提出，对于BMP图象，直接在象素值上提取特征； 对于JPEG图象，在其DCT系数中提取特征。

Proposed that features be extracted from spacial pixel values for BMP image and from DCT coefficients for JPEG images.

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在读取信号之前和之后，你可以提取存在于象素中的噪音信号，然后在后续的过程中通过减去这些噪音信号来达到消除它们的目的。

Before and after reading out the signals, you can extract noise existing within the pixels themselves, and then cancel it out by subtracting it at a later stage.

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针对模糊图像的弱点，分析了通过增强象素模糊属性对比度来提取边界特征的基本原理，实现了两幅图像的配准。

Aiming at the disadvantage of fuzzy image, by making some analysis about extracting edge feature based on fuzzy contrast enhancement algorithm, two images registration is achieved.

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