文章摘要
寸毛毛,卢军.基于改进Hu矩和矩形拟合的芯片识别定位算法[J].包装工程,2018,39(3):151-156.
CUN Mao-mao,LU Jun.Chip Recognition and Location Algorithm Based on Improved Hu Moments and Rectangle Fitting[J].Packaging Engineering,2018,39(3):151-156.
基于改进Hu矩和矩形拟合的芯片识别定位算法
Chip Recognition and Location Algorithm Based on Improved Hu Moments and Rectangle Fitting
投稿时间:2017-07-13  修订日期:2018-02-10
DOI:10.19554/j.cnki.1001-3563.2018.03.029
中文关键词: 视觉系统  Ostu分割  改进Hu矩  矩形拟合:识别定位
英文关键词: visual system  Ostu segmentation  improved Hu moment  rectangle fitting  recognition and location
基金项目:陕西省科技厅自然科学基金(2016GY-049)
作者单位
寸毛毛 陕西科技大学西安 710021 
卢军 陕西科技大学西安 710021 
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中文摘要:
      目的 为了实现高质量、高精度的全自动SIM贴片机的视觉识别定位,采用基于改进Hu矩和矩形拟合的芯片识别定位算法对芯片进行识别定位。方法 首先对图像进行预处理,在Ostu分割的基础上提取图像的形状轮廓。然后利用相对矩和离心率特征相结合的改进Hu矩进行芯片的识别检测。最后在识别的基础上提取外轮廓,通过对外轮廓的矩形拟合实现对芯片定位的目的。结果 识别芯片时采用改进Hu距的方法,正确率至少达到98%,显著提高了芯片的识别能力。芯片进行定位时,矩形拟合定位精度在0.5像素之内,位置精度高。结论 该方法可基本满足芯片贴装时SIM贴片机视觉系统对高质量和高精度的要求。
英文摘要:
      The work aims to recognize and locate the chip by means of the chip recognition and location algorithm based on the improved Hu moments and rectangle fitting, for the purpose of realizing the visual recognition and location of the automatic SIM placement machine with high quality and accuracy. Firstly, the image was pre-processed, and the contour shape of the image was extracted based on the Ostu segmentation. Then, the chip was recognized and detected with the improved Hu moments combined with the relative moments and the eccentricity characteristics. Finally, the external contour was extracted on the basis of the recognition and the chip was located through the rectangle fitting of the external contour. The experimental results showed that, for chip recognition with an improved Hu moment, the accuracy was at least up to 98%, significantly improving the ability of chip recognition. When the chip was located and the rectangle fitting positioning accuracy was within 0.5 pixels, the position precision was high. The method can basically meet the requirements of high quality and high precision for the visual system of the SIM placement machine during chip placement.
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