Aiming at characteristic differences of background and target, four-direction gradient is extracted out and areas with large gradient are smoothed by a linear threshold filter.
针对复杂背景及目标的分形特性差异，提取图像四个方向的灰度梯度，选择最小梯度大于阈值的区域进行平滑滤波，最后对分维参数进行分段线性拉伸。
The body of a neuron. Acts approximately as a linear threshold element.
神经元的本体，其作用近似于一种线性阀值器件。
The body of a neuron. Acts approximately as a linear threshold element.
神经元的本体，其作用近似于一种线性阀值器件。
The body of a neuron. Acts approximately as a linear threshold element.
神经元的本体，其作用近似于一种线性阀值器件。
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