光电工程
光電工程
광전공정
OPTO-ELECTRONIC ENGINEERING
2014年
9期
69-74
,共6页
相位相关%图像配准%异物检测%机器视觉
相位相關%圖像配準%異物檢測%機器視覺
상위상관%도상배준%이물검측%궤기시각
phase correlation%image registration%foreign particle inspect%machine vision
针对瓶装药液微小异物视觉检测系统中,由于平台和相机振动所导致的序列图像中瓶体出现不同程度的随机偏移问题,提出了一种基于改进型相位相关法的药液图像配准方法。首先,引入图像投影将原始相位相关配准算法分解为两个一维配准算法,显著提高算法实时性。其次,引入Hanning窗函数滤波,克服图像边缘“不连续性”对配准精度的影响。最后,针对原始相位相关配准算法只能达到像素级配准精度的缺点,引入峰值估计技术,将配准精度提高到亚像素级。实验结果表明,本文方法配准精度可达1/100像素级,并对于亮度变化、噪声干扰具有一定免疫性,能满足瓶装药液微小异物视觉检测系统的实际生产要求。
針對瓶裝藥液微小異物視覺檢測繫統中,由于平檯和相機振動所導緻的序列圖像中瓶體齣現不同程度的隨機偏移問題,提齣瞭一種基于改進型相位相關法的藥液圖像配準方法。首先,引入圖像投影將原始相位相關配準算法分解為兩箇一維配準算法,顯著提高算法實時性。其次,引入Hanning窗函數濾波,剋服圖像邊緣“不連續性”對配準精度的影響。最後,針對原始相位相關配準算法隻能達到像素級配準精度的缺點,引入峰值估計技術,將配準精度提高到亞像素級。實驗結果錶明,本文方法配準精度可達1/100像素級,併對于亮度變化、譟聲榦擾具有一定免疫性,能滿足瓶裝藥液微小異物視覺檢測繫統的實際生產要求。
침대병장약액미소이물시각검측계통중,유우평태화상궤진동소도치적서렬도상중병체출현불동정도적수궤편이문제,제출료일충기우개진형상위상관법적약액도상배준방법。수선,인입도상투영장원시상위상관배준산법분해위량개일유배준산법,현저제고산법실시성。기차,인입Hanning창함수려파,극복도상변연“불련속성”대배준정도적영향。최후,침대원시상위상관배준산법지능체도상소급배준정도적결점,인입봉치고계기술,장배준정도제고도아상소급。실험결과표명,본문방법배준정도가체1/100상소급,병대우량도변화、조성간우구유일정면역성,능만족병장약액미소이물시각검측계통적실제생산요구。
For bottled liquid micro foreign particle visual inspection system, due to the platform and camera vibration, resulting in the bottle in image sequences with varying degrees of random offset, we propose a liquid medicine image registration method based on modified phase correlation. First, we introduce the projected image into origin phase correlation registration algorithm to divide it into two one-dimensional registration algorithms, which can greatly improve the algorithm’s operation speed. Second, we introduce Hanning window function filtering to overcome the harm to the registration accuracy due to the “discontinuity” of the image edges. Third, we introduce the peak estimation technique to improve the registration accuracy to sub-pixel level. Experimental results show that the proposed method can achieve 1/100 pixel registration accuracy, and has certain immunity to luminance change and noise. The method can meet the requirement of the actual production of bottled liquid micro foreign particle visual inspection system.