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Face video compression method

A technology for video compression and face model, which is used in television, instrument, character and pattern recognition, etc. It can solve the problem of slow change of model parameter vector in time domain and so on.

Active Publication Date: 2014-09-03
TSINGHUA UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the model parameter vector obtained by using this compression method changes slowly in the time domain, and the face model parameters of the front and rear frames in the video still have a lot of redundancy and compression space

Method used

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Embodiment Construction

[0088] In order to solve the problems of the technologies described above, the invention provides a method for compressing face video, the method comprising steps:

[0089] S1. Before video communication, the face model is shared between the sending end and the receiving end;

[0090] S2. Use the model to locate and parametrically characterize the face in the video to obtain a model parameter vector;

[0091] S3. Perform optimal adaptive inter-frame compression on the model parameter vector to meet the requirement that the total bit overhead is less than the upper limit of the given bit overhead, and send the compressed model parameter vector to the receiving end;

[0092] S4. After receiving the compressed model parameter vector sent by the sending end, the receiving end decompresses it;

[0093] S5. The receiving end uses the decompressed model parameter vector and the shared face model to reconstruct the face image.

[0094] Preferably, in the step S1, the face models bet...

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Abstract

The invention discloses a face video compression method and belongs to the technical field of face video data compression in the case of multimedia communication. The method is characterized by comprising steps: a face model is used for carrying out positioning and parametric characterization on the face in the video at the sending end, a face model parameter vector represented by an illumination parameter vector, a gesture parameter vector and a shape and appearance combined parameter vector is obtained, constraint that global minimal parameter error and model parameter total bit are less than the given upper limit on the basis of the given to-be-retained parameter frame sample number is carried out, the face model parameter vector after optimal adaptive interframe compression is sent to a receiving end, an independent slicing linear interpolation method is used for restoring the face model parameter vector, and the original image is obtained through face shape calculation and restored face appearance. The face video compression ratio is greatly improved while the optimal reconstruction quality is ensured, redundancy in the face video is removed to the maximal degree in the time domain, and the communication resource utilization rate is thus improved.

Description

technical field [0001] The invention provides a face video compression method, which belongs to the technical field of multimedia communication. A compression algorithm for face video data is specially designed to perform uniform quantization and adaptive linear interpolation on the data. It is mainly used to reduce the amount of video data transmission. It can get good results under the condition of extremely low bit rate. Provide high-quality video communication services such as video calls and video conferences while saving communication resources. Background technique [0002] Digital multimedia communication is one of the most challenging, fastest-growing and most active research fields in many fields of communication technology. Since the 1990s, technologies ranging from digital television broadcasting to wireless multimedia communication have been widely used in countries all over the world. The popularization of the Internet has freed multimedia communication from ...

Claims

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Application Information

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IPC IPC(8): H04N7/64H04N7/66G06K9/00
Inventor 陶晓明李扬陆建华葛宁
Owner TSINGHUA UNIV
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