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双门限判决能够提高测距码检测率，降低虚警率。
Two thresholds can improve the detection rate, and reduce the false alarm rate of ranging codes.
针对双门限方法存在的不足，提出一种重叠加窗的双门限窄带干扰抑制方法。
Based on the shortcomings of the double threshold method, a double threshold method with overlap windowing is proposed in this paper.
针对红外图像，采用双门限分割法进行图像分割，然后采用分段灰度变换法进行图像增强。
An infrared image processing solution is proposed. It USES bi-threshold method to segment image and enhance the image with segmentation gray scale transform method.
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