A printing data processing method

Abstract

The invention provides a print data processing method. The print data processing method comprises the following steps: converting an original document format of a page to be printed into a 24-bit BMP bitmap by an upper computer; newly constructing two 8-bit BMP bitmap cache regions, two 1-bit BMP bitmap cache region and two JBIG (Joint Bi Level Image Group) document cache regions by the upper computer; performing pixel judgment on the 24-bit BMP bitmap by the upper computer, and converting the 24-bit BMP bitmap into one red 8-bit BMP bitmap and one black 8-bit BMP bitmap; performing image optimization processing on the red 8-bit BMP bitmap and the black 8-bit BMP bitmap by the upper computer; performing image compression processing on a red 1-bit BMP bitmap and a black 1-bit BMP bitmap by the upper computer; and transmitting red JBIG documents and black JBIG documents to a lower computer by the upper computer, processing print data of the lower computer and finishing the red and black dual-color printing. The print data processing method provided by the invention has the advantages of being high in print data processing efficiency, low in cost of consumable and good in red and black staining degree.

Description

technical field [0001] The invention belongs to the technical field of print data processing, and in particular relates to a print data processing method. Background technique [0002] Printers are the most commonly used office output devices for printing black and white text as well as color pictures. In the daily work of special customers such as domestic government agencies, red-headed documents are frequently exchanged, and a color printer is required to make red-headed documents. [0003] Taking a color laser printer as an example, a complete printing data processing process is usually completed by four steps: first, convert the original file, such as doc, txt, and html files, into a BMP bitmap file; Image model conversion, convert the BMP bitmap file (RGB model) into a color printer special file (CMYK model); again, divide an image into four images, representing the toner of the four colors of cyan, magenta, yellow and black respectively Ratio, through USB or Etherne...

AI Technical Summary

Problems solved by technology

As the toner of one of the colors is exhausted, the printed red color gradually deviates, which cannot meet the production needs of red-headed documents

But other colors of drum powder use less, and problems such as agglomeration will occur if left for a long time, resulting in waste of consumables

In addition, the above-mentioned print data processing process is very complicated, not only need to convert the format and color model, but also need to divide one image into four images, the amount of data is large, the amount of calculation is large, and it takes up more PC resources and larger The storage space of the printer is too large, resulting in a longer data processing process and a slower printing rate

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