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公开(公告)号：US5001767A
公开(公告)日：1991-03-19
申请号：US277605
申请日：1988-11-29
申请人： Hitoshi Yoneda , Hironobu Machida , Hiroki Kanno , Koji Izawa
发明人： Hitoshi Yoneda , Hironobu Machida , Hiroki Kanno , Koji Izawa
IPC分类号： G06T5/00
CPC分类号： G06T5/001 , G06K9/00456 , G06T2207/30176
摘要： An image processing device capable of processing images containing poorly contrasted letters and/or bold letters in addition to well contrasted letters and pictures such that both resolutions of letters and tones of pictures can be preserved. The device may includes a circuit to distinguish two level images from non two level images according to image concentration related quantity, and a circuit to distinguish picture images out of non two level images according to another image concentration related quantity. The device may include a circuit to distinguish letters from pictures according to the maximum and the minimum values of the image concentration related quantity. The device may includes a circuit to distinguish letters from pictures according to the maximum and the minimum values of changes in the image concentration related quantity. The device may include a circuit to distinguish letters from pictures according to the square sum average of differences in the image concentration related quantity between neighboring picture elements.
摘要翻译： 一种图像处理装置，其能够处理除对比较好的字母和图片之外的差的对比字母和/或粗体字的图像，使得可以保留图像的字母和色调的两个分辨率。 该装置可以包括根据图像浓度相关量来区分两级图像与非二级图像的电路，以及根据另一图像浓度相关量从非二级图像区分图像图像的电路。 该装置可以包括根据图像浓度相关量的最大值和最小值来区分字母与图像的电路。 该装置可以包括根据图像浓度相关量的变化的最大值和最小值来区分字母与图像的电路。 该装置可以包括根据相邻图像元素之间的图像浓度相关量的差的平方和平均值来区分字母与图像的电路。
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2.发明授权Image processing apparatus for variably magnifying image and controlling image density 失效用于可变放大图像和控制图像浓度的图像处理装置
公开(公告)号：US5280546A
公开(公告)日：1994-01-18
申请号：US800424
申请日：1991-11-29
申请人： Hironobu Machida , Hiroki Kanno , Hitoshi Yoneda
发明人： Hironobu Machida , Hiroki Kanno , Hitoshi Yoneda
CPC分类号： G06T3/4007 , G06T3/403
摘要： An image forming apparatus capable of magnifying a target image to any desired magnification, includes functions for detecting the maximum and minimum densities from limited image information, including a data piece representing a picture element of the target image, functions for determining from the difference between the maximum and minimum densities detected by the detection means, whether the picture element is in a photographic region or a character region, functions for determining a picture element density appropriate for magnifying the target image from the density of the target picture element and that of a picture element close to the target picture element, and functions for outputting the picture element density determined by the density-determining means, in accordance with whether the target picture element is in a photographic region or a character region.
摘要翻译： 一种能够将目标图像放大到任何期望倍率的图像形成装置包括用于从包括表示目标图像的图像元素的数据片的有限图像信息中检测最大和最小密度的功能，用于根据 由检测装置检测的最大和最小密度，无论图像元素是在照相区域还是字符区域中，用于确定适合于从目标像素的浓度和图像的浓度放大目标图像的像素密度 靠近目标像素的元件，以及用于输出由浓度确定装置确定的图像元素浓度的功能，根据目标图像是否在照相区域或字符区域中。
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公开(公告)号：US4998122A
公开(公告)日：1991-03-05
申请号：US407153
申请日：1989-09-14
申请人： Hiroki Kanno , Hitoshi Yoneda , Hironobu Machida
发明人： Hiroki Kanno , Hitoshi Yoneda , Hironobu Machida
CPC分类号： G06K9/38 , H04N1/40062 , G06K2209/01
摘要： A feature-analyzing section determines whether a given picture element included in image information supplied from a line buffer represents a character portion or a photograph portion. In accordance with the determination made by the feature-analyzing section, a threshold value selection section selects either a threshold value calculated by a first threshold value calculation section, and to be used in relation to charcter portion, or a threshold value calculated by a second threshold value calculation section, and to be used in relation to photograph portion. By using the threshold value selected by the threshold value selection section, a binary-encoding section binary-encodes image information which is supplied thereto through a delay circuit. On the basis of the determination made by the feature-analyzing section, a determination section determines whether or not the given picture element represents a bold character portion. If the determination section determines that the given picture element represents a bold character portion, a selection section then selects a predetermined value supplied from a value generation section, in place of an output of the binary-encoding section.
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公开(公告)号：US5109436A
公开(公告)日：1992-04-28
申请号：US486764
申请日：1990-03-01
申请人： Hironobu Machida , Hitoshi Yoneda , Hiroki Kanno
发明人： Hironobu Machida , Hitoshi Yoneda , Hiroki Kanno
CPC分类号： H04N1/40062
摘要： An extractor extracts, from image data to be binarized, a feature amount of a target pixel including at least a maximum density difference among pixels in a local region including the target pixel. A predictor predicts an image type of the target pixel in accordance with a minimum density value among the pixels in the local region. A selector selects one of the feature amount of the target pixel from the extractor and a feature amount obtained by adding the feature amount of the target pixel to feature data of neighboring pixels in accordance with the image type predicted by the predictor. A discriminator discriminates the image type of the target pixel in accordance with the feature amount selected by the selector. A weighting section weights the discrimination result from the discriminator with respect to the neighboring pixels of a predetermined range preceding the target pixel in accordance with distances from the target pixel to the neighboring pixels so as to generate feature data of the neighboring pixels selectively used by the selector. A determinator adaptively determines a threshold value for binarizing the image data in accordance with the discrimination result. A binarizing section binarizes the image data in units of target pixels by using the threshold value determined by the determinator.
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公开(公告)号：US5307426A
公开(公告)日：1994-04-26
申请号：US64791
申请日：1993-05-24
申请人： Hiroki Kanno , Hitoshi Yoneda
发明人： Hiroki Kanno , Hitoshi Yoneda
CPC分类号： H04N1/4053
摘要： This invention utilizes the fact that a maximum density difference of pixels in a window within a predetermined range including a pixel of interest is large for a character region, and is small for a photograph region. A maximum density difference of an image within the predetermined region is calculated. A quantization error of pixels around the pixel of interest is calculated, and a correction amount is then calculated by proportionally distributing the quantization error in accordance with a feature amount calculated by a feature amount calculator. The correction amount is added to an image signal of the pixel of interest to form a compensation image signal, and the compensation image signal is quantized.
摘要翻译： 本发明利用这样的事实：对于字符区域，包括感兴趣像素的预定范围内的窗口中的像素的最大浓度差异大，对于照片区域而言较小。 计算预定区域内的图像的最大浓度差。 计算感兴趣像素周围的像素的量化误差，然后根据由特征量计算器计算的特征量按比例分配量化误差来计算校正量。 校正量被添加到感兴趣像素的图像信号以形成补偿图像信号，并且补偿图像信号被量化。
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公开(公告)号：US5077812A
公开(公告)日：1991-12-31
申请号：US572403
申请日：1990-08-27
申请人： Hiroki Kanno , Hitoshi Yoneda
发明人： Hiroki Kanno , Hitoshi Yoneda
IPC分类号： H04N1/405
CPC分类号： H04N1/4052
摘要： An image processing apparatus including an input circuit for receiving image data, a binarizing unit for binarizing a subject pixel of the image data supplied from the input circuit, an error detector for detecting an error between a binarized image data obtained by the binarizing unit and the image data supplied from the input circuit, an error diffusing circuit for diffusing the error on other image data associated with other pixels around the subject pixel, a compensating unit for compensating the image data of the subject pixel by using a compensation data which is caused by a previous error diffusion of the error diffusing circuit, a circuit for detecting an image density of the image data for a prescribed image area surrounding the subject pixel and a controller for controlling the compensating unit in response to the image density detected by the image density detecting circuit.
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7.发明授权Image processing apparatus and image processing method for reproducing a color image from color signals having different phases 失效用于从具有不同相位的彩色信号再现彩色图像的图像处理装置和图像处理方法
公开(公告)号：US5299034A
公开(公告)日：1994-03-29
申请号：US826807
申请日：1992-01-28
申请人： Hiroki Kanno , Hitoshi Yoneda
发明人： Hiroki Kanno , Hitoshi Yoneda
CPC分类号： H04N1/52
摘要： An image processing apparatus having a first conversion section for converting image data of a target pixel in a multi-color image as an object to be processed into first color data corresponding to colors of the image data, a second conversion section for converting the first color data converted by the first conversion section into binary data, a first calculation section for calculating second color data having the same colors as those of the image data on the basis of a plurality of the binary data converted by the second conversion section, a second calculation section for calculating color errors between the image data and the second color data calculated by the first calculation section, a third calculation section for calculating weighting errors by multiplying the color errors calculated by the second calculation section with predetermined weighting coefficients, a storage section for storing the weighting errors calculated by the third calculation section, and a correction section for correcting the image data of the target pixel according to the weighting errors stored in the storage section.
摘要翻译： 一种图像处理装置，具有第一转换部分，用于将作为待处理对象的多色图像中的目标像素的图像数据转换为与图像数据的颜色相对应的第一颜色数据;第二转换部分，用于将第一颜色 由第一转换部分转换成二进制数据的数据;第一计算部分，用于基于由第二转换部分转换的多个二进制数据计算具有与图像数据相同颜色的第二颜色数据;第二计算部分， 用于计算由第一计算部分计算的图像数据和第二颜色数据之间的颜色误差的部分，第三计算部分，用于通过将由第二计算部分计算的颜色误差乘以预定加权系数来计算加权误差;存储部分，用于存储 由第三计算部分计算的加权误差和校正次数 用于根据存储在存储部分中的加权误差校正目标像素的图像数据。
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公开(公告)号：US5260810A
公开(公告)日：1993-11-09
申请号：US785788
申请日：1991-10-31
申请人： Hiroki Kanno , Hitoshi Yoneda
发明人： Hiroki Kanno , Hitoshi Yoneda
CPC分类号： H04N1/4053
摘要： This invention utilizes the fact that "a maximum density difference in a window within a predetermined range including a pixel of interest is large for a character region, and is small for a photograph region." A maximum density difference of an image within a predetermined range is calculated as a feature amount. A quantization error of pixels around a pixel of interest is calculated, and then, a correction amount is calculated by proportionally distributing the quantization error in accordance with the feature amount calculated by a feature amount calculator. The correction amount is added to an image signal of the pixel of interest to form a compensation image signal, and the compensation image signal is quantized.
摘要翻译： 本发明利用这样一个事实：“对于字符区域，包括感兴趣像素的预定范围内的窗口中的最大浓度差异大，照片区域小”。 将预定范围内的图像的最大浓度差计算为特征量。 计算感兴趣像素周围的像素的量化误差，然后根据由特征量计算器计算的特征量按比例分配量化误差来计算校正量。 校正量被添加到感兴趣像素的图像信号以形成补偿图像信号，并且补偿图像信号被量化。
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公开(公告)号：US07742199B2
公开(公告)日：2010-06-22
申请号：US10958467
申请日：2004-10-06
申请人： Hiroki Kanno
发明人： Hiroki Kanno
IPC分类号： H04N1/04
CPC分类号： H04N1/3877 , H04N1/41 , H04N19/423
摘要： A system and method for reproducing original documents includes scanning an original document to generate image data corresponding to the scanned original document, dividing the image data into a plurality of image data blocks, and compressing the plurality of image data blocks into respective compressed image data blocks, such that data of each compressed image data block is independent of data of each other compressed image data block. Each compressed image data block is stored in a first memory with a respective predetermined beginning address. The first compressed image data block, having a first predetermined beginning address, is accessed from the first memory and decompressed into a first decompressed image data block. At least one image processing function is performed on the decompressed first image data block.
摘要翻译： 用于再现原始文档的系统和方法包括扫描原始文档以生成与扫描的原始文档相对应的图像数据，将图像数据划分为多个图像数据块，并将多个图像数据块压缩成各自的压缩图像数据块 使得每个压缩图像数据块的数据独立于彼此的压缩图像数据块的数据。 每个压缩图像数据块被存储在具有相应的预定起始地址的第一存储器中。 具有第一预定起始地址的第一压缩图像数据块从第一存储器被访问并被解压缩成第一解压缩图像数据块。 对解压缩的第一图像数据块执行至少一个图像处理功能。
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10.发明授权公开(公告)号：US07301681B2
公开(公告)日：2007-11-27
申请号：US10382099
申请日：2003-03-06
申请人： Sunao Tabata , Hiroki Kanno
发明人： Sunao Tabata , Hiroki Kanno
CPC分类号： H04N1/00843 , H04N1/00002 , H04N1/00005 , H04N1/00045 , H04N1/00071 , H04N1/00848 , H04N1/00875 , H04N1/393 , H04N1/486
摘要： An image forming apparatus includes a four line CCD which produces RGB data and K data that are read out selectably, and a selector which selects whether to output the RGB data that is provided from the four line CCD. The image forming apparatus also includes a storage part which stores a plurality of patterns, and a judgment part that produces a judgment signal based on a comparison of the RGB data and the plurality of patterns stored in the storage part.
摘要翻译： 图像形成装置包括产生可选择地读出的RGB数据和K数据的四行CCD，以及选择是否输出从四行CCD提供的RGB数据的选择器。 图像形成装置还包括存储多个图案的存储部分和基于存储在存储部分中的RGB数据和多个图案的比较来产生判断信号的判断部分。
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