Print control apparatus and print control program using compression processing

摘要

A print control apparatus including an image acquisition unit for acquiring an image file including on one page a plurality of sets of image data of a raster format for representing an object, a compression processing unit for selecting methods of compression to apply to each of the plurality of sets of image data from among a plurality of methods of compression, in accordance with the properties of the image data, and compressing each of the plurality of sets of image data by the respectively selected methods of compression, a PDL data generation unit for generating PDL data, which is PDL data in which a command to print the image file is described by a page description language and which includes the plurality of sets of compressed image data, and a transfer unit for transferring the generated PDL data to a print unit.

主权项

1. A print control apparatus, comprising:
an image acquisition unit configured to acquire an image file including on one page a plurality of sets of image data of a raster format for representing an object; a compression processing unit configured to select methods of compression to apply to each of the plurality of sets of image data from among a plurality of methods of compression, in accordance with the properties of the image data, and compressing each of the plurality of sets of image data by the respectively selected methods of compression; a PDL data generation unit configured to generate PDL data, which is PDL data in which a command to print the image file is described by a page description language and which includes the plurality of sets of compressed image data; and a transfer unit for transferring the generated PDL data to a print unit, the compression processing unit being further configured to repeatedly select methods of compression for each of the plurality of sets of image data, wherein in a case where first image data and second image data included in the plurality of sets of image data are adjacent to one another, then the compression processing unit selects, for a range in the first image data of a part that is adjacent to the second image data and a range in the second image data of a part that is adjacent to the first image data, a third method of compression different from both a first method of compression selected for the first image data and a second method of compression selected for the second image data, and compresses the range for which the third method of compression is selected by the third method of compression.