朱明旱,陈日新.局部方向数字模式算子的改进[J].光电子激光,2015,26(6):1179~1185 |
局部方向数字模式算子的改进 |
Improvement of the local directional number pattern operator |
投稿时间:2015-02-26 |
DOI: |
中文关键词: 局部方向数字(LDN)模式 边缘响应 人脸识别 表情识别 |
英文关键词:local directional number (LDN) pattern edge response face recognition express ion recognition |
基金项目:湖南省自然科学基金(12JJ3061)、湖南省“十二五”重点建设学科(机械设计及理论)(湘教 发2011[7])和常德市科技局(2014JF08)资助项目 (湖南文理学院 电气与信息工程学院,湖南常德 415000) ) |
|
摘要点击次数: 1133 |
全文下载次数: 0 |
中文摘要: |
局部方向数字(LDN,local directional number) 模式算子,用Kirsch边缘模板计算像素点8个方向的边缘响应 值,只能从1幅图像中获取64个特征值。为了提高该算子的特征提取 能力,提出了16邻域两种边缘 模板,利用了更多点的灰度信息计算边缘响应,可获得像素点更多方向的边缘响应,能从 图像中提取出更多的特征值。在ORL 人脸库、Yale人脸B库和Cohn-Kanade人脸库上的实验结果表明,边缘模板的改进,极大地 提高了LDN模式算子的特征提取能力, 采用16邻域的边缘模板使平均识别率 分别提高了11.5%和13.04%;并且,这种 改进还大大增强了算子对光照和噪声变化的鲁棒性。 |
英文摘要: |
Local directional number (LDN) pattern operator adopts Kirsch edge mask s to calculate eight directional edge response values of each pixel in an image.In order to improve the feature extraction capacity of LDN operator,16-neighbor and 24-ne ighbor edge masks are proposed in this paper.These two kinds of masks also use more pixels′ gray information to calculate edge respons es of each pixel in an image and can achieve more edge response values.Therefore,more than 64feature values can be extracted from an i mage to express the image.Experimental results on the ORL face database,the Yale face database B and Cohn-Kanade face database s how that when 16-neighbor and 24-neighbor edge masks are used in the LDN operator,these two operator′ average recognition rate s are separately 11.15% and 13.04%.higher than those of LDN operators with Kirsch edge masks.This demonstrates that the improv ement of edge mask can greatly promote the feature extraction capacity of LDN operator.In addition,the experimental results also sh ow that the anti-noise capability and robustness to illumination variation of LDN become stronger by changing the edge masks. |
查看全文 下载PDF阅读器 |
关闭 |
|
|
|
|
|