Assign a name for the file where the retrieved image will be stored.

为保存所检索到的图像使用的文件分配一个名字。

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Use the saved Message Digest signature (see step 2, above) to verify the integrity of the retrieved image.

使用保存的Message Digest签名(参见上面的第2步)检查接收到的映像的完整性。

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Retrieved image with good visual effect can be obtained for the digital image containing several space frequencies under proper recording conditions.

选择适当的记录条件可以对含有多种空间频率条纹的二值图像获得较好的重构效果。

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The lives lost cannot be retrieved, but there's still a chance to keep a positive image.

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