Traditionally

bar codes are captured and recognized by industrial scanner In recent years

with the development of mobile value-added services and 3G technology

the application of two-dimensional bar codes in mobile phones develops rapidly Taking Data Matrix as an example

the recognition technology of the two-dimensional bar code for embedded mobile phones is researched in this paper First

a fast bar codes detection algorithm based on chain code tracing and line detection is proposed according to the character of Data Matrix Then the model of blurred bar code signal caused by the point spread function is analyzed

and Wiener filter is used to recover the signal At last

aiming at perspective geometrical distortion

a fast inverse perspective transformation algorithm is designed

which is suitable for embedded mobile phones The experimental results show that the performance of the algorithm proposed in this paper is excellent It can achieve higher recognition rate and faster speed

which suffices to the requirement of the practical use