between quality and speed.
2Productivity
If foveated rendering is implemented without dynamic adjustment, then computational burden is reduced, but user experience deteriorates due to latency
Solution Approach 1:
The patent implements dynamic adjustment of the foveal region by continuously tracking the user's eye movements and updating the high-resolution rendering area in real-time. This dynamic approach ensures that the high-resolution region always corresponds to where the user is actually looking, minimizing perceived latency and maintaining natural user experience while preserving rendering efficiency.
Solution Approach 2:
The system uses eye-tracking feedback to dynamically adjust the foveal region. The eye-tracking data provides continuous feedback about the user's gaze position, which is used to update the high-resolution rendering area, creating a closed-loop system that adapts to user behavior and minimizes latency.
3Device complexity
If the fovea region is fixed, then processing is simplified, but adaptability to user movement is reduced
Solution Approach 1:
The patent makes the fovea region dynamic by continuously adjusting its position and size based on real-time eye-tracking data. This allows the system to adapt to user movements and gaze changes while maintaining relatively simple processing through efficient region identification and selective rendering updates.
Data Source
AI summary
A graphics processing system includes a graphics processing pipeline including at least an initial processing stage and a further processing stage. Data for a scene at a first resolution and data for the scene at a second resolution are processed in the initial processing stage. After processing data for the scene at the first and second resolutions in the initial processing stage, gaze-tracking data relating to a current positioning of at least one eye of a user of a virtual reality user device is received. At least one sub-region of the scene is identified from the gaze-tracking data. Data for the scene at the first resolution and only data corresponding to the identified at least one sub-region of the scene at the second resolution are processed in the further processing stage. The scene is rendered by combining the data for the scene processed in the further processing stage.