html canvas图片裁剪
http://www.2cto.com/kf/201407/313926.html
贝塞曲线
http://blog.csdn.net/zhangci226/article/details/4018449
详细教程
http://www.cnblogs.com/dxy1982/archive/2012/04/06/2395729.html
经典博客
http://www.gbtags.com/gb/tag/4.htm
心形图片墙
http://www.codefans.net/jscss/code/5025.shtml
心形
http://www.html5tricks.com/demo/html5-heart-beta-animation/index.html