The SDK includes: Ø PtImageRW -Image file reading/writing. Ø PtPDF417Encode -PDF417 symbol writing Ø PtPDF417Decode -PDF417 symbol reading. Ø PtQREncode -QR Code symbol writing. Ø PtQRDecode -QR Co

矩阵的QR分解，矩阵分解中一个非常重要的分解原理。-QR decomposition of the matrix, the matrix decomposition decomposition of a very important principle.

在最不重要位替换嵌入算法的基础上引入矩阵编码，增强水印隐蔽性，有效地提高水印嵌入效率。-On the basis of the least significant bit embedded algorithm is introduced to Replace the matrix coding, to enhance hidden watermark, the watermark embedding effectively improve efficiency.