Automatic processing and automatic comparison method and system for CDR (CorelDraw) file

Abstract

The invention provides an automatic processing and automatic comparison method and system for a CDR (CorelDraw) file. The automatic processing and automatic comparison method and system for the CDR file executes the conversion and the comparison of multiple concurrent processes, and the CDR file is quickly converted into a PDF (Portable Document Format) file; and whether the layout of the CDR file and the layout of the PDF file are consistent or not are automatically compared to find whether layout element loss or element state change is in the presence or not. In an automatic comparison process, the extraction of a layout object and the attribute state of the layout object is executed, the extracted layout object and the layout elements in the CDR file and the PDF file are subjected to matching identification, scanning comparison under different pixel units is carried out according to a matching result of the version object and the version elements, and the difference degree of the version object is judged.

Description

technical field [0001] The invention relates to a document pre-press processing technology in the printing process, in particular to a method and system for automatic processing and automatic comparison of CDR files. Background technique [0002] A CDR file is a vector graphics file that is exported after using CorelDRAW software for drawing and layout design. Generally, what the co-printing factory obtains from the designer is the CDR file, and the printing machine equipment usually accepts the PDF file as the accepted standard format, so the printing factory needs to convert the CDR file into a PDF file through prepress processing. [0003] Both CDR files and PDF files are vector graphics files, that is, the layout elements such as text, lines, pictures, tables, page margins, and overlays in the design layout are defined by layout elements. In the CDR file and the PDF file, parameters describing the type, position, shape, size, etc. of each layout element are recorded. F...

AI Technical Summary

Problems solved by technology

[0009] One is that the amount of calculation is large, and the result of the comparison is slow

Moreover, the smaller the pixel unit extracted for each comparison calculation, the more difficult it is for the comparison result to be calculated quickly

If the finest pixel-by-pixel comparison is used, there will be a very long waiting time before the final comparison result is displayed, which often does not meet the actual work efficiency requirements

[0010] The second is the high rate of false alarms, that is, errors are reported even when the layout of the source file and the converted file are consistent

If we use pixel block scanning with relatively poor fineness, the above-mentioned problem of high false alarm rate can be alleviated, but the probability of false alarm will increase significantly

[0011] It can be seen that in the prior art, whether it is the relatively common manual comparison or the relatively seldom used automatic comparison, there are certain defects, and there are still areas to be improved in terms of reliability and work efficiency

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