需求的详细内容见demand文件夹
算法的核心难点是椭圆印章的绘制，该印章需求可见ellipse
##环境配置(ubuntu)
将项目拉下来后，到该项目文件夹下运行
./install.sh
即可完成环境配置
##算法的实现
核心算法分为前台和后端
###后台
后台使用django建立一个app来专门绘制印章，也方便以后迁移到项目中，算法核心涉及根据字数算出文字的长和宽，文字的坐标，文字旋转的角度，最后将结果以json字符串的形式发送给前台。
其中会涉及的核心技术主要是scipy和django，请使用前阅读以下文档：
###前台 前台使用canvas绘制,根据后台传来的json字符串，将印章绘制到页面上，canvas使用demo可见template文件夹下的demo.html
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