Document with indexes and associated document reader system

A document with indexes which is constructed by printing plural pixels and is divided into plural areas, the pixels having YMCK pixels obtained from performing an RGB to YMCK conversion on an RGB image, each area having plural indexes to represent an area code corresponding to an area, the indexes being mixed with the plural pixels for being printed on the document, the indexes being readable by an optical reader system, wherein each of the indexes comprises:

• a center dot being on a center of the index;
• plural direction dots distributed respectively on a first distance from the center dot, one of the direction dots being a direction recognition dot to indicate a start of indexing and form a direction of indexing by connecting the direction recognition dot and the center dot as a line;
• and
• plural first data dots distributed respectively on a second distance from the center dot, wherein the second distance is greater than the first distance.