基于方向图的空间颜色直方图的图像检索

Image Retrieval Based on Spatial Color Histogram of Oriented Graph

以图像的颜色和边缘方向为基础,该文提出了基于相同或相似方向图的空间颜色直方图的算法,将其应用于图像检索中。首先将HSV颜色空间转化到直角坐标系,利用Sobel算子提取其H、S、V3个通道的水平和垂直方向的边缘,然后计算其颜色方向获取相同或相似方向图,最后在此方向图上计算空间颜色直方图。该算法将图像的颜色、边缘方向、空间位置等潜在的关系联系在一起。实验表明,该算法能够找出用户所需内容的图像,并具有较好的平均检索率。

Based on color and edge,image retrieval using the spatial color histogram of the same or the similar oriented graph was proposed.Firstly,transform HSV color space to Cartesian coordinate system.Secondly,the color orient is extracted by using Sobel detection operator.Thirdly,obtain the same or the similar oriented graph.Finally,compute the spatial color histogram of this oriented graph.This method combines color,orient and spatial information.And the experimental results show that the proposed method is more efficient in retrieving the user-interested images.