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Panoramic video evaluation method and system based on multilevel quality factors

A technology of quality factor and panoramic video, applied in the field of multimedia

Active Publication Date: 2017-12-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] The idea of ​​the present invention is to calculate multiple quality factors based on multi-level regions of interest to deal with the problem that important areas in panoramic videos have a greater impact on video quality; Subjective data learned to deal with the subjective initiative of panoramic video users

Method used

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  • Panoramic video evaluation method and system based on multilevel quality factors
  • Panoramic video evaluation method and system based on multilevel quality factors
  • Panoramic video evaluation method and system based on multilevel quality factors

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Embodiment 1

[0063] This embodiment is to illustrate the method and system of the present invention based on two segments of 4K resolution lossless panoramic video concert.mp4 and lossy panoramic video concert_3M.mp4 as examples.

[0064] figure 1 It is a multi-level quality factor-based panoramic video evaluation method and system of the present invention, which is a block diagram of a multi-level quality factor-based panoramic video quality evaluation system.

[0065] from figure 1 It can be seen from the figure that the system inputs the reference video and damaged video into the panoramic video input module for decoding processing, and then sends them to the region of interest extraction module to extract the regions of interest in low-level, middle-level, high-level, time-domain and mapping levels , and then based on these region-of-interest matrices, calculate the low-level, middle-level, high-level, time-domain level and mapping level quality factor sets of the panoramic image pair...

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Abstract

The invention relates to a panoramic video evaluation method and system based on multilevel quality factors, and belongs to the field of multimedia technology. According to the panoramic video evaluation method and system, a segment of lossless panoramic video and a segment of damaged video having the same contents are input, a quality evaluation result of the damaged video is output, and automatic evaluation of the damaged video is achieved; and the idea is to calculate a plurality of quality factors based on a multilevel interested area so as to make response to the problem that an important area in the panoramic video has relatively large influence on the video quality; and then fuse the multilevel quality factors via a fusion model, the model parameters are learnt by subjective data so as to make response to the subjective initiative of the user of the panoramic video. The method is suitable for the quality evaluation of the panoramic video; the influence of the multilevel interested area to the video quality is considered, the obtained quality evaluation value of the damaged video is more consistent with the evaluation result of a subjective experience, and thus the method is more suitable for automatic evaluation of the quality of the panoramic video.

Description

technical field [0001] The invention relates to a panoramic video quality evaluation method, in particular to a multi-level quality factor-based panoramic video evaluation method and system, and belongs to the field of multimedia technology. Background technique [0002] With the development of virtual reality (Virtual Reality, referred to as VR) technology, ordinary flat video is gradually being replaced by 360-degree panoramic video. Panoramic video refers to a fixed viewing point that provides a 360-degree horizontal range and a 180-degree vertical range for free viewing, which can give VR users a stronger sense of immersion and a more immersive experience. With the popularity of this new type of multimedia service, the user experience quality of panoramic video is of great significance to the development of key technologies in virtual reality systems and the optimization of transmission networks. However, panoramic video quality assessment is a complex issue, because co...

Claims

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Application Information

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IPC IPC(8): H04N17/00H04N5/265
CPCH04N5/265H04N17/00H04N2017/008
Inventor 王晶杨舒费泽松张博
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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