In this paper, a new image feature retrieval method is proposed for large number of JPEG format medical images.
针对医学图象数据库中大量存在的JPEG压缩图象，提出了一种新颖的特征提取算法。
In view of feature of image retrieval, the position parameter of IFS code is replaced with the relative distance and direction parameter.
针对图像检索的特点，将分形码中的位置参数替换为相对距离与方向系数。
Color quantization is an important method of image retrieval based on color feature.
颜色量化是基于颜色特征的图像检索的一个重要方法。
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