Abstract: A spatial color image retrieval method without any segmentation step was proposed. Thumbnail of query image was extracted in CIELab color space considering the human visual characteristic.Thumbnails of images were matched using EMD.An unsupervised matching criterion was presented based on a contrario approach. The experimental results show that our image retrieval is more simple and robust, and has better performance than image retrieval based on regions segmentation.

Key words: Thumbnail , Earth measure's distance ,  Background model , A contrario approach

摘要： 提出了一种没有引入任何分割过程的空间彩色图像检索方法。首先结合人眼视觉感知特性,在
CIELab颜色空间提取查询图像的缩略图,然后使用EMD 方法进行图像缩略图间的匹配。在匹配过程中基于a
contrario方法提出了一种无监督的匹配原则。实验结果表明,此算法不仅检索过程简单,鲁棒性强,而且检索效率明
显高于基于区域分割的图像检索方法。

关键词: 缩略图 , EMD , 背景模型 , acontrario方法