An external energy function is constructed from the information pertinence of local region between the serial images to eliminate the interference of texture and capture corner points completely.

• 另一方面，利用序列图像之间局部区域的信息相关性，重新构造外部能量函数来排除纹理特征的于扰，更好地捕捉到边缘上的拐角点。