| Abstract:Paper formation is one of the most important factors influencing paper quality, as almost all physical properties, optical properties and printing performance are influenced by paper formation. The mathematical model of paper formation was established by using gradient method to deal with the image filtered in the Fourier domain. In order to improve computing speed, in gradient analysis the method by using Roberts operator to replace differential was used. Compared the results of this model with the indexes of standard formation and visual evaluations’, this method was simple and high speed of calculation, and it could remove noise effectively. It not only reflected the slightly changes of paper local basis weight, but also the changes of whole basis weight. The results of this model agreed with human visual evaluations’and the indexes of standard formation very well. |
