公开(公告)号：US08564838B2

公开(公告)日：2013-10-22

申请号：US13119368

申请日：2009-09-14

申请人： Arata Yamaguchi ,  Hiroaki Sagae ,  Takashi Kimura ,  Masakazu Yoshida

发明人： Arata Yamaguchi ,  Hiroaki Sagae ,  Takashi Kimura ,  Masakazu Yoshida

IPC分类号： H04N1/40

CPC分类号： H04N1/52

摘要： An image processing apparatus quantizes multi-level image data of n colors, where n≧2, by performing an error diffusion processing. The image processing apparatus includes: a dot arrangement determining unit that determines either one of an essential dot count and an essential recording material amount when the multi-level image data of n colors is converted into multi-level image data of m colors, where n>m≧1, by the error diffusion processing; and a color arrangement determining unit that performs the error diffusion processing on each color component of the multi-level image data of n colors, calculates either one of a dot count and a recording material amount for each color component, and determines an arrangement of either one of the dot count and the recording material amount for each color component within a range of a corresponding one of the essential dot count and the essential recording material amount determined by the dot arrangement determining unit.

摘要翻译： 图像处理装置通过进行误差扩散处理来对n个颜色的多级图像数据进行量化，其中n≥2。 图像处理装置包括：点阵布置确定单元，当n个颜色的多级图像数据被转换成m个颜色的多级图像数据时，确定基本点数和基本记录材料量中的任一个，其中n > m> = 1，通过误差扩散处理; 以及颜色排列确定单元，对n种颜色的多级图像数据的每个颜色分量执行误差扩散处理，计算每个颜色分量的点数和记录材料量中的任一个，并且确定任一 在由点排列确定单元确定的基本点数和必要记录材料量的相应一个的范围内的每个颜色分量的点数和记录材料量之一。

公开(公告)号：US08326032B2

公开(公告)日：2012-12-04

申请号：US12760157

申请日：2010-04-14

申请人： Arata Yamaguchi ,  Hiroaki Sagae ,  Takashi Kimura ,  Masakazu Yoshida ,  Shigetaka Sakakibara

发明人： Arata Yamaguchi ,  Hiroaki Sagae ,  Takashi Kimura ,  Masakazu Yoshida ,  Shigetaka Sakakibara

IPC分类号： G06K9/00

CPC分类号： H04N1/52 ,  H04N1/4053

摘要： An image processing apparatus, which performs an error diffusion on M-value image data with an error weight matrix into N-value image data, includes: a corrected-value calculating unit that calculates a corrected value by adding a first value and a second value to a pixel value corresponding to a processing-target color component of a pixel of interest, the first value being obtained by multiplying an error for each quantized pixel of the processing-target color component by the matrix, and the second value being obtained by multiplying an error for each quantized pixel of a different color component by the matrix; a quantizing unit that compares the corrected value with a quantization threshold, and outputs N-value image data; and an error diffusion unit that calculates an error at the pixel of interest by subtracting a quantization threshold from a value obtained by adding the first value to the pixel value.

摘要翻译： 一种图像处理装置，其对具有误差加权矩阵的M值图像数据进行误差扩散，形成为N值图像数据，包括：校正值计算单元，其通过将第一值和第二值相加来计算校正值 相对于感兴趣像素的处理对象色彩分量对应的像素值，所述第一值通过将所述处理对象色彩分量的每个量化像素的误差乘以所述矩阵而获得，所述第二值通过乘以 由矩阵的不同颜色分量的每个量化像素的误差; 量化单元，其将校正值与量化阈值进行比较，并输出N值图像数据; 以及误差扩散单元，通过从通过将第一值与像素值相加而获得的值减去量化阈值来计算感兴趣像素处的误差。

公开(公告)号：US20110170141A1

公开(公告)日：2011-07-14

申请号：US13119368

申请日：2009-09-14

申请人： Arata Yamaguchi ,  Hiroaki Sagae ,  Takashi Kimura ,  Masakazu Yoshida

发明人： Arata Yamaguchi ,  Hiroaki Sagae ,  Takashi Kimura ,  Masakazu Yoshida

IPC分类号： H04N1/405

CPC分类号： H04N1/52

摘要： An image processing apparatus quantizes multi-level image data of n colors, where n≧2, by performing an error diffusion processing. The image processing apparatus includes: a dot arrangement determining unit that determines either one of an essential dot count and an essential recording material amount when the multi-level image data of n colors is converted into multi-level image data of m colors, where n>m≧1, by the error diffusion processing; and a color arrangement determining unit that performs the error diffusion processing on each color component of the multi-level image data of n colors, calculates either one of a dot count and a recording material amount for each color component, and determines an arrangement of either one of the dot count and the recording material amount for each color component within a range of a corresponding one of the essential dot count and the essential recording material amount determined by the dot arrangement determining unit.

摘要翻译： 图像处理装置通过进行误差扩散处理来对n个颜色的多级图像数据进行量化，其中n≥2。 图像处理装置包括：点阵布置确定单元，当n个颜色的多级图像数据被转换成m个颜色的多级图像数据时，确定基本点数和基本记录材料量中的任一个，其中n >m≥1，通过误差扩散处理; 以及颜色排列确定单元，对n种颜色的多级图像数据的每个颜色分量执行误差扩散处理，计算每个颜色分量的点数和记录材料量中的任一个，并且确定任一 在由点排列确定单元确定的基本点数和必要记录材料量的相应一个的范围内的每个颜色分量的点数和记录材料量之一。

公开(公告)号：US10086603B2

公开(公告)日：2018-10-02

申请号：US15409772

申请日：2017-01-19

申请人： Yoshitomo Kobayashi ,  Hiroaki Sagae

发明人： Yoshitomo Kobayashi ,  Hiroaki Sagae

IPC分类号： B41J2/21 ,  B41J2/045 ,  B41J2/205

摘要： A method is for processing image data for recording by an image forming apparatus that discharges ink droplets from a plurality of nozzles. The method includes reading out image data corresponding to one line constituted by a series of dots aligning in a main scanning direction. The method further includes calculating a faulty discharge error, which occurs at a non-discharge position on a line at which no ink droplet is discharged from a defective one of the plurality of nozzles. The method further includes controlling distribution of the faulty discharge error to a line that is downstream relative to a line on which the non-discharge position occurs according to a limit setting that limits distribution of the faulty discharge error.