CAJ | 학술논문

电路板红外图像配准技术是电路板红外热成像故障检测系统的核心。针对传统图像配准算法精度和效率较低等不足，为了提高电路板红外图像配准精度和效率，设计了一种基于ROI灰度压缩的图像配准算法。首先，利用Otsu法提取出电路板红外图像ROI。然后，将ROI内灰度值进行线性压缩。最后将灰度压缩后的图像进行互信息量运算和图像x平移、y平移、旋转、缩放变换参数寻优。仿真结果表明，基于ROI的灰度压缩算法能够显著减小配准时间，当两幅图像环境温度差异较大时其配准精度相比其他灰度压缩算法有明显优势。
전로판홍외도상배준기술시전로판홍외열성상고장검측계통적핵심。침대전통도상배준산법정도화효솔교저등불족，위료제고전로판홍외도상배준정도화효솔，설계료일충기우ROI회도압축적도상배준산법。수선，이용Otsu법제취출전로판홍외도상ROI。연후，장ROI내회도치진행선성압축。최후장회도압축후적도상진행호신식량운산화도상x평이、y평이、선전、축방변환삼수심우。방진결과표명，기우ROI적회도압축산법능구현저감소배준시간，당량폭도상배경온도차이교대시기배준정도상비기타회도압축산법유명현우세。
Infrared image registration technique is the core of circuit board fault detection system.In order to improve the accuracy and efficiency of circuit board infrared image registration,an image registration algorithm based on ROI gray compression is proposed.First,Otsu method is used to extract circuit board infrared image ROI.Then,the ROI gray value is made linear compression.Finally the best image transform parameters are searched like x translation,y translation,rotation,scaling by mutual information calculation.The simulation results show that the image compression algorithm base on ROI can significantly reduce the registration time.The environment temperature difference of two images is larger,the registration accuracy is better.