Trend of prepress processing and plate making technology and information communication and share and integration between multimedia is presented in the light of new products and technolgies at Drupa 2000,it is shown that print media has become an important output unit of digitized society,demand on print media is continuously increasin

Effects on frequency aliasing during prepress processing are analyzed and discussed according to the theory of digital signal processing, and some methods are given to improve the output quality of images, graphics and characters by using anti aliasing techniques, which can be used to guide the actual reproduction.

This article explains with the cases of the prepress processing of the Chinese-traditional version periodical published in the China s mainland,analiyses the quality of the conversion methods of the Chinese simple and traditional character and discusses the characteristic and merit of the self-made software which benefits the artificial intervention during the actual work.

The component of cotton dyeing pretreatment wastewater is very complex,including lots of pollutants.

After comparing and studing many methods used in finger prints and maps processing ,this paper presents some new methods as follows: Ⅰ The orientation average filter to remove noise, Ⅱ Neural network for image binary, Ⅲ The extraction of finger prints characters, Ⅳ The extraction of the map elements, Ⅴ The cubic spline interpolation multilayer superposition to restore the grey level maps.