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    • 1. 发明专利
    • Image processing apparatus and control method of the same
    • 图像处理装置及其控制方法
    • JP2014011723A
    • 2014-01-20
    • JP2012148458
    • 2012-07-02
    • Canon Incキヤノン株式会社
    • TAKIGAWA YOICHIHIRABAYASHI JUN
    • H04N1/409B41J2/44G06T3/40
    • PROBLEM TO BE SOLVED: To form more appropriate images by correcting image data according to a spot shape of a light source on an image carrier and a pattern of the image data in an image forming apparatus using an electrophotographic method.SOLUTION: An image processing apparatus is for an image forming apparatus forming images by exposing an image carrier by an exposure unit, and has generation means for generating control signals for controlling the exposure unit on the basis of input image data. The control signals are generated, for target pixels constituting the input image data, according to a pattern in an area including the target pixels and similarity to a shape of a light intensity distribution when the target pixels are exposed on the image carrier.
    • 要解决的问题:通过使用电子照相方法在图像形成装置中根据图像载体上的光源的斑点形状和图像数据的图案校正图像数据来形成更合适的图像。解决方案:图像处理装置 是用于通过曝光单元曝光图像载体来形成图像的图像形成装置,并且具有用于基于输入图像数据产生用于控制曝光单元的控制信号的发生装置。 对于构成输入图像数据的目标像素,根据包括目标像素的区域中的图案,并且当目标像素曝光在图像载体上时,与光强度分布的形状相似,生成控制信号。
    • 2. 发明专利
    • Image formation device and control method thereof
    • 图像形成装置及其控制方法
    • JP2013246208A
    • 2013-12-09
    • JP2012117754
    • 2012-05-23
    • Canon Incキヤノン株式会社
    • KUBO HIDEKITAKIGAWA YOICHI
    • G03G15/00
    • PROBLEM TO BE SOLVED: To consider a change of gradation reproduction characteristics in an image formation device to suitably suppress banding resulting from a module having periodicity according to gradation.SOLUTION: An image processing device for forming an image in an image formation device using a device periodically operating includes: first correction means of correcting gradation reproduction characteristics in the image formation device, with respect to input image data; acquisition means of acquiring a variation correction amount correcting the input image data according to gradation of the input image data so as to reducing periodic variation resulting from the device; and adjustment means of, when the gradation reproduction characteristics are changed, adjusting the variation correction amount.
    • 要解决的问题:考虑图像形成装置中的灰度再现特性的变化,以适当地抑制由具有根据灰度的周期性的模块产生的条带。解决方案:一种图像处理装置,用于在使用装置的图像形成装置中形成图像 周期性操作包括:相对于输入图像数据校正图像形成装置中的灰度再现特性的第一校正装置; 获取装置,用于根据输入图像数据的灰度获取校正输入图像数据的变化校正量,以减少由该装置产生的周期性变化; 以及当灰度再现特性改变时调整变化校正量的调节装置。
    • 3. 发明专利
    • Image processing apparatus and method for controlling the same
    • 图像处理装置及其控制方法
    • JP2012255834A
    • 2012-12-27
    • JP2011127515
    • 2011-06-07
    • Canon Incキヤノン株式会社
    • TAKIGAWA YOICHIKUBO HIDEKIIMAI AKIHITO
    • G03G15/00G03G15/01
    • PROBLEM TO BE SOLVED: To obtain a good image by performing appropriate correction processing according to gradation of an input image and suppressing banding.SOLUTION: An image processing apparatus for forming an image with a device periodically moved by an electrophotographic system comprises: control means for controlling image formation with the device; acquirement means for acquiring a phase for the device corresponding to a target pixel; a correction amount calculation means for calculating a correction amount for correcting variations in density caused by the device, according to an input value representing the target pixel and the phase; and correction means for correcting the input value representing the target pixel using the correction amount.
    • 要解决的问题:通过根据输入图像的灰度进行适当的校正处理并抑制条带来获得良好的图像。 解决方案:用于通过电子照相系统周期性移动的装置形成图像的图像处理装置包括:用于利用所述装置控制图像形成的控制装置; 获取装置,用于获取对应于目标像素的装置的相位; 校正量计算装置,用于根据表示目标像素和相位的输入值计算用于校正由装置引起的浓度变化的校正量; 以及校正装置,用于使用校正量校正表示目标像素的输入值。 版权所有(C)2013,JPO&INPIT
    • 4. 发明专利
    • Image forming apparatus, and control method thereof
    • 图像形成装置及其控制方法
    • JP2012125953A
    • 2012-07-05
    • JP2010277427
    • 2010-12-13
    • Canon Incキヤノン株式会社
    • TAKIGAWA YOICHI
    • B41J2/44B41J2/525G03G15/04G03G15/043H04N1/113
    • PROBLEM TO BE SOLVED: To reduce, by a simple structure, deterioration of image quality resulting from variation in emission intensity and scanning interval errors, which are caused in an electrophotographic process of a multibeam scanning system.SOLUTION: A chart recording control unit 15 retains chart image data for repeatedly forming, in a sub-scanning direction, a recording line for superimposing and recording main scanning lines of a plurality of colors and a blank line. The chart image data is formed on a recording medium while changing, for each color, a combination of writing laser light sources for which exposure is started first among a plurality of laser light sources in a laser array L, whereby a plurality of test charts are obtained. A chart evaluation unit 16 calculates an evaluation value which indicates the level of image quality deterioration for each of the plurality of test charts. A laser combination selection unit 17 selects a combination of writing laser light sources which corresponds to a test chart with the evaluation value being in an allowable range. An image formation control unit 11 in an image forming unit of each color performs image forming while controlling laser light sources so as to attain the selected combination of laser light sources.
    • 要解决的问题:通过简单的结构,减少由多光束扫描系统的电子照相处理引起的发光强度和扫描间隔误差的变化引起的图像质量的劣化。 图解记录控制单元15保留图形图像数据,用于在副扫描方向上重复地形成用于叠加和记录多种颜色和空白行的主扫描线的记录线。 图形图像数据形成在记录介质上,同时针对每种颜色,在激光阵列L中的多个激光源之间首先开始曝光的写入激光光源的组合,由此多个测试图是 获得。 图表评估单元16计算指示多个测试图中的每一个的图像质量劣化水平的评估值。 激光组合选择单元17选择与测试图对应的写入激光光源的组合,评估值在允许范围内。 每种颜色的图像形成单元中的图像形成控制单元11在控制激光源的同时执行图像形成,以便获得所选择的激光光源的组合。 版权所有(C)2012,JPO&INPIT
    • 6. 发明专利
    • 画像形成装置
    • 图像形成装置
    • JP2014210380A
    • 2014-11-13
    • JP2013087877
    • 2013-04-18
    • キヤノン株式会社Canon Inc
    • HORIUCHI IZURUTAKIGAWA YOICHIHIRABAYASHI JUN
    • B41J2/44G02B26/10G03G15/00
    • G03G15/043B41J2/471G02B26/127G03G15/04072
    • 【課題】主走査方向においてレーザ光の感光体に対する入射角度は露光位置によって異なるため、主走査方向において感光体上におけるレーザ光のスポット形状が異なることを抑制する画像形成装置を提供する。【解決手段】注目画素の周辺に位置する周辺画素が前記光ビームで露光されることによる前記注目画素位置の電位変化量を示す前記補正データを出力する出力手段と、前記補正データと前記注目画素の画素データとに基づいて前記注目画素の画素データを補正する補正手段と、前記注目画素を形成するために、前記補正手段によって補正された前記注目画素の画素データに基づいて前記光源を制御する制御手段と、を備え、主走査方向においてフィルタ係数を変更し、当該フィルタ係数によって画像データを補正する。【選択図】図4
    • 要解决的问题:提供一种图像形成装置,用于根据激光束相对于感光体的入射角的差异,根据曝光位置来抑制主扫描方向上的感光体表面上的激光束点形状的差异 原始扫描方向。图像形成装置包括:输出装置,用于输出表示由位于被光束曝光的聚焦像素附近的附近像素的焦点像素位置的电位变化值的校正数据; 校正装置,用于根据校正数据和焦点像素的像素数据校正焦点像素的校正数据; 以及控制装置,用于基于由校正装置校正的聚焦像素的像素数据来控制光源,以形成聚焦像素。 此外,滤波器系数在主扫描方向上改变,并且用滤波器系数校正图像数据。
    • 7. 发明专利
    • Image forming apparatus and method
    • 图像形成装置和方法
    • JP2012177779A
    • 2012-09-13
    • JP2011040214
    • 2011-02-25
    • Canon Incキヤノン株式会社
    • TAKIGAWA YOICHIKUBO HIDEKIOCHIAI TAKASHI
    • G03G15/01B41J2/44
    • PROBLEM TO BE SOLVED: To perform a highly accurate banding correction which suppresses the generation of color unevenness caused by correction errors.SOLUTION: An image forming apparatus comprises a plurality of image forming parts 100Y, 100M, 100C and 100K, a secondary transfer device 111, and an intermediate transfer belt cleaning device 113. A fixation device 112 is provided in the downstream side of the secondary transfer device 111. With respect to the respective image forming parts 100Y, 100M, 100C and 100K, respective color banding correction parts 130Y, 130M, 130C and 130K are provided corresponding thereto. The image forming apparatus is further provided with a correction error storage part 140, and an HT image storage part not shown in figures.
    • 要解决的问题:执行抑制由校正误差引起的颜色不均匀的产生的高精度条带校正。 解决方案:图像形成装置包括多个图像形成部100Y,100M,100C和100K,二次转印装置111和中间转印带清洁装置113.固定装置112设置在 二次转印装置111.对于各图像形成部100Y,100M,100C和100K,相应地提供相应的色带校正部分130Y,130M,130C和130K。 图像形成装置还设置有校正误差存储部分140和图中未示出的HT图像存储部分。 版权所有(C)2012,JPO&INPIT
    • 8. 发明专利
    • Image processing apparatus and method thereof
    • 图像处理装置及其方法
    • JP2012098623A
    • 2012-05-24
    • JP2010247839
    • 2010-11-04
    • Canon Incキヤノン株式会社
    • KUBO HIDEKIOCHIAI TAKASHITAKIGAWA YOICHI
    • G03G15/00B41J2/44G03G15/04G03G15/043
    • PROBLEM TO BE SOLVED: To reduce banding through control of density fluctuation caused by sparse or dense scanning lines.SOLUTION: A scanning line position calculation part 104 calculates an error in a vertical scanning direction of scanning line position of a current line on an image carrier. A scanning line position storage part 105, which includes a table which stores information showing an error in the respective scanning line positions of the current line on the image carrier and multiple previous lines thereon with respect to the current line, uses the calculated error to sequentially update the information that shows the error in the respective scanning line positions and is stored in the table. A scanning line interval calculation part 106 refers to the table to calculate an interval between the scanning line position of the current line on the image carrier and the scanning line position of a line thereon around the current line. A correction factor calculation part 107 calculates a correction factor of exposure amount based on the interval, and an exposure amount correction part 108 controls the exposure amount of the current line based on the correction factor. A predictive coefficient calculation part 109 refers to the table to set a coefficient that is used when the scanning line interval calculation part 106 calculates the interval.
    • 要解决的问题:通过控制由稀疏或致密的扫描线引起的密度波动来减少条带。 解决方案:扫描线位置计算部分104计算图像载体上的当前行的扫描线位置的垂直扫描方向上的误差。 扫描线位置存储部105包括存储表示图像载体上的当前行的各扫描线位置和相对于当前行的多个前一行的错误的信息的表,使用所计算的误差来顺序地 更新在各扫描线位置显示错误的信息,并存储在表中。 扫描线间隔计算部106参照该表来计算图像载体上的当前行的扫描线位置与当前行周围的线的扫描线位置之间的间隔。 校正因子计算部107基于间隔计算曝光量的校正因子,曝光量校正部108基于校正因子来控制当前行的曝光量。 预测系数计算部109参照表来设定扫描线间隔计算部106计算间隔时使用的系数。 版权所有(C)2012,JPO&INPIT
    • 9. 发明专利
    • Image forming apparatus and control method of the same
    • 图像形成装置及其控制方法
    • JP2012096470A
    • 2012-05-24
    • JP2010246744
    • 2010-11-02
    • Canon Incキヤノン株式会社
    • TAKIGAWA YOICHIKUBO HIDEKI
    • B41J2/44G03G15/00
    • PROBLEM TO BE SOLVED: To achieve banding correction with high accuracy by calculating a correction rate of an exposure amount on a scanning line of interest from positional information of the scanning line of interest and scanning lines before and after it.SOLUTION: In forming the scanning line of interest on a photoreceptor drum 401, a scanning line position detection part 104 acquires positional information of the scanning line of interest and positional information of an exposed scanning line in a sub-scanning direction, and holds the information in a scanning line position storage part 105. A scanning line interval calculation part 106 calculates a first scanning line interval between the scanning line of interest and a succeeding scanning line to be exposed sequentially, and a second scanning line interval between the scanning line of interest and the exposed scanning line from the positional information which is held. An exposure amount correction rate calculation part 107 calculates the correction rate of the exposure amount so that a predicted density calculated by using the first and second scanning line intervals on the scanning line of interest is made equal to a predicted density calculated by using a predetermined reference scanning line interval. The banding correction with high accuracy can be achieved by exposure scanning with the corrected exposure amount corrected with the correction rate in an exposure amount correction part 109 on the scanning line of interest.
    • 要解决的问题:通过从感兴趣的扫描线的位置信息和扫描线之前和之后的扫描线的位置信息计算感兴趣的扫描线上的曝光量的校正速率,以高精度实现条带校正。 解决方案:在感光鼓401上形成感兴趣的扫描线时,扫描线位置检测部104获取扫描线的位置信息和副扫描方向上的曝光扫描线的位置信息, 将信息保存在扫描线位置存储部105中。扫描行间隔计算部106计算要依次曝光的感兴趣的扫描线和后续扫描线之间的第一扫描线间隔和扫描线间隔计算部106之间的第二扫描线间隔。 感兴趣的行和从所保持的位置信息的曝光的扫描线。 曝光量校正率计算部107计算曝光量的校正率,使得通过使用感兴趣的扫描线上的第一和第二扫描线间隔计算的预测浓度等于通过使用预定参考计算的预测密度 扫描线间隔。 可以通过在感兴趣的扫描线上的曝光量校正部分109中用校正速率校正的校正曝光量的曝光扫描来实现高精度的条带校正。 版权所有(C)2012,JPO&INPIT