There are many similarity measures in image matching field, the matching performance of which can only be evaluated by experiments so far.
图像匹配领域存在多种相似度指标，目前只能通过实验判断某种指标在实际问题中的匹配性能。
Fusing different image features and using different similarity measures depending on different characteristics improves the accuracy of image retrieval.
针对不同特点的图像，融合不同的图像特征，并采用不同的相似性度量方法，提高了图像检索的准确率。
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