摘要
提出一种新的基于图像形状的检索方法.首先,用Canny算子对图像进行平滑处理,提取图像边界方向直方图特征;其次,用改进的不变矩来描述图像形状的区域特征,改进后的不变矩特征不受图像的缩放、平移和旋转影响;最后,为了克服不变矩只针对对象区域而忽视图像边界的缺点,提出改进的不变矩与边界方向特征相结合的方法,使得检索取得更好的效果.仿真实验表明,提出的检索方法能够有效提高图像检索的效率.
A new kind of image retrieval method based on shape content was proposed.First,a Canny operator was used to smooth the source image and extract the feature of the edge direction histogram.Then,the improved invariant moments were used to describe the shape regional feature.The rotation,scaling-down or-up,and translation of images had no influence on those improved invariant moments.Finally,in order to overcome the shortcoming that invariant moments focus only on the region of image while overlook areas the shape edge characteristics,a new method was proposed where the improved invariant moments and edge direction were integrated.It was shown by the simulation test that the efficiency of image searching could effectively be improved by the searching method presented.
出处
《兰州理工大学学报》
CAS
北大核心
2011年第1期100-105,共6页
Journal of Lanzhou University of Technology
关键词
图像检索
CANNY算子
不变矩
方向特征
image retrieval
Canny operator
invariant moment
direction characteristics
