Method for evaluating objective quality of partial reference type image

A technology of objective quality and evaluation method, applied in the field of digital video, to achieve the effect of wide application prospects

Active Publication Date: 2009-12-16
ZHEJIANG UNIV
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Problems solved by technology

However, because the acquisition of the experience curve depends on the existing objective quality evaluation method, this method can only complete the fitting with the existing objective quality evaluation results

Method used

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  • Method for evaluating objective quality of partial reference type image
  • Method for evaluating objective quality of partial reference type image
  • Method for evaluating objective quality of partial reference type image

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Embodiment Construction

[0035] Such as figure 1 As shown, a partial reference image objective quality evaluation method based on wavelet domain digital watermark of the present invention includes:

[0036] (1) At the image sending end, analyze the texture complexity of the original image to obtain the watermark embedding instruction map;

[0037] (2) At the image sending end, the quantization parameter is determined by using the quantization parameter initialization adjustment system and the quantization parameter dynamic reverse adjustment system;

[0038] (3) At the image sending end and image receiving end, carry out digital watermark embedding and extraction respectively in each wavelet sub-band image according to the watermark embedding instruction map and quantization parameters;

[0039] (4) At the image receiving end, the watermark restoration rate extracted from each wavelet sub-band image is weighted to obtain an objective image quality evaluation.

[0040] At the image sending end, the t...

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Abstract

The invention discloses a method for evaluating objective quality of a partial reference type image. The method comprises the following steps of: 1) at the image sending end, analyzing the texture complexity of the original image to obtain a watermark embedding indicator diagram; 2) at the image sending end, using a quantization parameter initialization adjusting system and a quantization parameter dynamic reverse adjusting system to determine a quantization parameter; 3) at the image sending end and the image receiving end, performing the wavelet transform of the original image to obtain wavelet self sub-band images, and according to the watermark embedding indicator diagram and the quantization parameter, embedding and extracting digital watermarks in all wavelet sub-band images; and 4) at the image receiving end, weighting the recovery rates of the watermarks extracted in the wavelet sub-band images, and obtaining the evaluation of the objective quality of the image. Under the condition of insufficient original images at the image receiving end, by the method, the objective quality of the images can be correctly reflected by using the digital watermarks hidden in the images, so that the method has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of digital video, in particular to a part-reference image objective quality evaluation method based on wavelet domain digital watermark. Background technique [0002] Digital images are widely used in multimedia products, which will cause quality loss in the process of acquisition, compression, storage and transmission. While using these multimedia products, human beings become the final recipients of digital images. Therefore, the human subjective quality evaluation (DMOS) of digital images is considered to be the most reliable. However, the process of subjective quality assessment is time-consuming and laborious, and the results are not reproducible. Therefore, scientists have done a lot of research on the objective quality evaluation methods of digital images for many years. According to the reference to the original image, the objective quality evaluation methods are divided into three types: full ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00G06T1/00
Inventor 陈耀武张桦田翔
Owner ZHEJIANG UNIV
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