图7.4 结构冗余 7.1.2、图像数据冗余 (Image data redundancy) 5．知识冗余 随着人们认识的深入，某些图像所具有的先验知识， 如人脸图像的固有结构（包括眼、耳、鼻、口等）为人们所熟悉。
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数据压缩旨在利用图像的冗余度来减少表示图像所需的比特数，从而节省图像存贮容量，提高传输效率。
Data compression improves the efficiency of data transmission by utilizing the correlation of images and reducing the redundancy of bits representing them to save the memory capacity.
新方法利用恢复投影数据的重建图像冗余信息优化非局部均值权重。
The new method exploits the redundancy of information in the image reconstructed from the restored projection data by optimizing non-local weight.
它是去除视频数据中时间冗余度的有效方法，它的性能好坏直接影响编码的效率和图像的质量。
It is an effective method to remove the video data time redundancy, which directly affects the performance of coding efficiency and image quality.
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