The Research on Anti-counterfeiting of Fractal Graphics in Color Printing Based on Escape Time Algorithm of Julia-set

Fractal graphics based on escape time algorithm of Julia-set are studied in the paper for the application of anti-counterfeiting in color printing. Different parameters of Julia-set make anti-counterfeiting space difficult to search. Therefore anti-counterfeiting in color printing based on Julia-set is implemented. A novel approach of anti-counterfeiting space based on color and shape is proposed for anti-counterfeiting in color printing. This approach is applied to analyze anti-counterfeiting capacity of fractal graphics based on Julia-set. Firstly, anti-counterfeiting space of RGB color is estimated from fractal graphics of Julia-set. Anti-counterfeiting space is generated on basis of RGB color and graph size. Then, anti-counterfeiting space of shape which is generated by parameters changing enlarges anti-counterfeiting space based on fractal graphics of Julia-set. Different parameters lead to different shape of fractal graphics to a great extent. Experimental results demonstrate that higher anti-counterfeiting capacity of color printing can be achieved with the proposed approach.