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Method and device for processing video data

A technology of video data and processing method, applied in the multimedia field, can solve the problems of inapplicable extraction of video data, etc., achieve good real-time performance, reduce complexity, and resist geometric distortion

Inactive Publication Date: 2009-09-09
HUAWEI TECH CO LTD +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

This algorithm is proposed for image data, and it has good robustness in image and noise processing and in the face of geometric attacks, but this algorithm is suitable for extracting the hash value of image data, not for extracting the hash value of video data. Greek value

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  • Method and device for processing video data
  • Method and device for processing video data

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Embodiment Construction

[0040] The technical solutions of the embodiments of the present invention will be described in further detail below with reference to the drawings and embodiments.

[0041] Such as figure 1 As shown, it is a flow chart of the video data processing method of the embodiment of the present invention, including the following steps:

[0042] Step 101, preprocessing the video data to obtain a grayscale frame set;

[0043] Step 102, normalize the grayscale frame set to obtain a normalized grayscale frame set;

[0044] Step 103. Calculating the average gray value of the normalized gray frame set, and determining the gray range extracted from the histogram according to the average gray value;

[0045] Step 104: Divide the grayscale range into more than one grayscale interval, and obtain a hash value by comparing the number of pixels in different grayscale intervals.

[0046] figure 2 Shown is the flowchart of preprocessing and normalization processing in the video data processing...

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Abstract

The embodiment of the invention relates to a method and a device for processing video data. The method comprises the following steps: preprocessing the video data to obtain a grayscale frameset; performing normalization treatment on the grayscale frameset to obtain a normalized grayscale frameset; calculating a grayscale mean of the normalized grayscale frameset, and determining the density latitude extracted by a column diagraph according to the grayscale mean; and dividing the density latitude into more than one grayscale section, and obtaining a Hash value through comparison of the number of pixels in different grayscale sections. The device comprises a preprocessing module used for preprocessing the video data, a normalization module used for performing normalization treatment on the grayscale frameset, a column diagraph extracting module used for determining the density latitude extracted by the column diagraph, and an acquisition module used for dividing the density latitude into more than one grayscale section and acquiring the Hash value. The method and the device can effectively resist the geometric distortion, and reduces the algorithmic complexity to make algorithm have good real time performance.

Description

technical field [0001] The embodiments of the present invention relate to the field of multimedia technologies, and in particular, to a video data processing method and device. Background technique [0002] Video hash value is the unique and extremely compact numerical representation of video data. As a video data processing method, video hash algorithm can be used for video data retrieval and authentication. According to the video hash algorithm, the database of video data is pre-constructed, and then the video data is transmitted. During the transmission process, the hash value of the video data can be calculated and the database can be searched to determine whether there is any infringement. A better video hashing algorithm needs to have good uniqueness and robustness, where uniqueness means that the hash value is completely different for different video data; robustness means that after the video data undergoes some content maintenance operations, Its hash value remains...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N7/167
Inventor 项世军杨建权黄继武张永平郝韬
Owner HUAWEI TECH CO LTD
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