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Removing high frequency noise pulses by a low-pass filter and Schmitt-trigger.

用一低通滤波器和施密特触发器排除高频噪声脉冲。

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The traditional low-pass filter method can restrain the high frequency part and decrease noise but may destroy image detail, and other methods also have other defects.

传统的低通滤波方法将图像的高频部分滤除，虽然能达到降低噪声的效果，但会破坏图像的细节。

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In fact, there's little of note in this utilitarian area, though those low-to-high pass filter controls are definitely a welcome addition.

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