In outlinerecognition, to reduce the misjudge result from calculated error of the core position, reference frame transform and second derivative of curve were adopted.
轮廓识别采用坐标变换及曲线求二阶导数，避免了果核位置判断误差造成的误判。
2
This paper introduces usual method for keeping curves in computer and usual method of outline extraction in image recognition.
介绍了数字图像处理中计算机存贮曲线的常用方法和图像识别中常用的轮廓提取法。
3
An outline of basic meanings and main methods about machine learning and face recognition is given.