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Panoramic video transmission method based on feature point detection

A technology of feature point detection and panoramic video, applied in the field of panoramic video, can solve the problems of not being the highest definition and the degradation of user viewing experience

Active Publication Date: 2021-06-04
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In actual situations, due to the existence of transmission delay, after adopting the above transmission strategy, there will always be content that is not the highest definition in the user's field of vision, thereby degrading the user's viewing experience

Method used

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  • Panoramic video transmission method based on feature point detection
  • Panoramic video transmission method based on feature point detection
  • Panoramic video transmission method based on feature point detection

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] figure 1 It is a flow chart of the present invention. When a user watches a panoramic video, as time goes by, he will see frame by frame, and analyze each frame.

[0033] (1) Obtain the corresponding field of view according to the field of view of the client, see Figure 4 shown.

[0034] (2) Divide the user's field of view into several areas of equal area according to requirements (see (*) in step (4) below for specific operations).

[0035] (3) Utilize the FAST feature point detection algorithm to carry out feature point detection for each region;

[0036] When a frame is obtained, the FAST algorithm is used to detect the feature points, and the process is as follows figure 2 As shown, the specific steps are:

[0037] 1) First, for a point P, take a pixel circle with a radius of 3 centered on point P, and define the above pixel points fro...

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Abstract

The invention belongs to the technical field of panoramic video transmission, in particular to a panoramic video transmission method based on feature point detection. The method of the present invention includes: obtaining the corresponding field of view according to the field of view of the user terminal; dividing the field of view of the user into several areas with equal areas according to the requirements; using the FAST feature point detection algorithm to detect feature points in each area; obtaining each After comparing the number of feature points in each area, the area with the largest number of feature points is obtained; record the position of the center of this area, and feed it back to the server, and the server will use it as the center of the user's field of vision, select the corresponding video content and Corresponding to the definition, sent to the user. The invention can greatly improve the user's viewing experience.

Description

technical field [0001] The invention belongs to the technical field of panoramic video, and in particular relates to a transmission method of panoramic video. Background technique [0002] In the field of panoramic video, there are two general directions, one is the projection of panoramic video, and the other is the transmission of panoramic video. For the projection of panoramic video, it is necessary to project the original panoramic video onto a rectangular plane to meet the current coding standards; the client also needs to re-project the obtained flat video onto the spherical surface as evenly as possible to improve the user's performance. viewing experience. For the transmission of panoramic video, since panoramic video has more information than ordinary video, it will occupy more bandwidth, which puts huge pressure on existing technical conditions. Therefore, in the process of panoramic video transmission, the video content is classified and processed. In order to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/218H04N21/44H04N21/4402H04N21/658G06K9/46G06K9/00
CPCH04N21/21805H04N21/658H04N21/4402H04N21/44008G06V20/46G06V10/462
Inventor 范益波杨吉喆周思远孟子皓池俊曾晓洋
Owner FUDAN UNIV