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景像匹配参考图中存在的重复模式严重影响匹配概率及匹配可信度，景像匹配要求精度与匹配概率同时满足一定的要求，若参考图中存在重复模式，对匹配的精度和概率必定产生一定程度的影响。因此，度量参考图中的重复模式是景像匹配的重要步骤之一。重复模式的多少是衡量参考图可匹配度的重要指标，直接影响匹配概率。文中研究了频域内重复模式的度量以及统计重复模式占参考图百分比的方法，并分别对参考图的灰度图、边缘增强图及二值化边缘图进行了分析，提供了参考图可匹配度定量分析的依据。
The duplicate pattern existing in the scene matching reference picture seriously influences the matching probability and the matching reliability. The scene matching accuracy and the matching probability meet certain requirements at the same time. If there is a repetitive pattern in the reference picture, the accuracy and probability of matching must be generated A certain degree of impact. Therefore, measuring the repetitive patterns in the reference map is one of the important steps in scene matching. The number of repetitive patterns is an important index to measure the matching degree of reference graphs, which directly affects the matching probability. In this paper, we study the measurement of the repetitive patterns in the frequency domain and the method that the statistical repetitive pattern occupies the percentage of the reference graph. The gray graph, edge enhancement graph and binary edge graph of the reference image are analyzed separately. The basis of quantitative analysis.