【摘要】 用二维FFT方法处理干涉图时,由于FFT算法只能处理数字化的离散数据,且要求数据分布区域必须是矩形状,因此必须设法将圆形区域干涉图扩展延拓成方形区域.在研究二维FFT法进行干涉测试基本原理的基础上,提出了一种干涉图空域迭代延拓的原理和方法,利用该方法对一幅实际干涉图进行了空域延拓,并取得了满意的效果.更多还原

【Abstract】 In the interferometry of using 2- D FFT method,the circular interferogram must be spread to become square region.because FFT arithmetic only processes numeric discrete data,distributing in square region,therefore,An iterated region spreading arithmetic for interforogram is proposed after investigation of interferometry with 2- D FFT.A practical interferogram is spreaded with the arithmetic.The result is satisfied.更多还原