CAJ | 학술논문

火炮内膛检测是火炮使用维修过程中的一项重要内容,关系到火炮的射击精度和使用安全性.分析了通过自聚焦透镜阵列所获取的火炮内膛图像的特点,提出了一种基于相位相关法和对数极坐标法相结合的火炮内膛局部图像快速无缝拼接算法.相位相关法可以实现对存在平移的图像进行拼接,而不具有尺度和旋转不变性,对数极坐标法可将图像笛卡尔坐标系下的尺度和旋转变化变换为对数极坐标系的平移运动,利用该组合方法可得出归一化相位相关度的峰值,利用峰值点坐标可求得两幅相邻图像的旋转和缩放参数值,根据此参数进行多方位图像的拼接,然后采用像素最大值法得到内膛全景图像.实验结果表明,该方法可获得无缝、清晰和完整的火炮内膛图像.
화포내당검측시화포사용유수과정중적일항중요내용,관계도화포적사격정도화사용안전성.분석료통과자취초투경진렬소획취적화포내당도상적특점,제출료일충기우상위상관법화대수겁좌표법상결합적화포내당국부도상쾌속무봉병접산법.상위상관법가이실현대존재평이적도상진행병접,이불구유척도화선전불변성,대수겁좌표법가장도상적잡이좌표계하적척도화선전변화변환위대수겁좌표계적평이운동,이용해조합방법가득출귀일화상위상관도적봉치,이용봉치점좌표가구득량폭상린도상적선전화축방삼수치,근거차삼수진행다방위도상적병접,연후채용상소최대치법득도내당전경도상.실험결과표명,해방법가획득무봉、청석화완정적화포내당도상.
The cannon chamber detection is an important task in the gun bore maintenance process, and it has direct relationship with the firing accuracy and security. The features of cannon chamber images obtained from grin lens array are analyzed, and an algorithm based on the phase-correlation and log polar is presented, which can realize mosaic image fast and seamlessly. Phase correlation algorithm can only match the images with shift invariability, and would face difficulty when dealing with motion model,where either scaling or rotation of the matched images is presented. Log-polar image transform can convert the scale and rotation changes in Descartes coordinate to shift changes in log-polar coordinate. This method calculates the normalized peak of phase correlation of cross-power spectrum, and gets the rotation and scale between the two conjoint images using the peak coordination. Images are matched based on these parameters, and then chamber panoramic images are obtained by using method of pixels maximum value. Experimental results show that the proposed method can get seamless, clear and full image of gun bore.