Data sequences comprised of figure-coded units, such as text comprised of ASCII characters, are encoded into another data entity, such as a pixel based image. The encoding implements a positionally-based encoding scheme in which values of the data entity (basic matrix) upon which the data sequences are...http://www.google.com.hk/patents/US6301360?utm_source=gb-gplus-share專利 US6301360 - Method of encoding information using a position-based encoding scheme
