公开(公告)号：US20040047666A1

公开(公告)日：2004-03-11

申请号：US10637661

申请日：2003-08-11

Applicant: MINOLTA CO., LTD.

Inventor： Shoji Imaizumi ,  Yoshihiko Hirota ,  Hiroshi Sugiura ,  Toshio Tsuboi

IPC: B41J011/44

CPC classification number: G06T5/006 ,  H04N1/047 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/506 ,  H04N2201/03162 ,  H04N2201/0471 ,  H04N2201/04717 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04787 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04793

Abstract: Image distortion is corrected in a color printer wherein print units for a plurality of colors are aligned to form a color image by superposing images formed by the print units. A quantity of image distortion is detected, and correction data of main scan address and subscan address are calculated and stored according to the detected image distortion for each main scan address. When input color image data are corrected, printing position is corrected in combination of address change with density interpolation. When the correction data exceeds the maximum correction range, the correction data are replaced by the maximum in the correction range to utilize the capability of the distortion correction of the printer. Further, in the image data correction, after the image data are converted to data having a smaller number of gradation levels, the data are delayed according to the serial arrangement of the print units. Then, the delayed data are converted again for printing.

Abstract translation: 在彩色打印机中校正图像失真，其中通过叠加由打印单元形成的图像来对准用于多种颜色的打印单元以形成彩色图像。 检测到一定数量的图像失真，根据检测到的每个主扫描地址的图像失真来计算并存储主扫描地址和副扫描地址的校正数据。 当输入彩色图像数据被校正时，打印位置与地址变化与密度插值的组合被校正。 当校正数据超过最大校正范围时，校正数据被替换为校正范围中的最大值，以利用打印机的失真校正的能力。 此外，在图像数据校正中，在将图像数据转换为具有较少灰度级数的数据之后，根据打印单元的串行排列来延迟数据。 然后，再次转换延迟数据进行打印。