A Method for Panoramic Video Quality Evaluation

A panoramic video and quality evaluation technology, applied in TV, electrical components, image communication, etc., can solve problems such as dynamic changes, and achieve the effects of improving correlation, avoiding viewport prediction, and strong stability

CN110691236BActive Publication Date: 2021-05-07仪学科技(广州)有限公司
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-05-07

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a panoramic video quality evaluation method, which divides the original panoramic video and the panoramic video to be evaluated into several frame groups, and uses a cube projection method to project them on six planes of the cube, and then calculates the and the spatial similarity and frequency domain similarity of each projection surface, and according to the spatial similarity and frequency domain similarity of all frame groups and all projection surfaces, the objective evaluation value of the panoramic video to be evaluated is obtained by fusion, because the cube projection avoids The complex viewport prediction is achieved, and the extracted spatial and temporal features have strong stability and can better reflect the quality changes of panoramic videos, thus effectively improving the correlation between objective evaluation results and subjective perception .
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a video quality evaluation technology, in particular to a panoramic video quality evaluation method. Background technique

[0002] Panoramic video is an important development direction of virtual reality (VR), which can provide people with a 360° receptive field (FOV). With the development of head-mounted display devices, immersive and even interactive visual experiences can be achieved through panoramic video. However, the quality of experience (QoE) of panoramic videos changes dynamically due to compression distortion and low resolution, so it is necessary to evaluate the quality of distorted panoramic videos. Existing panoramic video quality assessment methods are mainly based on traditional 2D image and video quality assessment methods, such as sphere-based peak signal-to-noise ratio (S-PSNR), which calculates PSNR based on uniform sampling points on a sphere instead of a rectangular map. pixel. For panoramic video, how ...

Examples

Embodiment Construction

[0033] The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

[0034] The overall implementation block diagram of a panoramic video quality evaluation method proposed by the present invention is as follows: figure 1 shown, it includes the following steps:

[0035] Step 1: Set the original panoramic video to be composed of panoramic images of several frame groups, and set the panoramic video to be evaluated as the distorted panoramic video corresponding to the original panoramic video; The t-frame panoramic image is denoted as Denote the t-th panoramic image in the u-th frame group in the panoramic video to be evaluated as Among them, u and t are both positive integers, the initial values ​​of u and t are both 1, 1≤u≤U, U is the total number of frame groups included in the original panoramic video, and the value of U is determined according to the actual panoramic video , 1≤t≤T, T is the total number...