根据jepg压缩的基本原理，先进行分块，该

模拟JPEG压缩过程

实验读取的是图像前4*4的小块，然后对其进行DCT变换，将空间域变换到频域中，再除以量化系数，减小数据量。并进行取整操作。然后根据量化后的数值矩阵进行解码操作。-First conduct a block, the experiment is to read the image the first 4* 4 small pieces, then its DCT transform, the space domain to the frequency domain, and then divided by the quantization factor, reducing the amount of data. And the rounding operation. Then the quantized value of matrix decoding.