Method and device for processing video data
A technology of video data and processing method, applied in the field of multimedia
Inactive Publication Date: 2011-07-20
HUAWEI TECH CO LTD +1
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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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[0042] The technical solutions of the embodiments of the present invention will be described in further detail below with reference to the drawings and embodiments.
[0043] 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:
[0044] Step 101, preprocessing the video data to obtain a grayscale frame set;
[0045] Step 102, normalize the grayscale frame set to obtain a normalized grayscale frame set;
[0046] Step 103, calculating the gray-scale mean value of the normalized gray-scale frame set, and determining the gray-scale range extracted from the histogram according to the gray-scale mean value;
[0047] 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.
[0048] figure 2 Shown is the flowchart of preprocessing and normalization processing in the vi...
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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 havegood real time performance.
Description
Technical field [0001] Examples of the present invention involve multimedia technology fields, especially a video data processing method and device. Background technique [0002] The video hash value is the only and extremely compact value of video data. The video of the video is a video data processing method, which can be used for the retrieval and certification of video data.Based on the video of the video of the video, the database of the video data is pre -transmitted, and the video data is transmitted. During the transmission process, you can calculate the hash value of the video data and find the database to determine whether there is any infringement.A better video Highel algorithm requires good uniqueness and stability. The uniqueness means that for different video data, the hash value is very different; the stability means that the video data is maintained after some content is maintained.Its hash value remains unchanged or basically unchanged.In addition, considering t...
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IPC IPC(8): H04N7/24
Inventor 项世军杨建权黄继武张永平郝韬
Owner HUAWEI TECH CO LTD