运动动作图像正确姿态轮廓提取方法对比研究

Comparative study on extraction methods of correct pose contour in moving action image

由于目标轮廓提取方法一直存在正确姿态轮廓提取不准确的问题,提出两种新的运动动作图像正确姿态轮廓提取对比方法。通过相邻帧差法对运动动作图像正确姿态区域进行提取,在此基础上介绍了snake模型方法,其将运动动作图像正确姿态轮廓的提取问题转换成求解能量函数的极小化问题。分析了水平集方法,将演化曲线隐性地描述成运动动作图像上的三维连续函数曲面的零水平集,当水平集函数为0时,得到的结果即为轮廓提取结果。通过实验对比所提两种方法的有效性,发现snake模型方法的轮廓提取效果、完成性和信息丢失程度虽然优于其他方法,但劣于水平集方法。

The traditional method of target contour extraction has the problem of incorrect pose contour extraction.Two new comparative methods of correct posture contour extraction for moving action image are proposed,in which the adjacent frame difference method is used to extract the correct pose region of the moving action image.The snake model method is introduced to convert the correct pose contour extraction from moving action image into the solving of energy function minimization.The level set method is analyzed,in which the evolution curve is implicitly described as the zero level set of the 3D continuous function surface on the moving action image.When the level set function is zero,the obtained result is deemed as the contour extraction result.By comparing the effectiveness of the two methods,it is found that the snake model method is better than other methods in the aspects of contour extraction effect,completeness and information loss rate,but is inferior to the level set method.