Respiratory effect measuring method and system

A technology of breathing effect and measurement method, applied in the field of measurement method and system of breathing effect, can solve the problems of effective comparison, simple and crude subjective comparison test method, general accuracy of test results, etc., so as to improve accuracy and achieve objective evaluation. Effect

CN109982069AActive Publication Date: 2019-07-05ZHEJIANG UNIVIEW TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-07-05

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Abstract

The invention provides a respiratory effect measurement method and system, and relates to the technical field of image quality testing, and the method comprises the steps: collecting a video, carryingout the scene classification of the video according to the image complexity, and obtaining a plurality of test scenes; obtaining an image of each test scene, and calculating definition information ofthe image by adopting a definition algorithm; evaluating the respiratory effect of the test scene according to the definition information to obtain a respiratory effect evaluation value; and carryingout weighted calculation on the respiratory effect evaluation values corresponding to the plurality of test scenes according to a preset weight to obtain a respiratory effect comprehensive evaluationvalue. According to the method, objective evaluation of the respiratory effect can be realized, and the accuracy, repeatability and economy of the respiratory effect test are improved.
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Description

technical field

[0001] The invention relates to the technical field of image quality testing, in particular to a method and system for measuring breathing effects. Background technique

[0002] The objectification of image quality testing has always been one of the important propositions of camera function testing. Breathing effect, as an image feature introduced by the encoding algorithm, has an important impact on the stability of image performance, and has been concerned by customers for a long time. Most of the previous evaluations were highly subjective evaluations, such as obvious / not obvious, serious / not serious, subject to the subjective impressions of different testers, and the test results cannot be compared longitudinally between different test samples over time, so the evaluation is inaccurate And time-consuming and laborious. It is increasingly urgent to develop an objective test method that can be used to test the breathing effect.

[0003] At present, the m...

Examples

Embodiment 1

[0048] figure 1 It is a flow chart of the method for measuring the breathing effect provided by Embodiment 1 of the present invention.

[0049] In the H264 protocol, it is defined that the I frame is the complete encoding of the original picture, and the P frame is the encoding that only includes the difference part generated by referring to the previous I frame. The reason for the breathing effect is that there is a difference in the definition of the I frame and the P frame, that is, the definition of the last P frame of an I frame group is higher than the initial I frame of the next I frame group, resulting in a sudden change in the picture definition, which in turn causes The picture shakes, which is the so-called breathing effect. For this reason, an objective index for measuring the breathing effect can be obtained by comparing the sharpness difference between the I-frame picture and the P-frame picture.

[0050] refer to figure 1 , the measurement method of breathing...

Embodiment 2

[0071] image 3 It is a schematic diagram of the measurement system of the breathing effect provided by the second embodiment of the present invention.

[0072] An embodiment of the present invention also provides a measurement system for the breathing effect, which is used to implement the above method for measuring the breathing effect. refer to image 3 , the measurement system of breathing effect includes the following units:

[0073] The scene distinguishing unit 110 is used to collect the video, and classify the video according to the complexity of the picture to obtain a plurality of test scenes;

[0074] A sharpness calculation unit 120, configured to acquire an image of each test scene, and calculate the sharpness information of the image using a sharpness algorithm;

[0075] The first evaluation unit 130 is configured to evaluate the breathing effect of the test scene according to the clarity information, and obtain a breathing effect evaluation value;

[0076] T...

Embodiment 3

[0089] Figure 4 It is a schematic diagram of the measuring device for the breathing effect provided by the third embodiment of the present invention.

[0090] refer to Figure 4 , the embodiment of the present invention also provides a breathing effect measuring device 200, comprising: a processor 210, a memory 220, a bus 230 and a communication interface 240, the processor 210, the communication interface 240 and the memory 220 are connected through the bus 230; Executable modules, such as computer programs, stored in the execution memory 220 .

[0091]Wherein, the memory 220 may include a high-speed random access memory (RAM, Random Access Memory), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 240 (which may be wired or wireless), and the Internet, wide area net...