Software for Filtering Roughness of Paper Surface

Filtering profile is one of the important stages of evaluation of the surface profile of the paper. The term ‘filtration’ should be understood as the methods (electrical, optical, mechanical, mathematical) to select the necessary information from the general profile of the surface. The impact of interference, especially emanating from the environment is inevitable when recording profiles. Above that, to level completely the device error of the test sample it is necessary to spend a large amount of time. Therefore, it is necessary to develop a mathematical model for the filtration of roughness of the surface paper profile. Goal of the research: to develop a technique for digital processing of paper surface profilographs to the further identifying the relation between the paper parameters and quality of the prints. The mathematical approach based on Gaussian filter and the analysis of profilograms obtained by the contact and optical methods of profilometry were used. It was developed software on the basis of Free Pascal software package as well. In order to provide the experimental investigations, profilograms of surfaces of various types of paper obtained in previous studies using a profilometer with an inductive converter, model 296 were used. Software for filtering the roughness of the surface profile of unprinted or printed paper using Gaussian filter, which allows to receive profilograms, eliminating in the profile the factors such as obstacles and errors caused by random vibrations, as well as to calculate the relevant roughness indexes, and to identify in the future the interaction with the quality of the prints on this paper.