US 2003/0112293 A1 · Recording apparatus, recording method therefor and program therefor

Abstract

Coordinates in an image and its corresponding color-converted data are supplied to a control/operation portion for every pixel. Quantization is applied to each color. The quantization is carried out so that a kind of dot for at least one color is made different from kinds of dots for the others in one and the same pixel when dots for different colors are superimposed on the pixel. The control/operation portion refers to a two-dimensional matrix on the basis of the quantization result, determines an output dot for each color, and converts the data into data which can be processed by a printer. The printer records an image based on the quantization result while reciprocating a recording head. Thus, it is possible to reduce color shift caused by the difference of the ink landing order at the time of reciprocating the head for recording.

Claims18

Dependent claims

A recording apparatus comprising:

a recording head capable of forming a plurality of kinds of dots, which are different from each other in density, per unit area for every single color by means of at least one of area coverage modulation and density modulation, the recording head ejecting a plurality of colors;
an input section for inputting image data having a gradation value for every pixel;
and
a quantization section for quantizing the inputted image data so that:
number of pixels in which the kind of dot for at least one color is different from the kinds of dots for the other colors in one and the same pixel is higher than number of pixels on which dots having the same kind are superimposed;
and
macroscopic hue is equal to a case in which dots having the same kind are superimposed in all pixels,
wherein the recording head is reciprocated to record on a recording medium based on a quantization result obtained by the quantization section.

5 more elements

A method for recording in a recording apparatus having a recording head capable of forming a plurality of kinds of dots, which are different from each other in density, per unit area for every single color by means of at least one of area coverage modulation and density modulation, the recording head ejecting a plurality of colors, the method comprising the steps of:

inputting image data having a gradation value for every pixel;
carrying out quantization so that:
number of pixels in which the kind of dot for at least one color is different from the kinds of dots for the other colors in one and the same pixel is higher than number of pixels on which dots having the same kind are superimposed;
and
macroscopic hue is equal to a case in which dots having the same kind are superimposed in all pixels;
and
recording on a recording medium based on a quantization result obtained by the quantization step while reciprocating the recording head.

4 more elements

A program for a recording apparatus having a recording head capable of forming a plurality of kinds of dots, which are different from each other in density, per unit area for every single color by means of at least one of area coverage modulation and density modulation, the recording head ejecting a plurality of colors, the program making the recording apparatus execute the steps of;

inputting image data having a gradation value for every pixel;
carrying out quantization so that:
number of pixels in which the kind of dot for at least one color is different from the kinds of dots for the other colors in one and the same pixel is higher than number of pixels on which dots having the same kind are superimposed;
and
macroscopic hue is equal to a case in which dots having the same kind are superimposed in all pixels;
and
recording on a recording medium based on a quantization result obtained by the quantization step while reciprocating the recording head.

4 more elements

Dependencies are inferred from the claim text.

Recording apparatus, recording method therefor and program therefor

Life of this patent

Recording apparatus, recording method therefor and program therefor

Life of this patent

Abstract

Claims18