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Panoramic video quality evaluation method

A technology for panoramic video and quality evaluation, applied in TV, electrical components, image communication, etc., can solve problems such as dynamic changes

Active Publication Date: 2020-01-14
仪学科技(广州)有限公司
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Problems solved by technology

However, the quality of experience (QoE) of panoramic video will change dynamically due to compression distortion and low resolution, so it is necessary to evaluate the quality of distorted panoramic video

Method used

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] A kind of panorama video quality evaluation method that the present invention proposes, its overall realization block diagram is as follows figure 1 As 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; set the uth frame group in the original panoramic video t frames of panoramic images are denoted as Record the t-th frame panoramic image in the u-th frame group in the panoramic video to be evaluated as Among them, both u and t are positive integers, the initial values ​​of u and t are both 1, 1≤u≤U, U is the total number of frame groups contained in the original panoramic video, and the value of U depends on the ...

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Abstract

The invention discloses a panoramic video quality evaluation method. The method comprises the following steps: dividing an original panoramic video and a panoramic video to be evaluated into a plurality of frame groups; projecting the frame groups to six planes of the cube by adopting a cube projection method; calculating spatial domain similarity and frequency domain similarity of each frame group and each projection plane; according to the spatial domain similarity and the frequency domain similarity of all the frame groups and all the projection surfaces, and obtaining the objective evaluation value of the panoramic video to be evaluated through fusion. Complex viewport prediction is avoided through cubic projection, the extracted spatial domain and time domain features have high stability and can well reflect the quality change condition of the panoramic video, and therefore the correlation between the objective evaluation result and subjective perception is effectively improved.

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° field of view (FOV). With the development of head-mounted display devices, immersive and even interactive visual experience can be realized through panoramic video. However, the quality of experience (QoE) of panoramic video will change dynamically due to compression distortion and low resolution, so it is necessary to evaluate the quality of distorted panoramic video. Existing panoramic video quality assessment methods are mainly based on traditional 2D image and video quality assessment methods, for example, based on sphere-based peak signal-to-noise ratio (S-PSNR), PSNR is calculated based on uniform sampling points on the sphere, rather than rectangular mapping pixels. For panor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
CPCH04N17/00
Inventor 邵枫柴雄力
Owner 仪学科技(广州)有限公司
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