转变点 arrest point; change point; point of transformation; point of transition; tra formation point; tra ition point; transformation point; transition point; transition temperature; transition-point
After getting chain code in the stage of image segmentation , we introduce . the concept of chain code sum , and propose the method of detecting projective - invariant key points on the contour of airplane 随后在图像分割阶段得到链码的基础上,引入了链码和的概念,提出了利用三点链码和检测飞机边缘曲线上的透视不变点的方法。