运用css3技术实现的在线涂鸦画板，可画线、画图形和图案，可擦除重新画，支持rgb亮度和对比度调节，还可以高斯模糊处理等功能-The use of CSS3 technology to achieve online graffiti drawing board, draw lines, draw shapes and patterns can be erased redrawn support RGB brightness and contrast adjustment, you can also Gaussian blur processing and other functions