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

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 determin...

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description 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. Vor dem Schritt des Rasterns der Bilddaten für die anschließende Belichtung der Druckformen werden für den Schritt des Rasterns benötigte Dateien derart verändert, dass die Werte von einzelnen Elementen in den Datenfeldern geändert werden. Die Anzahl der Elemente, deren Werte geändert werden, erfolgt durch eine Auswertung zusammenhängender Bereiche innerhalb der Datenfelder. Hierbei kann es sich beispielsweise um Schwellwertmatrizen handeln, in denen einzelne Matrixelemente auf einen der Farbe Weiß entsprechenden Wert gesetzt werden.
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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. Vor dem Schritt des Rasterns der Bilddaten für die anschließende Belichtung der Druckformen werden für den Schritt des Rasterns benötigte Dateien derart verändert, dass die Werte von einzelnen Elementen in den Datenfeldern geändert werden. Die Anzahl der Elemente, deren Werte geändert werden, erfolgt durch eine Auswertung zusammenhängender Bereiche innerhalb der Datenfelder. 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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
title 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
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