CAJ | 학술논문

针对彩色印刷品表面质量在线检测过程中存在目标图像定位精度低、定位速度慢而导致检测误判率高、检测效率低等问题,提出了一种基于粒子群的彩色图像分层搜索定位新算法.首先采用图像金字塔结构在空间域中对彩色图像进行分层,分析尺度因子和层数的选择对提取目标图像关键特征的影响;其次,基于边缘特征建立各层的匹配模型,最后引入粒子群算法(PSO)求解每层的最优匹配参数,实现待匹配对象的快速定位.实验结果分析表明,该方法对宽幅面彩色印刷品像素大小为1024×454的目标图像平均校正偏差不超过0.1°,即水平方向上的定位误差可达0.017个像素;对角度偏移小于6°的图像,分3层搜索校正的最长时间仅为12.6 ms,以上实验结果显示出该定位方法具有较高的精度和较强的实时性.
침대채색인쇄품표면질량재선검측과정중존재목표도상정위정도저、정위속도만이도치검측오판솔고、검측효솔저등문제,제출료일충기우입자군적채색도상분층수색정위신산법.수선채용도상금자탑결구재공간역중대채색도상진행분층,분석척도인자화층수적선택대제취목표도상관건특정적영향;기차,기우변연특정건립각층적필배모형,최후인입입자군산법(PSO)구해매층적최우필배삼수,실현대필배대상적쾌속정위.실험결과분석표명,해방법대관폭면채색인쇄품상소대소위1024×454적목표도상평균교정편차불초과0.1°,즉수평방향상적정위오차가체0.017개상소;대각도편이소우6°적도상,분3층수색교정적최장시간부위12.6 ms,이상실험결과현시출해정위방법구유교고적정도화교강적실시성.
@@@@In order to solve the problem that the high rate of misdiagnosis and inefficiency in the surface quality online inspection process of color printing due to low accuracy and speed during locating the target image, a new location algorithm is proposed by layering and searching based on particle swarm optimization (PSO) for color printing. Firstly, color printing is layered by image pyramid structure within spatial domain. The selection of scale factor and pyramid layer, which impacts on extracting the key features of target image, is analyzed. Secondly, each level of the color image location model is built based on the edge feature. Thirdly,the optimum parameters of each model are solved by PSO algorithm, and the fast location for matching object is realized. Experimental results show that the average adjusting errors,for the target image of wide color printing of 1024 × 454,are less than 0.1 degree,i.e. the location errors are up to 0.017 pixels in horizontal direction. For color images, the shift angle is less 6 degree,the time of searching and adjusting is only 12.6 ms to its three grey layers. The high accuracy and real-time property are demonstrated.