Radon变换与功率谱结合的PSA图像倾斜度自动校正算法  

Automatic Tilt Correcting Algorithm for PSA Images Based on Radon Transform and Power Spectrum

作　　者：罗小刚[1] 汪德暖[1] 侯长军[1] 霍丹群[1] 易彬[2] 

机构地区：[1]重庆大学生物工程学院,重庆400030 [2]泸州老窖股份有限公司,四川泸州646000

出　　处：《传感技术学报》2011年第9期1296-1300,共5页Chinese Journal of Sensors and Actuators

基　　金：国家"863"项目(2006AA04z349);国家自然科学基金项目(30770568);中央高校基本科研业务费项目(CDJXS10231117);教育部高校博士点基金项目(20090191110030);重庆市自然科学基金项目(CSTC;2009BB5219;2008AC7037)

摘　　要：针对卟啉传感阵列(PSA)图像中卟啉点阵列可能发生倾斜的现象,设计了一种自动校正算法。算法之初对图像进行滤波、对比度增强操作,并求得图像的二值形态学边界,利用此二值边界图像作为求取倾斜角度运算的输入,减少了噪声的影响,同时也降低了时间的花费;而后利用radon变换与功率谱结合的方法来求取倾斜角度,解决了单纯的radon变换法易受空域噪声的影响,使得校正的精度大大提高。利用该算法对卟啉传感阵列图像进行自动校正测试,结果表明该算法能够获得很好的校正效果。An image tilt correcting algorithm for porphyrin sensor array（PSA）images is presented,in response to the phenomenon that PSA images may have a small tilt angle.The algorithm obtains the tilt angle of porphyrin sensor array images based on radon transform and power spectrum.Meanwhile,combining morphological methods,the processing of filtering and contrast enhancing for PSA images is carried out as the first step,then the binary boundaries of the images,which are used as the inputs of tilt correcting operations,are obtained using morphological method.The algorithm has solved the problem of result instability using the method of radon transform,made up for the high cost of computing using the method of power spectrum and improved the accuracy of correction.With the algorithm,a lot of tests have been done for the porphyrin sensor array images.The results showed that this algorithm could gain a good performance.

关 键 词：图像预处理 倾斜校正 RADON变换 功率谱估计 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]