实现离轴变换再现算法！离轴全息再现有零级像干扰，高通滤波，滤掉不必要的成分，对离轴全息图进行FFT，等到全息图的频谱分布- Off-axis transformation algorithm to achieve reproduction! Off-axis holographic reproduction zero level as interference, high pass filter, filter out unwanted ingredients, off-axis holog