In this paper, a direct edge detection method which combines filtering and detecting is introduced. The edge detection is based on adaptive stack filter.

本文介绍了一种边界直接检测法，即将边界检测与噪声滤波相结合，它是基于自适应堆滤波的边界检测法。

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Knight's Direct Edge got a minority investment earlier this month from Chicago-based hedge fund Citadel.

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The Commission sanctioned the Direct Edge entities for violations of the federal securities laws.

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Major competitors are Nasdaq OMX, CME Group, BATS Global and Direct Edge.

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