在二值边缘图像中应用双窗口分别选定目标和要去除的噪声，在各窗口中采用双向扫描提取目标特征。
Choose the target and the noise that will be removed in two Windows, then extract target with dual-direction scan in each window.
在指纹门禁系统中，指纹图像预处理构成了整个系统的基础，而二值化与细化则是预处理过程的核心。
In the fingerprint entrance control system, the preprocessing of fingerprint images is the foundation of the whole system whose core is binarization and thinning.
针对文字扫描操作，给出了这种安全范式在二值图像上的具体实现方法：利用扫描过程中测量噪声的不确定性来携带信息。
A scheme to realize this secure paradigm in binary images using scanning operation is proposed and a more efficient practical method is also presented based on morphological theory.
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