Wednesday, June 20, 2018

Daqri on Importance of Latency in AR/VR Imaging

Daqri Chief Scientist Daniel Wagner publishes an article "Motion to Photon Latency in AR and VR applications:"

Daqri tells about its latency optimization achievements: "Overall, what is the final latency we can achieve with such a system? The answer is: It depends. If we consider rendering using the latest 6DOF pose estimates as the last step in our pipeline that produces fully correct augmentations then achieving a latency of ~17ms is our best-case scenario.

However, late warping can correct most noticeable artefacts, so it makes sense to treat it as valid part of the pipeline. Without using forward prediction for late warping, we can achieve a physical latency of 4 milliseconds per color channel in our example system. However, 4 milliseconds is such a short length of time, making forward prediction almost perfect and pushing perceived latency towards zero. Further, we could actually predict beyond 4ms into the future to achieve a negative perceived latency. However, negative latency is just as unpleasant as positive latency, so this would not make sense for our scenario.

1 comment:

  1. Someone needs to check their math before publishing a slide. 15+25+17+1=58, not 48.


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