计算机应用 ›› 2015, Vol. 35 ›› Issue (7): 2039-2042.DOI: 10.11772/j.issn.1001-9081.2015.07.2039

• 虚拟现实与数字媒体 • 上一篇    下一篇

基于高斯尺度空间粗糙度描述子的花粉图像分类识别

谢永华1,2, 徐赵飞1, 范文晓2   

  1. 1. 南京信息工程大学 计算机与软件学院, 南京 210044;
    2. 南京信息工程大学 江苏省网络监控中心, 南京 210044
  • 收稿日期:2015-01-19 修回日期:2015-03-15 出版日期:2015-07-10 发布日期:2015-07-17
  • 通讯作者: 徐赵飞(1991-),女,江苏无锡人,硕士研究生,主要研究方向:生物图像处理与识别,892210505@qq.com
  • 作者简介:谢永华(1976-),男,江苏靖江人,教授,博士,CCF会员,主要研究方向:模式识别、基于内容的图像检索; 范文晓(1990-),女,江苏连云港人,硕士研究生,主要研究方向:生物图像处理与识别。
  • 基金资助:

    国家自然科学基金资助项目(61375030)。

Pollen image classification and recognition based on Gaussian scale-space roughness descriptor

XIE Yonghua1,2, XU Zhaofei1, FAN Wenxiao2   

  1. 1. School of Computer and Software, Nanjing University of Information Science and Technology, Nanjing Jiangsu 210044, China;
    2. Jiangsu Engineering Center of Network Monitoring, Nanjing University of Information Science and Technology, Nanjing Jiangsu 210044, China
  • Received:2015-01-19 Revised:2015-03-15 Online:2015-07-10 Published:2015-07-17

摘要:

针对现有粗糙度描述子大多依赖于灰度值平均值,容易造成图像信息的丢失的问题,提出了一种新的基于高斯尺度空间粗糙度描述子的特征提取方法,并应用于花粉图像的分类和识别。首先,采用高斯金字塔算法,将花粉图像分割成不同层次的尺度空间;然后,在各个尺度空间上提取图像的粗糙度纹理特征;其次,通过计算粗糙度频率直方图的统计分布,提取不同尺度空间的粗糙度描述子(SSRHD);最后,采用欧氏距离计算图像的相似度。通过Confocal和Pollenmonitor图像库上的仿真结果表明,与基于隐马尔可夫模型的轮廓描述子(DHMMD)相比,该描述子在Confocal图像库上的平均正确识别率(CRR)提高了2.32%、平均错误识别率(FRR)降低了0.1%,而在Pollenmonitor图像库上的平均识别率也提高了1.2%。实验结果表明,该描述子能较好地描述花粉颗粒图像的纹理分布,对于花粉图像的旋转和姿态变化也具有良好的鲁棒性。

关键词: 高斯金字塔, 粗糙度, 花粉识别, 纹理特征, 尺度空间

Abstract:

According to the problem that the existing roughness descriptors are mostly dependent on the average grey value, which is easy to cause the loss of image information, a new roughness descriptor based on Gaussian scale space was presented for pollen image classification and recognition. With this method, the Gaussian pyramid algorithm was used to divide the image into several different levels of scale space, and then the roughness texture feature was extracted from the different level scale space. The statistical distribution of roughness frequency was calculated to build the Scale-Space Roughness Histogram Descriptor (SSRHD). At last, the Euclidean distance was used to measure the similarity between images. The simulation results on Confocal and Pollenmonitor image database demonstrate that, compared with Discrete Hidden Markov Model Descriptors (DHMMD), the Correct Recognition Rate (CRR) performed by the SSRHD increases by 2.32% on Confocal and 1.2% on Pollenmonitor, and the False Recognition Rate (FRR) decreases by 0.1% on Confocal. The experimental results show that the SSRHD feature can effectively describe the pollen image texture and it also has good robustness to pollen rotation and pose variation.

Key words: Gaussian pyramid, roughness, pollen recognition, texture feature, scale space

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