利用尺度不变量变换，提取逆合成孔径雷达二维像的尺度信息，并按照从大到小的顺序重新排列，称为顺序尺度。
The approach provides effective features for identification using the order scales extracted by scale invariant feature transform.
通常，一组有序数据的类别有自然的顺序，但尺度上相邻点之间的差距不必总是相同的。
Usually, categories for an ordinal set of data have a natural order, but the distinction between adjoining points on the scale is not necessarily always the same.
定序尺度(rank)—定序尺度可应用于一组有顺序的数据，有顺序指的是属于该尺度的值和观察值可以按顺序排列或附带有评级尺度。
Rank - a rank scale applies to a set of data that is ordinal (the values and observations belonging to it can be put in order or have a rating scale attached).
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