Multimedia information compress technology is one of the key technologies in multimedia communication area. So the international coding standard MPEG-4 becomes focus of the research.
多媒体信息压缩的技术是多媒体通信领域的关键技术，因此编码标准MPEG - 4也成为了研究的焦点。
Meanwhile human face as the visual object of images and videos is taking an important position of status in the studying area of computer vision, pattern recognition and multimedia technology.
与此同时，在计算机视觉、模式识别和多媒体技术等研究领域中，人脸作为图像与视频中的视觉对象之一，占有非常重要的地位。
So, the Content Based image and Video retrieval technology comes into being and become an important research area in multimedia retrieval and image processing.
由此，基于内容的图像和视频检索技术得到了越来越多的重视，成为了多媒体信息检索和图像处理领域中的重要研究方向。
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