裴晓芳,王洁,宋林.基于FPGA的快速图像纹理特征提取方法的研究[J].电子测量与仪器学报,2017,31(7):1067-1073
基于FPGA的快速图像纹理特征提取方法的研究
Research of fast image texture feature extraction method based on FPGA
  
DOI:10.13382/j.jemi.2017.07.012
中文关键词:  FPGA  卷积核  纹理特征  滤波器
英文关键词:FPGA  convolution kernel  texture feature  filter
基金项目:国家自然科学基金(11202106)、江苏省气象探测与信息处理重点实验室开放课题(KDXS1401)、江苏高校品牌专业建设工程、江苏省“信息与通信工程”优势学科建设项目资助
作者单位
裴晓芳 1. 南京信息工程大学江苏省气象探测与信息处理重点实验室南京210044; 2. 南京信息工程大学江苏省大气环境与装备技术协同创新中心南京210044; 3. 南京信息工程大学电子与信息工程学院南京210044 
王洁 1. 南京信息工程大学江苏省气象探测与信息处理重点实验室南京210044; 3. 南京信息工程大学电子与信息工程学院南京210044 
宋林 1. 南京信息工程大学江苏省气象探测与信息处理重点实验室南京210044; 3. 南京信息工程大学电子与信息工程学院南京210044 
AuthorInstitution
Pei Xiaofang 1. Jiangsu Key Laboratory of Meteorological Observation and Information Processing, Nanjing University of Information Science and Technology, Nanjing 210044, China; 2. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing210044, China; 3. College of Electronic and Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China 
Wang Jie 1. Jiangsu Key Laboratory of Meteorological Observation and Information Processing, Nanjing University of Information Science and Technology, Nanjing 210044, China; 3. College of Electronic and Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China 
Song Lin 1. Jiangsu Key Laboratory of Meteorological Observation and Information Processing, Nanjing University of Information Science and Technology, Nanjing 210044, China; 3. College of Electronic and Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China 
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中文摘要:
      图像特征的一个重要分支就是纹理特征,它体现了不同图像和物体的形态、大小、分布、方向等重要参数,对图像特征识别起到决定性因素。但是纹理特征提取的过程十分复杂且计算量巨大,为了解决这个难题,提出了一种在现场可编程逻辑门阵列(FPGA)平台下实现纹理特征提取新方法。首先对基本图像特征算法做了并行化的优化,从算法的数值范围和表示精度两个角度,做了相应的分析和误差控制,从而适应FPGA的运行。然后对FPGA的数据流传输提出了一个高效率的解决办法,该方法对其中的主要模块采用了流水线优化,并采用寄存器配置模式,从而在线地修改参数,适应不同的图像大小和卷积核等环境变量。结果表明,在同等功耗条件下,可以达到10倍于CPU的性能,达到了快速提取特征的目的。
英文摘要:
      The image feature is an important branch of texture feature, which reflects the different images and object shape, size, distribution, direction, and other important parameters and plays a decisive factor on image characteristics recognition. But the texture feature extraction process is very complex and time cost. In order to solve the problem, a new method to extract texture feature based on FPGA is implemented. First, the texture feature extraction method is optimized with parallel algorithm, then the error is analyzed and controlled based on numerical range and representation accuracy, so the method can operate on FPGA efficiently. Also, a method to improve the data stream transmission on FPGA is designed, which employs pipeline optimization on main modules and register allocation model. The system on FPGA can modify parameters on line to adapt for different environmental variables, such as image size, convolution kernel and so on. The results show that the proposed model extracts image texture feature up to ten times faster than CPU under the same power consumption, and it is an ideal system to fast extract image texture feature based on FPGA.
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