中文说明：此代码是图像的使用离散余弦变换压缩。使用离散余弦变换的图像压缩是高压缩率和高的峰值信噪比信号的有力工具。
English Description：
This code is for compression of an image using DCT. Image compression using DCT is a powerful tool with high compression ratio and high peak signal to noise ratio.
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中文说明：此代码是图像的使用离散余弦变换压缩。使用离散余弦变换的图像压缩是高压缩率和高的峰值信噪比信号的有力工具。
English Description：
This code is for compression of an image using DCT. Image compression using DCT is a powerful tool with high compression ratio and high peak signal to noise ratio.