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24 color card video key frame automatic localization and color difference time sequence change analysis method

A video key frame and automatic positioning technology, applied in image analysis, image enhancement, instruments, etc., can solve problems such as shooting delay, calculation waste, and shooting content without actual analysis value, so as to improve computing efficiency and reduce calculation amount Effect

Active Publication Date: 2019-02-22
易诚高科(大连)科技有限公司
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Problems solved by technology

But the disadvantage is that there are continuous multiple frames in the process of video shooting that are stable, and the calculation of the image color difference related parameters of the 24-color graphics card for each frame will not only cause shooting delays but also lead to a lot of calculation waste
At the same time, markers are required to automatically calibrate the evaluation area of ​​the 24-color card. If there is no marker, the color difference cannot be calculated or the color difference calculation will be wrong.
[0005] In the process of video shooting standard chart card, the test equipment is expected to be in the state of automatically adjusting relevant parameters, and the shooting content at this time has no actual analysis value

Method used

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  • 24 color card video key frame automatic localization and color difference time sequence change analysis method

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Embodiment Construction

[0040] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] It should be noted that, in the following specific embodiments, when describing the embodiments of the present invention in detail, in order to clearly show the structure of the present invention for the convenience of description, the structures in the drawings are not drawn according to the general scale, and are drawn Partial magnification, deformation and simplification are included, therefore, it should be avoided to be interpreted as a limitation of the present invention.

[0042] For the current objective image quality evaluation system, the chart used to make a 24-color map contains 24 colors of natural objects, and the standard value of the color space of the chart is known. In the process of video shooting standard charts, the initial expectation test equipment is in the state of automatically adjusting relevant par...

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Abstract

A 24 color card video key frame automatic localization and color difference time sequence change analysis method is disclosed.The photographing stable period data of the equipment to be tested obtained by prior knowledge is combined with the inter-frame difference method, A 24 color card color difference analysis result is associated with a point in time corresponding to a key frame, The timing sequence change rule of the color difference of 24 color cards in the whole shooting process can be obtained, and the purpose of color difference analysis of 24 color cards in batch can be achieved byautomatically dividing the map card area, which greatly improves the computational efficiency and reduces the computational amount.

Description

technical field [0001] The invention relates to an objective image quality evaluation method, and more specifically, to a method for automatic positioning of video key frames of a 24-color card and analysis method for time-series change of color difference. Background technique [0002] The 24-color map chart is the test object often used in objective image quality evaluation. For the current objective image quality evaluation system, the chart used to make a 24-color map contains 24 colors of natural objects, and the standard value of the color space of the chart is known. When performing the 24-color chart test and evaluating the test results, it is necessary to automatically locate the key frames with practical analysis significance in the video shooting process, and automatically extract and analyze the image color difference related parameters based on the 24-color chart in the objective evaluation system of the image. Perform overall timing analysis. [0003] The exi...

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Application Information

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IPC IPC(8): G06T7/00G06T7/11G06T7/136G06T7/155G06T7/90
CPCG06T7/0002G06T2207/10016G06T2207/30168G06T7/11G06T7/136G06T7/155G06T7/90
Inventor 郭宝珠王道宁张亚东
Owner 易诚高科(大连)科技有限公司
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