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Method for predicting field of view of user based on deep learning

A deep learning and user-friendly technology, applied in the field of computer vision and deep learning, can solve problems affecting the accuracy of video features, embarrassing field of view prediction, high bandwidth and low latency that have not been resolved, and achieve improved VR experience and low bandwidth costs , Reduce the effect of transmission delay

Active Publication Date: 2018-09-04
NANJING UNIV
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Problems solved by technology

[0002] At present, many innovative applications have appeared in the VR industry, and VR is also gradually entering mobile terminals such as mobile phones, but the problems of high bandwidth and low latency required for smooth VR playback have not been resolved.
In addition, isometric mapping etc. make the distortion of objects in the panorama very obvious, thus also affecting the accuracy of the obtained video features, which is an embarrassing problem for field of view prediction

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  • Method for predicting field of view of user based on deep learning
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  • Method for predicting field of view of user based on deep learning

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Embodiment Construction

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation method of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] A method of predicting the user's field of view based on deep learning in this embodiment, the steps are as follows:

[0022] (1) Map the panoramic video from the spherical surface to the 6 faces of the cube inscribed on the sphere, and obtain the video corresponding to the 6 faces of the cube from the 2D panoramic video. Number the faces of the cube from 1 to 6, and expand them in sequence from 1 to 6 (see attached image 3 ).

[0023] (2) Use the optical flow algorithm to generate the dynamic feature sequence diagram of the six faces of the cube corresponding to the video, and then use the coordinate transformation relationship from the cube to the 2D plane and its numbering sequence to synthesize the panoramic dynamic featu...

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Abstract

The invention discloses a method for predicting the field of view of a user based on deep learning, which comprises the steps of (1) mapping a panoramic video from a spherical surface to six surfacesof a sphere inscribed cube to obtain videos corresponding to the six surfaces, respectively generating a dynamic feature sequence diagram and a saliency sequence diagram of the videos, and performingblocking and numbering; (2) judging the video content viewpoint switching intensity w according to dynamic features; (3) recording the head turning of the user by a helmet, and processing the recordedhead turning; (4) selecting a prediction network according to the size of the w value, obtaining the field of view of the user in the last n video frames by network prediction, and processing to obtain the number of a video block overlapped with the field of view; and (5) rendering the transmitting the video block obtained by prediction, and repeating the steps until the final n frames are predicted. The method disclosed by the invention reduces influences imposed on input video features by the panorama distortion, and pre-judgment grading of the video information is added at the same time, so that the field of view of the user when watching video in a VR HMD (Head Mount Display) can be predicted with high accuracy.

Description

technical field [0001] The invention relates to the fields of computer vision and deep learning, in particular to a method for predicting a user's field of view based on deep learning. Background technique [0002] At present, many innovative applications have appeared in the VR industry, and VR is gradually entering mobile terminals such as mobile phones. However, the problems of high bandwidth and low latency required for smooth VR playback have not been resolved. Human perception requires smooth and accurate movement of vision, so unsmooth playback and high delay may cause VR users to experience symptoms such as nausea and dizziness, seriously affecting the user's immersive experience. Adding field of view prediction during VR video rendering and transmission can reduce the amount of transmitted data, thereby reducing the rendering and transmission time and effectively reducing transmission delay. [0003] LSTM (Long Short Term Memory) network is a special type of recurr...

Claims

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Application Information

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IPC IPC(8): G06T7/246G06K9/00G06F3/01
CPCG06F3/012G06T7/246G06T2207/10016G06V20/40
Inventor 蒲志远沈秋郭佩瑶马展
Owner NANJING UNIV
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