图像傅立叶变换(频域变换经典代码)，相信大家在学数字图像处理时，老师一般都要求学生用C++来实现图像Fourier变换，有了这个实例，就方便多了。_带图片可测试-images Fourier transform (frequency domain transform classic code), I believe we learn in digital image processing, teachers generally require students to use C Image Fourier transform, the existence of such examples, more convenient. _ Can be tested with pictures
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