Information code, information code producing method, information code reader, and system which uses information code

摘要: An information code producing apparatus produces a free space inside the region of an arranged on medium such as sheets paper. The is at position other than specification pattern regions. Data being interpreted, which are expressed by cells, not recorded in space. has preset size larger that single cell. detects this by, least, either selection from plurality candidate shapes prepared advance or input shape designating provided outside.