公开(公告)号：EP1804134A3

公开(公告)日：2014-02-26

申请号：EP06127246.4

申请日：2006-12-27

申请人： CANON KABUSHIKI KAISHA

发明人： Itagaki, Tomohisa ,  Sasanuma, Nobuatsu ,  Tomita, Masami ,  Saishoji, Toshio ,  Takayama, Satoshi ,  Hayashi, Miyoko

IPC分类号： G03G15/01

CPC分类号： G03G15/01 ,  G03G2215/0164

摘要： Color reproducibility needs to be evaluated in consideration of the influence of homogeneity in page image. Hence, a first chart is formed from an image of a uniform density of a region to be evaluated, and data associated with the spectral reflectances of plural points on the first chart are input. Based on the data obtained from the first chart, color differences between a predetermined point and other points on the first chart are calculated. When the calculated color differences fall within a permissible range of heterogeneity of colors in the region, a second chart is formed from an image corresponding to a color target, and data associated with the spectral reflectances of plural points on the second chart are input. Color differences are calculated from the data obtained from the second chart and data associated with the spectral reflectance of the color target.

公开(公告)号：EP2600202A3

公开(公告)日：2013-11-06

申请号：EP12194067.0

申请日：2012-11-23

申请人： CANON KABUSHIKI KAISHA

发明人： Itagaki, Tomohisa

IPC分类号： G03G15/00

CPC分类号： G03G15/2039 ,  G03G15/5062 ,  G03G2215/00772

摘要： An image forming apparatus (100) includes an image forming unit (120, 121, 122, 123) configured to form a measurement image on a recording paper (110), a fixing unit (150, 160) configured to fix the measurement image onto the recording paper by heating, a measurement unit (200) configured to measure the measurement image fixed on the recording paper downstream of the fixing unit in a conveyance direction of the recording paper, and a correction unit (325) configured to correct a measurement value output from the measurement unit such that an effect of temperature of the recording paper is decreased when the measurement unit measures the measurement image. The correction unit is configured not to correct the measurement value in a case where density of the measurement image is measured by the measurement unit, and the correction unit is configured to correct the measurement value in a case where color of the measurement image is measured by the measurement unit.

摘要翻译： 一种图像形成装置，包括：图像形成单元，用于在记录纸上形成测量图像;定影单元，用于将测量图像定影到所述图像形成单元上， 所述记录纸通过加热而被记录;测量单元（200），其被配置为测量在所述记录纸的传送方向上定影在所述定影单元下游的记录纸上的测量图像;以及校正单元（325），其被配置为校正测量值 从测量单元输出，使得当测量单元测量测量图像时记录纸的温度效应降低。 所述校正单元被配置为在通过所述测量单元测量所述测量图像的密度的情况下不校正所述测量值，并且所述校正单元被配置为在测量图像的颜色被测量的情况下校正所述测量值 测量单位。

公开(公告)号：EP2555059A2

公开(公告)日：2013-02-06

申请号：EP12178717.0

申请日：2012-07-31

申请人： Canon Kabushiki Kaisha

发明人： Shirafuji, Yasuhito ,  Itagaki, Tomohisa ,  Zaima, Nobuhiko ,  Ishihara, Takahiro

IPC分类号： G03G15/16

CPC分类号： G03G15/161 ,  G03G15/0131 ,  G03G15/5058 ,  G03G2215/00059

摘要： An image forming apparatus (100) configures a normal transfer potential in a yellow primary transfer unit (7Y), and configures a transfer potential (e.g. 0 volt) which does not cause any retransfer phenomenon of a yellow measurement image in image carriers (1M, 1C, 1K) located on the downstream side of the yellow primary transfer unit (7Y). When a color difference (ΔE) obtained from a reference density and a density of a measurement image on an intermediate transfer belt (6) becomes equal to or larger than a prescribed value (e.g. 3), the image forming apparatus (100) determines that multinary-color density adjustment is required.

摘要翻译： 图像形成装置（100）在黄色一次转印单元（7Y）中配置正常转印电位，并且构成在图像载体中不引起黄色测量图像的任何再次发生现象的转移电位（例如0伏） 1C，1K）位于黄色一次转印单元（7Y）的下游侧。 当从中间转印带（6）的参考密度和测量图像的浓度获得的色差（“E”）等于或大于规定值（例如3）时，图像形成装置（100）确定 需要进行多色调密度调整。

公开(公告)号：EP2535776A1

公开(公告)日：2012-12-19

申请号：EP12169941.7

申请日：2012-05-30

申请人： Canon Kabushiki Kaisha

发明人： Shirafuji, Yasuhito ,  Itagaki, Tomohisa ,  Zaima, Nobuhiko ,  Ishihara, Takahiro

IPC分类号： G03G15/043

CPC分类号： G03G15/5054 ,  G03G15/043 ,  G03G15/5025 ,  G03G15/5058 ,  G03G2215/00029

摘要： An image forming apparatus includes an image forming unit having an exposure unit and a developing unit; a detection unit configured to detect a thickness and an area ratio of a toner layer of a pattern image formed by the image forming unit; a storage unit configured to store data indicating permissible ranges for the thickness and the area ratio of the toner layer; and a correction unit configured to change, when the thickness or the area ratio of the toner layer detected by the detection unit falls outside the corresponding permissible range indicated by the data stored in the storage unit, a spot diameter of the laser beam so that the thickness and the area ratio of the toner layer respectively fall within the permissible ranges.

摘要翻译： 图像形成装置包括具有曝光单元和显影单元的图像形成单元; 检测单元，被配置为检测由图像形成单元形成的图案图像的调色剂层的厚度和面积比; 存储单元，被配置为存储指示所述调色剂层的厚度和面积比的允​​许范围的数据; 以及校正单元，被配置为当由检测单元检测到的调色剂层的厚度或面积比落在存储在存储单元中的数据所指示的相应容许范围之外时，改变激光束的光斑直径，使得 调色剂层的厚度和面积比分别落在容许范围内。

公开(公告)号：EP1227649A2

公开(公告)日：2002-07-31

申请号：EP01308972.7

申请日：2001-10-23

申请人： CANON KABUSHIKI KAISHA

发明人： Ikeda, Yuichi ,  Suzuki, Kazuo ,  Zaima, Nobuhiko ,  Sasanuma, Nobuatsu ,  Itagaki, Tomohisa

IPC分类号： H04N1/00

CPC分类号： H04N1/00867 ,  H04N1/0087 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32309 ,  H04N2201/0082 ,  H04N2201/3205 ,  H04N2201/327

摘要： This invention relates to a method of setting anti-forgery information addition level while taking an apparatus individual difference into consideration. The method is employed by a data processing system including: an image processing apparatus 100 for processing an image; and a maintenance apparatus 120, connected with the image processing apparatus through a network 110, for setting a processing function of the image processing apparatus 100. The maintenance apparatus 120 determines an anti-forgery information addition level depending on an individual difference of apparatuses, such as an exhaustion level of the image processing apparatus 100. The addition level determined by the maintenance apparatus 120 is transmitted to the image processing apparatus 100. The image processing apparatus 100 adds anti-forgery information to an inputted image at the addition level transmitted by the maintenance apparatus 120.

摘要翻译： 本发明涉及一种在考虑设备个体差异的同时设置防伪信息添加级别的方法。 该方法由数据处理系统采用，包括：图像处理装置100，用于处理图像; 以及通过网络110与图像处理装置连接的维护装置120，用于设定图像处理装置100的处理功能。维护装置120根据装置的个体差异来确定防伪信息添加级别，例如 作为图像处理装置100的耗尽级别。由维护装置120确定的相加等级被发送到图像处理装置100.图像处理装置100将加密级别的防伪信息添加到由 维护装置120.

公开(公告)号：EP1220525A2

公开(公告)日：2002-07-03

申请号：EP01130969.7

申请日：2001-12-28

申请人： CANON KABUSHIKI KAISHA

发明人： Sasanuma, Nobuatsu ,  Kanbayashi, Makoto ,  Suzuki, Kazuo ,  Ikeda, Yuichi ,  Nakagawa, Kenichi ,  Itagaki, Tomohisa ,  Zaima, Nobuhiko

IPC分类号： H04N1/00 ,  H04N1/29

CPC分类号： H04N1/00015 ,  H04N1/00002 ,  H04N1/0005 ,  H04N1/00063 ,  H04N1/295 ,  H04N1/46

摘要： Image data supplied to an image forming apparatus are converted into image data linearly correlated with the image density, and the image ratio is calculated by dividing the number of pixels in which the toner is deposited at the image formation of thus converted image data on a print medium, with a value obtained by multiplying the total pixel number corresponding to the size of the print medium with the number of gradation levels per pixel. Then the toner amount consumed in the image formation based on the entered image data is determined by multiplying the image ratio, the size of the print medium to be used and the toner amount consumed per unit area in a solid image formation.

摘要翻译： 提供给图像形成装置的图像数据被转换为与图像浓度成线性相关的图像数据，并且通过将在这样转换的图像数据的图像形成中的沉积色调剂的像素数除以打印数据来计算图像比率 通过将与打印介质的尺寸相对应的总像素数乘以每像素的灰度级数获得的值。 然后，根据输入的图像数据，在图像形成中消耗的调色剂量通过将图像比率，所使用的打印介质的尺寸和在固体图像形成中每单位面积消耗的调色剂量相乘来确定。