A Study of Information Hiding Performance Using Simple Dot Pattern with Different Tile Sizes

There are several proposed techniques on the information hiding for printed document. Most of them detect embedded information using directional components which consists of a line element or group of dots. Therefore those techniques have serious problems regarding a visual quality and information capacity. In this paper, we use single dot pattern instead of the line element or group of dots. It is turned out that information capacity is improved for its small amount of dot and compact embedded area. We acquire possible information capacity 50688 bits in business card size with 93.45% information extraction accuracy. This information capacity is more than six times bigger than the conventional technique.