JP2008162248A5

JP2008162248A5 -

Info

Publication number: JP2008162248A5
Application number: JP2007000444A
Authority: JP
Filing date: 2007-01-05
Publication date: 2010-01-14

Claims

A print head having nozzles for printing dots by discharging ink onto a medium used for printing;
Printing image data acquisition means for acquiring printing image data having image information of gradation number M (M is a natural number of M ≧ 2);
The image of the image data for printing is based on information indicating the type of image element constituting the image of the image data for printing and print density information which is information on the print density preset for each type of the image element. Print density changing means for changing the print density of
Printing means for printing the image on the medium by the print head based on the print image data after changing the print density;
The print density information is information in which the maximum print density of the image element whose type belongs to a character is set to a print density higher than the maximum print density of an image element whose type belongs to other than a character. Printing device to do.

The print density changing unit is configured to print the print image data based on the print density information and the background density when the image of the print image data includes an image element belonging to a character whose type has a background. The printing apparatus according to claim 1, wherein a printing density of an image element portion belonging to the character having the background in the image is changed.

The print density information is a color conversion information table used for color conversion processing of the image data for printing set for each type of the image element,
2. The print density changing unit is configured to change a print density of an image of the print image data based on the color conversion information table during a color conversion process on the print image data. Item 3. The printing apparatus according to Item 2.

The print density changing unit is configured to perform color conversion processing before or after color conversion processing of the printing image data.
The printing apparatus according to claim 1, wherein the printing density changing process is executed on the printing image data.

The print density information is a process of converting image information of the number of gradations M of the print image data set for each type of image element into image information of the number of gradations N (M ≧ N ≧ 2). It is threshold information used for a certain N-value process,
2. The print density changing unit is configured to change a print density of an image of the print image data based on the threshold information during an N-value process for the print image data. Item 3. The printing apparatus according to Item 2.