1 Generation of chaotic images
2. Identification and informatization of chaotic anti-counterfeiting marks
3 Extracting eigenvalues using complexity algorithm
π is a string of characters SQ minus the last character, and then see if Q belongs to the existing "word" in the SQ
π
string. If it has, then add this character at the end and call it "copying". If it has not appeared before, then call it "insertion". When "inserting", use a "." to separate the front and back. The next step is to treat all the characters before the "." as S, and repeat the above steps. For example, the complexity of the sequence 0010 can be obtained by the following steps:
π
= 0, Q belongs to SQ
π
→ 0.0.
π
= 00, Q does not belong to SQ
π
→ 0.01.
π
= 001, Q belongs to SQ
π
→ 0.01.0. In this case c(n) = 3. For example, the symbol sequence 0000... should be the simplest, and its form should be 0.0000..., c(n) = 2. The symbol sequence 01010101... should be 0.1.0101..., c(n) = 3.
When the deviation from 1 is very close, the symbol string is considered to be a string with higher complexity, that is, a random string; otherwise, it is considered that there is a certain pattern in the symbol string.
4 Application of Chaotic Anti-Counterfeiting Marking
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