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[Wavelet] FFT_IFFT DL : 0: （1）求出两维单色数字图象的傅立叶变换以及逆变换，除对比图象效果外，还要给出以中心点作为原点图象显示方式的傅立叶变换的频谱、相位谱，并验证两维傅立叶变换的性质。（2）傅立叶变换后，计算图象能量谱的分布范围：画出包含图象能量92.0％，94.6％, 96.4, 98.0％以及99.5％的圆圈区域。-(1) obtained two-dimensional monochrome digital image of the Fourier transform and inverse transform, with the exception of the effect of contrast images, but also given to the center as the origin of the image displayed Fourier transform spectrum, phase spectrum, and verify that two-dimensional Fourier transform nature. (2) Fourier Transform, the calculation of the distribution of image energy spectrum range: Draw contains images of energy 92.0, 94.6, 96.4, 98.0 and 99.5 of the circle region.
Date : 2026-01-03 Size : 1.92mb User : 杨怡