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公开(公告)号：US10078290B2
公开(公告)日：2018-09-18
申请号：US15872052
申请日：2018-01-16
发明人： Hiroshi Tomii
IPC分类号： G03G15/043 , G06K15/02 , H04N1/00 , H04N1/405
CPC分类号： G03G15/043 , G03G15/5058 , G03G2215/00042 , G06K15/027 , H04N1/00761 , H04N1/4052 , H04N1/6036
摘要： An image forming apparatus that enhances measurement accuracy of a pattern image and improves quality of a printed image. Light emitted from a light emission unit based on a first measurement condition is reflected from an image bearing member, and first information is generated based on a measurement result of the image bearing member. Second information is determined based on the first measurement condition, the first information, and a second measurement condition. Light is emitted based on the first measurement condition when a first measurement image is measured, and an image forming condition is generated based on a measurement result of the first measurement image and the first information. Light is emitted based on the second measurement condition when a second measurement image is measured, and the image forming condition is generated based on a measurement result of the second measurement image and the second information.
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2.发明申请公开(公告)号：US20180097969A1
公开(公告)日：2018-04-05
申请号：US15686288
申请日：2017-08-25
发明人： Yasunari YOSHIDA
CPC分类号： H04N1/4052 , B41J2/04508 , B41J2/04535 , B41J2/04586 , B41J2/2132 , G06K15/107 , G06K15/1881 , H04N1/00411 , H04N1/40087 , H04N1/405 , H04N1/4053 , H04N1/4057 , H04N1/52
摘要： In an error diffusion process, a control device determines a dot value of a target pixel by using a gradation value of the target pixel, and an error value. The control device determines distribution error value by comparing a gradation dependent value with a first evaluated density value indicating a density of a first dot. The control device determines the distribution error value by using the first evaluated density value when the dot value of the target pixel indicates formation of the first dot and when the gradation dependent value is smaller than or equal to the first evaluated density value. The control device determines the distribution error value by using a modified evaluated density value greater than the first evaluated density value when the dot value indicates formation of the first dot and when the gradation dependent value is greater than the first evaluated density value.
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公开(公告)号：US09924070B2
公开(公告)日：2018-03-20
申请号：US15210380
申请日：2016-07-14
发明人： Yasutomo Furuta
IPC分类号： H04N1/405 , H04N1/113 , H04N1/06 , G03G15/043 , H04N1/50
CPC分类号： H04N1/4052 , G03G15/043 , H04N1/06 , H04N1/113 , H04N1/506 , H04N2201/0094
摘要： A correction method for an image forming apparatus including: a light source including light emitting points, a photosensitive member configured to rotate in a first direction, and a deflecting unit configured to deflect light beam emitted from the light source in a second direction orthogonal to the first direction to form scanning lines, the correction method including a correction step of correcting sparseness and denseness of density in the first direction caused by deviation of the scanning lines by moving a predetermined pixel in the first direction in accordance with the deviation, and causing a pixel value of the predetermined pixel to be output in accordance with movement of the predetermined pixel, wherein the correction step corrects the sparseness and denseness of the density based on the deviation of the scanning lines and the pixel value of the pixel, which are adjusted in accordance with an image forming condition.
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公开(公告)号：US09900466B2
公开(公告)日：2018-02-20
申请号：US15437163
申请日：2017-02-20
发明人： Daisuke Fujiwara , Yukio Yoshikawa
CPC分类号： H04N1/4053 , G06K15/021 , G06K15/028 , G06K15/1836 , G06K15/1847 , G06K2215/0042 , G06K2215/0097 , H04N1/4052 , H04N2201/0082
摘要： An image processing apparatus includes an image processor that performs error diffusion processing by applying an error diffusion matrix to multi-valued image data having pixels two-dimensionally arranged, so as to convert the multi-valued image data into binary image data. The binarization unit applies an error diffusion matrix in which the diffusion coefficient of a pixel diagonal to a focused-on pixel is greater than those of other pixels.
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公开(公告)号：US09894245B2
公开(公告)日：2018-02-13
申请号：US15408249
申请日：2017-01-17
申请人： FUJIFILM Corporation
发明人： Takashi Wakui
CPC分类号： H04N1/4051 , G06K15/1843 , G06K15/1873 , G06K15/1876 , G06K15/1881 , G06K2215/0057 , G06K2215/0094 , H04N1/2369 , H04N1/3935 , H04N1/40068 , H04N1/4052
摘要： An image processing device which generates a halftone image includes: an image size adjustment unit which adjusts a size of the input image; and a halftone processing unit which performs halftone processing on the input image size-adjusted to generate a halftone image, wherein: the image size adjustment unit adjusts the input image to a same size in two or more printing modes among the plurality of printing modes, and the input image of the same size is subjected to the halftone processing; the unit limits arrangement of dots constituting the halftone image to dot arrangeable places of a selected printing mode among the plurality of printing modes, and performs the halftone processing based on an error diffusion method using an error diffusion coefficient matrix according to the selected printing mode; and the functions performed by the image size adjustment unit and the halftone processing unit are achieved using a computer.
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6.发明申请公开(公告)号：US20170244860A1
公开(公告)日：2017-08-24
申请号：US15435870
申请日：2017-02-17
发明人： Eishin YOSHIKAWA
CPC分类号： H04N1/4052 , G06K15/102 , G06K15/1836
摘要： An image processing method in which image data including a grayscale value in each pixel is converted into print data including formation necessity of dots, includes extracting a region in which a total value of the grayscale value of the pixel included in each predetermined division in which the image data is divided does not become a predetermined threshold value as a non-processing region; and extracting a region surrounded with the non-processing region as a processing region.
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公开(公告)号：US09729757B2
公开(公告)日：2017-08-08
申请号：US15244962
申请日：2016-08-23
发明人： Toshiaki Mutsuo , Seiki Satomi
CPC分类号： H04N1/4052 , H04N1/4055 , H04N1/52 , H04N1/60
摘要： A filter processing unit performs a bandpass filter process for a difference between an output pixel value and an input pixel value of an adjacent pixel to a target pixel. An error diffusion unit performs an error diffusion process of a quantization error for output of the filter processing unit. A quantizer performs quantization for a value obtained by the error diffusion process and thereby determines the output pixel value of the target pixel. The bandpass filter process is performed with characteristics different from each other (a) in respective ones of a primary scanning direction and a secondary scanning direction and (b) for respective ones of the component colors of the image. Furthermore, a filter coefficient of the bandpass filter process independently for each component color of an image is corrected for banding reduction with a correction coefficient corresponding to an angle from the primary scanning direction.
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公开(公告)号：US20170195520A1
公开(公告)日：2017-07-06
申请号：US15394331
申请日：2016-12-29
发明人： Jibing PENG , Yangxiao MA
IPC分类号： H04N1/405
CPC分类号： H04N1/4052 , H04N1/4053 , H04N2201/0081
摘要： In various embodiments, an image processing method using self-adaptive error diffusion algorithm, a related apparatus and device are provided. In some embodiments, the method comprises: determining a neighboring region in an original image for error diffusion process, the neighboring region including a center point and its adjacent points; based on pixel values of the center point and the adjacent points, calculating an error diffusion process weight value for each adjacent point corresponding to an error diffusion process from the center point towards each adjacent point; after binarizing the pixel value of the center point, calculating an error value according to the binarized pixel value of the center point; adding a product of the error diffusion process weight value for each adjacent point and the error value to the pixel value of each adjacent point respectively to obtain an error-diffusion-processed pixel value for each adjacent point in the neighboring region.
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公开(公告)号：US20170019563A1
公开(公告)日：2017-01-19
申请号：US15210394
申请日：2016-07-14
发明人： Ryuichi Araki
CPC分类号： H04N1/4052 , G03G15/04 , G03G15/043 , H04N1/047 , H04N1/06 , H04N1/113 , H04N1/506 , H04N2201/0094
摘要： An image forming apparatus includes: a photosensitive member rotating in a first direction; a light scanning device, when the photosensitive member rotates at a slower speed, irradiate the photosensitive member with light beam through use of part of scanning lines corresponding to the slower speed; a storage unit in which information on positional deviation of the scanning lines in the first direction is stored; and a correction portion calculating a correction value for correcting positional deviation amounts of a predetermined scanning line and a scanning line group, which is included within a predetermined range in an advance direction and a return direction in the first direction from the predetermined scanning line, with extracting information corresponding to the part of the scanning lines from the stored information when the photosensitive member rotates at the slower speed, and correcting positional deviation of the predetermined scanning line based on the calculated correction value.
摘要翻译： 一种图像形成装置包括：沿第一方向旋转的感光构件; 光扫描装置，当感光构件以较慢的速度旋转时，通过使用对应于较慢速度的扫描线的一部分来照射感光构件的光束; 存储单元，其中存储关于沿第一方向的扫描线的位置偏差的信息; 以及校正部分，计算用于校正预定扫描线和扫描线组的位置偏移量的校正值，该预定扫描线和扫描线组包括在从预定扫描线沿第一方向的前进方向和返回方向上的预定范围内的预定范围内， 当感光构件以较慢的速度旋转时，从存储的信息中提取与扫描线的一部分相对应的信息，并且基于计算的校正值来校正预定扫描线的位置偏差。
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10.发明授权Image processing apparatus, method, and storage medium that perform quantizing processing of image data for at least N colors 有权执行至少N种颜色的图像数据的量化处理的图像处理装置，方法和存储介质公开(公告)号：US09384431B2
公开(公告)日：2016-07-05
申请号：US14244120
申请日：2014-04-03
发明人： Hideki Takemura
CPC分类号： G06K15/1881 , H04N1/4052
摘要： An apparatus includes an image processing circuit to perform quantizing processing of image data, which has a plurality of rasters, each of which is formed with a plurality of pixels, by an error diffusion method, to generate print data. The image processing circuit is capable of performing quantizing processing of image data for N colors, and performs the quantizing processing multiple times in image processing of image data for colors more than N colors. In a case when the image processing circuit performs image processing for image data for colors more than the N colors, the image processing circuit repeatedly performs at least first image processing for performing image processing of image data of a first color group and second image processing for performing image processing of image data of a second color group for each band.
摘要翻译： 一种装置包括：图像处理电路，通过误差扩散方法对具有多个像素的多个光栅执行图像数据的量化处理，以产生打印数据。 图像处理电路能够对N种颜色的图像数据进行量化处理，并且对于多于N种颜色的图像数据的图像数据的图像处理多次执行量化处理。 在图像处理电路对颜色多于N色的图像数据进行图像处理的情况下，图像处理电路重复执行用于对第一颜色组和第二图像处理的图像数据进行图像处理的至少第一图像处理 对每个频带执行第二颜色组的图像数据的图像处理。
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