Printing plate producing method for printing press i.e. sheetfed offset press, involves providing data files, and determining number of elements, where values of elements are changed by evaluating regions within data fields

摘要

The method involves providing data files with data needed for screening image data, prior to screening the image data for a subsequent exposure of printing forms. The data is changed such that values of individual elements in two-dimensional data fields are changed. A number of elements are determined, where values of the elements are changed by evaluating regions within the data fields. Image datasets subdivided into micro-areas are produced. The micro-areas with pixels having the same size as an integer multiple or an integer part of a size of pixels of a screened image are defined.