空间目标光谱特征快速提取

本文利用完备正交函数系计算图象强度函数的数字投影特征序列，此投影特征既能反映目标的外形特点，又能反映目标的光谱特征，利用它不但能区分不同外形的空间目标，还能区分外形相同而光谱特性不同的真假目标。本文还介绍了空间目标光谱特征快速提取系统中需要解决的关键问题和方法。提出了一种空间目标边缘检测梯度算法和一种运动坐标系建立方法。用不同类型卫星图象做了大量实验，验证了所提方法的合理性和可行性。

THE FAST EXTRACTION OF SPECTRAL FEATURES OF SPACE OBJECTIVES

This paper calculates the digital projection feature series of image functions by making use of complete orthogonal function series. The digital projection features can reflect both geometrical outline features and spectral features of objectives. The space objectives of different geometrical outline can be identified by use of them, as well as the true and false objectives of possessing the same outline shapes, but different spectral features, can also be identified by use of them. The key problems and methods of the fast extraction system of spectral features of space objectives are introduced in the paper. The gradient algorithm of edge detection of space objectives and the method of constructing the movable coordinates have been proposed. The reasonableness and realizability of the method have been proved by a large number of experiments with various types of satellite.