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1.发明授权Image forming apparatus which excels in reproducibility of colors, fine lines and gradations even in a copy made from a copied image 失效图像形成装置即使在由复印图像制成的复印件中也能够在颜色，细线和灰度的再现性方面表现出色公开(公告)号：US06388768B2
公开(公告)日：2002-05-14
申请号：US09020281
申请日：1998-02-09
IPC分类号： B41B100
CPC分类号： H04N1/6033 , G03G15/01 , G03G2215/00042 , G03G2215/00063 , G03G2215/018 , H04N1/4078
摘要： An image forming apparatus for forming an image with few defects even when making a copy from a copied image. When forming an image, a standard pattern is formed outside the image forming area in accordance with standard pattern data for color correction. When reading the image together with the standard pattern formed above, the color correction conditions for the image data are modified in accordance with the comparison result between the read standard pattern data and the standard pattern data for color correction. Copying is then performed on a copying paper.
摘要翻译： 一种图像形成装置，即使在从复印图像进行复制时也可以形成缺陷少的图像。 当形成图像时，根据用于颜色校正的标准图案数据，在图像形成区域外部形成标准图案。 当与上述形成的标准图案一起读取图像时，根据读取的标准图案数据和用于颜色校正的标准图案数据之间的比较结果来修改图像数据的颜色校正条件。 然后在复印纸上进行复印。
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公开(公告)号：US6028957A
公开(公告)日：2000-02-22
申请号：US812811
申请日：1997-03-06
CPC分类号： G06T5/20
摘要： Pixel data comprising density data of R, G, and B obtained by reading an original with a CCD image sensor are subjected to shading correction by a shading correction unit, and then converted into color region signals H*, V, and C* in the Munsell color space by a first converter. According to the variations of V, a region discriminator determines whether each pixel data belongs to an edge portion of the original image or whether it belongs to a uniform density region of the original image. A noise removing unit performs noise removal by performing smoothing on color region signals H*, V, and C* of the pixel data which have been determined to belong to uniform density regions. A second converter converts the noise-removed color region signals into pixel data of R, G, and B.
摘要翻译： 通过用CCD图像传感器读取原稿获得的包含R，G和B的浓度数据的像素数据通过阴影校正单元进行阴影校正，然后转换为颜色区域信号H *，V和C * 孟塞尔颜色空间由第一个转换器。 根据V的变化，区域鉴别器确定每个像素数据是否属于原始图像的边缘部分，或者它是否属于原始图像的均匀密度区域。 噪声去除单元通过对已经被确定属于均匀密度区域的像素数据的颜色区域信号H *，V和C *执行平滑来执行噪声去除。 第二转换器将噪声消除的颜色区域信号转换成R，G和B的像素数据。
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公开(公告)号：US5999279A
公开(公告)日：1999-12-07
申请号：US807746
申请日：1997-02-27
CPC分类号： H04N1/58
摘要： An image forming apparatus which forms an image according to image data made up of pixel data on colors of pixel constituting an original image, characterized by comprising a color region discriminator for determining to which color region each pixel data belongs, an image region discriminator for determining whether the pixel data belongs to a uniform density region or whether it belongs to an edge portion, a corrective condition deciding unit for determining MTF corrective conditions for the image data of each color region depending on the discrimination results of both the color region discriminator and the image region discriminator, and an MTF correction unit for performing MTF corrections on the image data according to the MTF corrective conditions determined by the corrective condition deciding unit.
摘要翻译： 一种图像形成装置，其根据由构成原始图像的像素的颜色的像素数据构成的图像形成图像，其特征在于包括：颜色区域鉴别器，用于确定每个像素数据属于哪个颜色区域;图像区域鉴别器，用于确定 是否像素数据属于均匀密度区域或是否属于边缘部分;校正条件判定单元，用于根据颜色区域鉴别器和色彩区域鉴别器的鉴别结果确定每个颜色区域的图像数据的MTF校正条件; 图像区域鉴别器和MTF校正单元，用于根据由校正条件判定单元确定的MTF校正条件对图像数据执行MTF校正。
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公开(公告)号：US5966222A
公开(公告)日：1999-10-12
申请号：US822354
申请日：1997-03-20
CPC分类号： H04N1/6027 , H04N1/6033
摘要： The individual pattern of each color of the standard pattern is printed on a copy being made, and when the copy is read by a scanner, the image data of the standard pattern are converted into color region signals in a uniform color space by an HVC converter and a C.multidot.H operation unit. In the case where the saturation of the image data has become lower than the standard saturation of the color region, saturation corrective coefficients are determined by a saturation corrective coefficient calculation unit. After the saturation coefficients have been determined for each color of the standard pattern, the image data of the original are read out, and the saturation corrective coefficients for the color region of the image data are used for saturation correction by a saturation correction processing unit. The image data which have been subjected to the saturation correction are reversely converted into the image data of each color by a reverse HVC converter. According to the reversely converted image data, an image is formed on a copying paper.
摘要翻译： 标准图案的每种颜色的单独图案被印刷在正在进行的副本上，并且当通过扫描仪读取副本时，标准图案的图像数据由HVC转换器转换成均匀颜色空间中的颜色区域信号 和一个CxH操作单元。 在图像数据的饱和度变得低于彩色区域的标准饱和度的情况下，饱和校正系数由饱和度校正系数计算单元确定。 在针对标准图案的每个颜色确定饱和系数之后，读出原稿的图像数据，并且通过饱和度校正处理单元将图像数据的颜色区域的饱和校正系数用于饱和度校正。 已经进行饱和校正的图像数据被反向HVC转换器反向转换成每种颜色的图像数据。 根据反向转换的图像数据，在复印纸上形成图像。
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公开(公告)号：US5715067A
公开(公告)日：1998-02-03
申请号：US610231
申请日：1996-03-04
CPC分类号： H04N1/40037
摘要： In a digital image forming apparatus, when a latent image is formed on a photoconductor, a light from a light source is emitted in a period of a duty ratio while modulated according to image data, and the latent image is developed and transferred onto a sheet of paper. The duty ratio, defined as a ratio of a light-emitting time of a light exposing the photoconductor to a period for exposing a dot, is changed in the same document according to dot information on the document such as an edge signal. In the modulation of the optical intensity, the light emission onto the photoconductor is performed with a duty ratio which may be set for each dot. Image portions formed with different duty ratios may exist at the same time in a reproduced image. For example, an edge portion in a document is reproduced at the duty ratio of 100% while a non-edge portion is reproduced at the duty ratio less than 100%.
摘要翻译： 在数字图像形成装置中，当在感光体上形成潜像时，根据图像数据调制来自光源的光在占空比的周期中发射，并且潜像显影并转印到片材上 的纸。 定义为曝光光电导体的光的发光时间与曝光点的时间的比率的占空比根据诸如边缘信号的文档的点信息在相同的文档中改变。 在光强度的调制中，以可以为每个点设置的占空比来执行光电导体上的发光。 形成有不同占空比的图像部分可以在再现图像中同时存在。 例如，以100％的占空比再现文档中的边缘部分，而以小于100％的占空比再现非边缘部分。
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公开(公告)号：US5933255A
公开(公告)日：1999-08-03
申请号：US610713
申请日：1996-03-04
CPC分类号： B41J2/471 , B41J2/525 , H04N1/40037
摘要： In a digital image forming apparatus, when a latent image is formed on a photoconductor by modulating optical intensity of laser beam, the laser beam is emitted in a period of a duty ratio while modulated according to image data, and the image is formed on a sheet of paper. This process is repeated for four colors for a color document. The duty ratio, defined as a ratio of a light-emitting time of a light exposing the photoconductor to a period for exposing a dot, is changed in the same document. For example, the light emission timing pattern is changed between odd and even lines. In another example, the light-emission timings may be changed at least for one of the reproduction colors. The light-emission timing patterns may be provided for each of reproduction colors. The light-emission timing patterns may be changed to have a constant or different screening angle between colors. Image quality of a half-tone image is improved by using such patterns.
摘要翻译： 在数字图像形成装置中，当通过调制激光束的光强度在感光体上形成潜像时，在按照图像数据进行调制的情况下，在占空比的周期内发射激光束，并且图像形成在 一张纸。 对于彩色文档，为四种颜色重复此过程。 定义为曝光光电导体的光的发光时间与曝光点的周期的比率的占空比在相同的文献中改变。 例如，发光定时图案在奇数行和偶数行之间改变。 在另一示例中，至少对于一种再现颜色可以改变发光定时。 可以为每种再现颜色提供发光定时图案。 发光定时图案可以改变为在颜色之间具有恒定或不同的屏幕角度。 通过使用这种图案可以提高半色调图像的图像质量。
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公开(公告)号：US5995248A
公开(公告)日：1999-11-30
申请号：US821364
申请日：1997-03-20
CPC分类号： H04N1/58 , H04N1/4092
摘要： A test pattern comprising a half-tone pattern portion and an edge pattern portion printed according to standard printing data is read by a CCD sensor. A pattern discriminator detects the positions of the half-tone pattern portion and the edge pattern portion. In accordance with a prescribed edge detection criteria using the primary differential data .DELTA.D of density determined by primary differential filters, the CPU determines whether the inputted image data correspond to a uniform density region or whether the inputted image data correspond to an edge portion. If the region discrimination result is different from the result of the pattern detection, the edge detection criteria are changed. The image data is then subjected to MTF correction, and conditions for smoothing or edge emphasizing are altered so that the difference between the corrected image data and the standard printing data remains within a allowable range.
摘要翻译： 由CCD传感器读取包括根据标准打印数据打印的半色调图案部分和边缘图案部分的测试图案。 模式鉴别器检测半色调图案部分和边缘图案部分的位置。 根据使用由初级差分滤波器确定的浓度的一次差分数据DELTA D的规定边缘检测准则，CPU确定输入的图像数据是对应于均匀密度区域还是输入的图像数据对应于边缘部分。 如果区域识别结果不同于模式检测的结果，则边缘检测准则被改变。 然后对图像数据进行MTF校正，并且改变用于平滑或边缘强调的条件，使得校正图像数据和标准打印数据之间的差异保持在允许范围内。
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8.发明授权Image forming apparatus, tone correction method using tone patches and alignment markers, and computer-readable recording medium recorded with a tone correction program using tone patches and alignment markers 有权图像形成装置，使用色调和对准标记的色调校正方法以及记录有使用色调和对准标记的色调校正程序的计算机可读记录介质公开(公告)号：US08112007B2
公开(公告)日：2012-02-07
申请号：US12205351
申请日：2008-09-05
IPC分类号： G03G15/00
CPC分类号： G03G15/5062 , G03G15/0131 , G03G2215/00067 , G03G2215/0161
摘要： The present invention aims to provide an image forming apparatus and the like that perform a highly-accurate tone correction in a relatively short time and includes the following: a pattern former, with use of each image forming unit, on a sheet, forming tone patches in the main or sub scanning direction (41k,c,y,m) and aligning markers, which indicate positions of the tone patches, in the same direction as the tone patches (42k,c,y,m); a pattern reader reading the sheet with the tone patches and markers formed thereon; a coordinate determiner determining coordinates of the tone patches in the direction of the aligned tone patches based on the read markers (42k,c,y,m); a density determiner determining densities of the tone patches (41k,c,y,m) read based on the determined coordinates; and an updating part updating the tone correction table based on relationships between the determined densities and tone levels.
摘要翻译： 本发明的目的在于提供一种在较短时间内执行高精度色调校正的图像形成装置等，其包括以下：使用各图像形成单元的图案形成装置，在片材上形成色调 在主扫描方向（或副扫描方向）（41k，c，y，m）和指示色调位置的对准标记与色调片（42k，c，y，m）的方向相同。 读取片材的图案读取器，其上形成有色调和标记; 坐标确定器，基于读取的标记（42k，c，y，m）确定对齐色调方向上的色调块的坐标; 确定基于所确定的坐标读取的色调块（41k，c，y，m）的密度的密度确定器; 以及更新部，基于确定的密度和音调级之间的关系来更新色调校正表。
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公开(公告)号：US20080292336A1
公开(公告)日：2008-11-27
申请号：US12219923
申请日：2008-07-30
申请人： Kazuomi Sakatani , Soh Hirota , Masahiro Kouzaki , Mitsuru Obara , Masaki Tanaka
发明人： Kazuomi Sakatani , Soh Hirota , Masahiro Kouzaki , Mitsuru Obara , Masaki Tanaka
IPC分类号： G03G15/00
CPC分类号： G03G15/0126
摘要： In an image forming apparatus of the present invention, a developing unit for magenta contains magenta-type toner for pseudo full-color image forming whose chromaticity point is shifted closer to yellow hue on a chromaticity diagram, in comparison with genuine-magenta toner for full-color image forming, and likewise, a developing unit for cyan contains cyan-type toner for the pseudo full-color image forming whose chromaticity point is shifted closer to yellow hue on the chromaticity diagram, in comparison with genuine-cyan toner for the full-color image forming.
摘要翻译： 在本发明的图像形成装置中，用于洋红的显影单元包括用于伪全色图像形成的品红色调色剂，其色度点在色度图上更接近黄色色调，与正品品红色调色剂相比较 相似地，用于青色的显影单元包含用于伪全色图像形成的青色调色剂，其色度点在色度图上更接近于黄色色调，与用于全色的真正青色调色剂相比 彩色图像形成。
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公开(公告)号：US20060029403A1
公开(公告)日：2006-02-09
申请号：US10976773
申请日：2004-11-01
申请人： Soh Hirota , Masaki Tanaka , Masahiro Kouzaki , Kazuomi Sakatani , Mitsuru Obara
发明人： Soh Hirota , Masaki Tanaka , Masahiro Kouzaki , Kazuomi Sakatani , Mitsuru Obara
IPC分类号： G03G15/08
CPC分类号： G03G15/0853 , G03G15/0877 , G03G2215/0602 , G03G2215/0614
摘要： An electrophotographic image forming apparatus includes a developer reservoir for accommodating a single-component mixed developer including two types of toner having a generally identical hue and different reflection densities. A magnetic substance is added to one of the two types of toner. The apparatus also includes a detector for detecting a magnetic permeability of the developer in the developer reservoir and a unit for determining a mixture ratio of the two types of toner based on the magnetic permeability of the developer detected by the detector.
摘要翻译： 电子照相成像设备包括用于容纳单组分混合显影剂的显影剂储存器，其包括具有大致相同色调和不同反射浓度的两种类型的调色剂。 向这两种类型的调色剂之一加入磁性物质。 该装置还包括用于检测显影剂储存器中的显影剂的磁导率的检测器和用于基于由检测器检测到的显影剂的磁导率来确定两种类型的调色剂的混合比的单元。
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