CAJ | 학술논문

手持式广角镜头红外热像仪所拍摄的不同时刻红外图像具有刚性形变和非刚性形变，传统图像配准算法很难同时矫正刚性形变与非刚性形变，针对该问题，提出一种融合SIFT的B样条配准算法。首先在待配准图像中建立控制网格，其次运用SIFT算法寻找待配准与基准图像间的匹配点对，剔除错误匹配点对并计算出待配准图像与基准图像间的刚性变换参数，接着对控制点进行刚性变换，最后以局部强度和为测度函数，运用B样条非刚性配准算法对广角镜头引起图像的非线性进行矫正。对比实验结果表明，本文算法具有很高配准精度，能够满足实际工程精度要求。
수지식엄각경두홍외열상의소박섭적불동시각홍외도상구유강성형변화비강성형변，전통도상배준산법흔난동시교정강성형변여비강성형변，침대해문제，제출일충융합SIFT적B양조배준산법。수선재대배준도상중건립공제망격，기차운용SIFT산법심조대배준여기준도상간적필배점대，척제착오필배점대병계산출대배준도상여기준도상간적강성변환삼수，접착대공제점진행강성변환，최후이국부강도화위측도함수，운용B양조비강성배준산법대엄각경두인기도상적비선성진행교정。대비실험결과표명，본문산법구유흔고배준정도，능구만족실제공정정도요구。
Infrared images obtained by handheld infrared camera with wide-angle lens have rigid and non-rigid deform-ations. Tradition image registration algorithm is difficult to correct the rigid and non-rigid deformations. To solve this problem,B-spline non-rigid registration algorithm based on SIFT is proposed. At first,the control mesh is created in the input image. Then,matching points between input image and template image are found by SIFT algorithm. The rigid transformation parameters are calculated after ignoring the incorrect matching points. Next,the control points are transformed by rigid transformation parameters. Finally,the sum of pattern intensity is used as measurement,and the nonlinear transformation of the image that is caused by wide-angle lens is corrected by B-spline non-rigid registration algorithm. The results of comparison show that the new method has better registration accuracy and it also can meet the requirements of practical engineering accuracy.