西安电子科技大学学报

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仿视皮层V1结构的纹理特征提取

邹洪中;许悦雷;马时平;李帅;张文达   

  1. (空军工程大学 航空航天工程学院,陕西 西安 710038)
  • 收稿日期:2016-06-29 出版日期:2017-06-20 发布日期:2017-07-17
  • 作者简介:邹洪中(1992-),男,空军工程大学硕士研究生,E-mail: hongzhongz@126.com
  • 基金资助:

    国家自然科学基金资助项目(61372167, 61379104)

Texture feature extraction simulating the structure of V1 in the cortex

ZOU Hongzhong;XU Yuelei;MA Shiping;LI Shuai;ZHANG Wenda   

  1. (Institute of Aeronautics and Astronautics Engineering, Air Force Engineering Univ., Xi'an 710038, China)
  • Received:2016-06-29 Online:2017-06-20 Published:2017-07-17

摘要:

针对传统模型在提取图像纹理特征时的局限性,借鉴初级视皮层细胞对边缘及形状的敏感性,提出了基于初级视皮层模型的图像纹理特征提取模型.采用二维Gabor滤波器和指数延迟函数来模拟初级视皮层简单细胞的感受野,并引用绝对值求和与归一化进一步得到初级视皮层细胞模型,分析其对自然图像的响应输出特性,解码得到图像的纹理特征.仿真结果表明,建立的初级视皮层细胞模型能够基本拟合生物实验数据,实现对栅格及随机点刺激的运动特征提取; 所提纹理特征提取模型在对比选取最佳模型参数时能较好地实现对简单人造图像及自然图像的纹理特征提取,有效地搭建了生物视觉与计算机视觉的联系平台.

关键词: 纹理, 视觉特征, 初级视皮层模型, 自然图像, 运动特征

Abstract:

Focusing on the limitation of the traditional model in extracting image texture features, and referring to the sensitivity of V1 to the edge and shape, the texture feature extraction model based on the V1 model is creatively put forward. 2D Gabor filters and exponential delay function are adopted to simulate the receptive fields of the V1 simple cell, and further a V1 model is obtained by citing the sum of absolute values and normalization, and by analyzing the response characteristics of natural images, image texture features can be obtained by decoding. Simulation results show that the V1 model can tally basically with the experimental data of biology and extract motion features from the grid and random-dot stimuli, and by choosing the best model parameters by comparison, the proposed texture feature extraction model can extract texture features from simple synthetic images and natural images, which effectively sets up the correlation platform of biological vision and computer vision.

Key words: texture, visual feature, primary visual cortex model, natural image, motion feature