![]() Spatial orientation is an important skill in structural cardiac imaging. The results show that the proposed approach reduces the rendering errors significantly in terms of the mean-squared error between the rendered and reference images, especially combined with initial head motion prediction. We perform controlled experiments using artificial camera traces to evaluate our approach. In detail, we use the homography between the initial head pose when the image is rendered at the server and the latest available head pose of the user at the client. We present a planar homography-based approach that compensates minor changes of the user’s head pose due to the interaction latency by warping the transmitted image on the client-side, just before it is sent to the display. A drawback of remote rendering is the significant increase of interaction latency that can degrade the user experience. Remote rendering offloads complex rendering operations to a powerful server and provides the final result to the end device as a 2D video stream. Rendering multiple high-quality volumetric videos is still a challenge for today’s mobile devices. By applying our framework to a stereoscopic display, we confirmed that it could display a high-fidelity appearance on full-HD stereo videos at 35-40 frames-per-second (fps), according to the user's head motion. Neural rendering on the server receives the client's head posture and generates a novel-view image with realistic appearance reproduction, which is streamed onto the client's display. Our NeARportation framework combines server-client bidirectional communication and neural rendering to resolve these trade-offs. There is no framework that could resolve these trade-offs and easily provide a photo-realistic appearance in real-time. Furthermore, even with photo-realistic appearance measurements, there is a trade-off between rendering quality and framerate. However, photo-realistic photogrammetry requires a dedicated measurement environment, and there is a trade-off between measurement cost and quality. Recent developments in photogrammetry have facilitated the incorporation of real objects into virtual space. While the presentation of photo-realistic appearance plays a major role in immersion in an augmented virtuality environment, displaying the photo-realistic appearance of real objects remains a challenging problem.
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