Non-reference evaluation method for Motion Jpeg2000 video objective quality
An objective quality and video technology, applied in the field of digital video, can solve the problems that the objective quality assessment method cannot work, cannot obtain the original video sequence, etc., and achieve the effect of wide application prospects
Inactive Publication Date: 2010-10-06
ZHEJIANG UNIV
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Problems solved by technology
In these applications, the original video sequence cannot be obtained in many cases, and traditional objective quality assessment methods (PSNR and MSE, etc.) cannot play a role
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[0034] A no-reference evaluation method using the Motion Jpeg2000 video objective quality of the present invention will be described in detail below through an embodiment in conjunction with the accompanying drawings.
[0035] Such as figure 1 Shown, a kind of no reference evaluation method that adopts Motion Jpeg2000 video objective quality of the present invention, comprises:
[0036] (1) Input Motion Jpeg2000 video and decode it to obtain the restored image after decoding, Motion Jpeg2000 video is referred to as MJ2 video;
[0037] Among them, a standard MJ2 code stream parser is used for MJ2 video decoding.
[0038] (2) Feature extraction is performed on each frame of restored image to obtain the global features of each frame of restored image.
[0039] (3) Substitute the global features of each frame of the restored image into a trained function model, and output the frame-level objective quality of each frame of the restored image.
[0040] (4) Calculate the weighting...
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The present invention discloses a non-reference evaluating method of objective quality of Motion Jpeg2000 video. The non-reference evaluating method comprises the following steps: 1) inputting an MJ2 video and decoding the MJ2 video for obtaining the restored image after decoding; 2) executing characteristic extracting to each frame of restored image for obtaining the global characteristic of each frame of restored image; 3) substituting the global characteristic of each frame of restored image into a function model, and outputting the frame-grade objective quality of each frame of restored image by the function model after a training state and a testing state; and 4) calculating a weighting coefficient function for obtaining the weighting coefficient of restored image, weighting the frame-grade objective quality of restored image for obtaining the sequence-grade evaluating quality of restored image. The method of the invention can accurately reflect the objective quality of MJ2 videoimage at the state that an original video sequence is in short. The method can be used for adjusting coding / decoding and signal channel parameter in 3G wireless network and IP video system, monitors the real-time transmission quality of image and has a wide application prospect.
Description
technical field [0001] The invention belongs to the technical field of digital video, and in particular relates to a method for evaluating the objective quality of a Motion Jpeg2000 video without reference. Background technique [0002] In multimedia communication systems, the most important form of media is digital video. Digital video introduces errors and information distortion (Distortion) during the processing of sampling, compression encoding, network transmission, decoding and restoration of analog video signals. Video Quality Assessment (Video Quality Assessment), as an effective means of measuring digital video distortion, is becoming more and more important. For example, in the field of video coding and decoding, the performance and parameters of the codec can be optimized according to the results of video quality evaluation, and video coding and decoding equipment that conforms to the human visual system can be designed; in the field of wireless communication, th...
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IPC IPC(8): H04N17/00
Inventor 陈耀武张桦朱威
Owner ZHEJIANG UNIV