ZXing是一个开源Java类库用于解析多种格式的1D/2D条形码。目标是能够对QR编码、Data Matrix、UPC的1D条形码进行解码。 -ZXing is an open source Java class library used to resolve a variety of formats 1D/2D bar code. Goal is to be able to QR codes, Data Matrix, UPC' s 1D bar code decoding.

Numerical calculation method of the source program, including the numerical algebra some most basic code. Including the gaussian elimination method is used to solve the equations, the iterative method, QR decomposition -Numerical calculation method

对QR二维码进行编码和解码，官方源码，并附有相关实例，值得学习-QR-dimensional code for encoding and decoding, the official source, along with relevant examples, it is worth learning

Google 开源QR开发代码，最新版，嘻嘻(Google open source QR development code)