为了提取区域边界，可以对图像直接运用一阶微商算子或二阶微商算子，然后根据各像点处的微商幅值或其他附加条件判定其是否为边界点。如果图像中含有较强噪声，直接进行微商运算将会出现许多虚假边界点。-.Using the feature of distinct edge contour existing between the text and the background regions in color images, a novel text extraction algorithm—CEMA(Co

该程序是OPENGL小程序，画出一个花瓶，能控制旋转，可以填充颜色，变化边宽的大小和颜色。点击右键进行设置。-The program is small OPENGL procedures, draw a vase that can be controlled by rotation, to be filled with color, edge width changes in the size and colors. Right-click set.