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． This paper introduces three methods for binarizing the joint power spectrum in the binarized converter: the fixed method, the median method and the sub-set median method, and separately compares the JTC of these three threshold methods and the traditional JTC Performance is compared. The results show that the second and third thresholding methods are affected by the background noise of the target image. In the case of larger background noise, the latter two methods with thresholds depend on the noise than the first method with fixed thresholding Have a better correlation.