Patent ID: 8102282

Claim:
An encoding method for a microdot matrix, comprising: in a data region comprised in each of a plurality of microdot blocks comprised in a microdot matrix, defining a first coordinate axis and a second coordinate axis of the microdot matrix; dividing the data region of each microdot block into a first coordinate code region and a second coordinate code region; and respectively encoding a first coordinate code and a second coordinate code by encoding based on Reflected Gray Codes according to a position of each microdot block on the microdot matrix, and forming a plurality of microdots in the first coordinate code region and the second coordinate code region according to the encoded first coordinate code and second coordinate code; wherein the first coordinate code corresponds to a coordinate of the first coordinate axis of the microdot block on the microdot matrix while the second coordinate code corresponds to a coordinate of the second coordinate axis of the microdot block on the microdot matrix; wherein the microdots corresponding to lower order bits of the Reflected Gray Codes are formed as the outmost microdots in the data region.