中文说明：对图像分块，计算每个块的均值和方差，并给出了结果的图象化表示，易于观察
English Description：
The image is divided into blocks, the mean and variance of each block are calculated, and the image representation of the results is given, which is easy to observe
The image is divided into blocks, and the mean and variance of each block are calculated
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中文说明：对图像分块，计算每个块的均值和方差，并给出了结果的图象化表示，易于观察
English Description：
The image is divided into blocks, the mean and variance of each block are calculated, and the image representation of the results is given, which is easy to observefinalblock.m