摘要
介绍了二进制联合变换器中用于对联合功率谱进行二进制化取阈值的三种方法：固定法、中值方法、子集中值法，并分别对这三种取阈方法的ＪＴＣ以及传统ＪＴＣ的性能进行了比较．结果表明由于第二、第三种阈值方法中阈值受目标图象背景噪音的影响，在背景噪音较大的情况下，使用阈值随噪音而定的后两种方法比第一种固定阈值的方法具有更好的相关性．
Three types of thresholding methods used to binarize the joint power spectrum in the binary joint transform correlator are introduced:fixed value thresholding method,median thresholding method and subset median thresholding method.The performance of binary joint transform correlator using these threshoding methods respectively with that of the conventional linear JTC are analyzed.The results indicate that for the large input scene noise the second and the third thresholding method,which is dependent of the scene noise,is better than the fixed threshold in correlation performance.
出处
《首都师范大学学报（自然科学版）》
1999年第3期31-37,共7页
Journal of Capital Normal University：Natural Science Edition
关键词
阈值
非线性
联合变换器
JTC
二进制
threshold,binary nonlinear joint transform correlation,subset median.
