JP2006192892A5 - - Google Patents

Claims (9)

An inkjet recording apparatus that records an image on the recording medium by ejecting ink droplets from the nozzle while scanning a recording head in which a plurality of nozzles are arranged relative to the recording medium,
Scanning means for scanning the recording head relative to the same recording area of the recording medium a plurality of times;
In order to divide the image data corresponding to the same recording area into image data to be recorded in each of the plurality of scans, thinning means for thinning out the image data corresponding to the same recording area;
Recording control means for completing an image to be recorded in the same recording area by recording a thinned image in the same recording area according to the image data thinned out by the thinning means in each of the plurality of scans And
The thinning means thins out the image data to be recorded in the plurality of the same recording areas that the recording head passes during one scanning alternately at high and low different thinning rates in the nozzle arrangement direction. An ink jet recording apparatus. An inkjet recording apparatus that records an image on the recording medium by ejecting ink droplets from the nozzle while scanning a recording head in which a plurality of nozzles are arranged relative to the recording medium,
Scanning means for scanning the recording head relative to the same recording area of the recording medium a plurality of times;
Conversion means for converting multivalued image data corresponding to each pixel constituting an image to be recorded in the same recording area into binary image data;
Thinning means for thinning out binary image data corresponding to the same recording area using different mask patterns corresponding to each of a plurality of scans for the same recording area;
An image to be recorded in the same recording area is completed by recording a thinned image in the same recording area based on the binary image data thinned out by the thinning means in each of the plurality of scans. Recording control means,
Each of the different mask patterns includes a first region that thins out the binary image data at a relatively high thinning rate and a second region that thins out at a relatively low thinning rate in the pixel arrangement direction. An ink jet recording apparatus, wherein the ink jet recording apparatus is repeatedly arranged in a unit of a width that is an integral multiple of the width of.   The inkjet recording apparatus according to claim 2, wherein the conversion unit converts the multivalued image data into the binary image data by assigning a dot concentration type dot arrangement pattern to the pixels. .   The inkjet recording apparatus according to claim 2, wherein a position of a boundary between the first area and the second area in the nozzle arrangement direction varies depending on a position in the scanning direction.   The inkjet recording apparatus according to claim 4, wherein the position of the boundary is displaced stepwise along the scanning direction.   The inkjet recording apparatus according to claim 1, wherein the position of the boundary is displaced in a waveform along the scanning direction.   3. The mask pattern includes a plurality of types of first regions having different widths in the nozzle arrangement direction and a plurality of types of second regions having different widths in the nozzle arrangement direction. 2. An ink jet recording apparatus according to 1. An inkjet recording method for recording an image on the recording medium by ejecting ink droplets from the nozzle while scanning a recording head in which a plurality of nozzles are arranged relative to the recording medium,
A scanning step of relatively scanning the recording head a plurality of times with respect to the same recording area of the recording medium;
In order to divide the image data corresponding to the same recording area into image data to be recorded in each of the plurality of scans, a thinning-out process of thinning out the image data corresponding to the same recording area;
A recording step of recording an image to be recorded in the same recording area by recording a thinned image in the same recording area in accordance with the image data thinned out by the thinning process in each of the plurality of main scans. And
In the thinning-out step, image data to be recorded in the plurality of the same recording areas through which the nozzle array of the recording head passes during one scan are alternately arranged at different thinning rates at high and low in the nozzle arrangement direction. An ink jet recording method characterized by thinning. An inkjet recording method for forming an image on the recording medium by ejecting ink droplets from the nozzle while scanning a recording head having a plurality of nozzles arranged relative to the recording medium,
Scanning the recording head relative to the same recording area of the recording medium a plurality of times;
Converting multivalued image data corresponding to each pixel constituting an image to be recorded in the same recording area into binary image data;
Thinning out binary image data corresponding to the same recording area using different mask patterns corresponding to each of a plurality of scans for the same recording area;
Recording a thinned image in the same recording area based on the thinned binary image data in each of the plurality of scans, thereby completing an image to be recorded in the same recording area; Prepared,
Each of the different mask patterns includes an area in which recording of the binary image data is allowed and an area in which recording of the binary image data is not allowed, and the pixels are arranged in the nozzle arrangement direction. An ink jet recording method, wherein a portion having a relatively high ratio and a portion having a relatively low ratio occupied by the permissible recording area are repetitively arranged in a unit of a width that is an integral multiple of the width.