After the threshold operation, morphologic operation and connected region area measurement are introduced to solve the background disturbance problem.
减背景操作后，用形态学方法和检测连通域面积进行后处理，消除噪声和背景扰动带来的影响；
The extraction algorithm of underwater objects based on wavelet edge detection is proposed to extract objects from complicated background combined with mathematics morphologic operation.
提出了基于小波多尺度边缘检测的水下图像处理算法，结合数学形态学运算和区域分割算法，把目标从背景中提取出来。
They are average value filtering, medium value filtering, math morphologic operations including unlock operation and close operation and how to extracting image's contour line, skeleton, and so on.
例如均值、中值、滤波过程，数学形态学运算中的开启、闭合，以及图像的轮廓线、骨架线的提取技术等。
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