公开(公告)号：US20140092442A1

公开(公告)日：2014-04-03

申请号：US14099286

申请日：2013-12-06

申请人： CANON KABUSHIKI KAISHA

发明人： Maho Ooyanagi

IPC分类号： G06K15/02

CPC分类号： G06K15/1881 ,  H04N1/4105

摘要： Conventionally in a case of storing image data in an HDD, JPEG compression is executed to the image data for reducing the data size thereof and then the image data is stored. However, there are some cases where when the JPEG compression is executed to the image data including the copy-forgery-inhibited pattern and the like, degradation in image quality occurs. In regard to the image data including the copy-forgery-inhibited pattern and the like, the halftone processing is executed by the halftone processing unit without irreversible compression. Therefore, the image data can be stored in the HDD and like in a state of being small in a data size and with the image degradation restricted.

摘要翻译： 通常在将图像数据存储在HDD中的情况下，对图像数据执行JPEG压缩以减小其数据大小，然后存储图像数据。 然而，在某些情况下，当对包括禁止复制伪造的图案等的图像数据执行JPEG压缩时，出现图像质量的劣化。 关于包含禁止复制伪造图案的图像数据等，通过半色调处理单元执行半色调处理，而不进行不可逆压缩。 因此，图像数据可以存储在HDD中并且像数据尺寸小并且图像劣化受到限制的状态一样。

公开(公告)号：US08442336B2

公开(公告)日：2013-05-14

申请号：US12567877

申请日：2009-09-28

申请人： Daisuke Genda ,  Hideki Morita

发明人： Daisuke Genda ,  Hideki Morita

IPC分类号： G06K9/36 ,  G06K9/46

CPC分类号： H04N1/41 ,  H04N1/40062 ,  H04N1/4105 ,  H04N19/12 ,  H04N19/126 ,  H04N19/136 ,  H04N19/176 ,  H04N19/182 ,  H04N19/46 ,  H04N19/59

摘要： Disclosed is an image processing apparatus comprising an image compression conversion unit to quantize an image having attribute data for each pixel, wherein when a region has the attribute data of a photographic image, the image compression conversion unit quantizes the region by a BTC method, wherein when a region has the attribute data of other than the photographic image, and the region is a halftone region, the image compression conversion unit quantizes the region by the BTC method, and wherein when a region has the attribute data of other than the photographic image, and the region is a high resolution region, the image compression conversion unit generates a density pattern for the region to quantize the region according to the generated density pattern.

摘要翻译： 公开了一种图像处理装置，包括图像压缩转换单元，用于量化具有每个像素的属性数据的图像，其中当区域具有摄影图像的属性数据时，图像压缩转换单元通过BTC方法量化该区域，其中 当区域具有除了摄影图像之外的属性数据，并且该区域是半色调区域时，图像压缩转换单元通过BTC方法量化该区域，并且其中当区域具有不同于摄影图像的属性数据时 ，并且该区域是高分辨率区域，图像压缩转换单元根据生成的浓度模式生成用于对区域进行量化的区域的浓度图案。

公开(公告)号：US08437046B2

公开(公告)日：2013-05-07

申请号：US12555294

申请日：2009-09-08

申请人： Masahito Yamazaki

发明人： Masahito Yamazaki

IPC分类号： G06K15/00 ,  G06K9/46 ,  G03G13/04 ,  G09G3/28

CPC分类号： H04N1/4105 ,  H04N1/405 ,  H04N1/407

摘要： This presents an image processing apparatus and an image processing method which print and output image data subjected to halftone processing with an appropriate density characteristic. The image processing apparatus generates a halftone image from a multi-value image using a threshold value arrangement, and generates a difference image between the generated halftone image and a second halftone image having the density characteristic different from that of the generated halftone image. The image processing apparatus stores the generated halftone image and the generated difference image. The image processing apparatus determines the density characteristic for printing the second halftone image, when determining to carry out printing with the density characteristic different from that of the stored halftone image, generates a halftone image by combining the stored difference image according to the determined density characteristic and the stored halftone image, and outputs the combined halftone image for printing.

摘要翻译： 这提出了以适当的密度特性打印和输出经过半色调处理的图像数据的图像处理装置和图像处理方法。 图像处理装置使用阈值排列从多值图像生成半色调图像，并且生成所生成的半色调图像和具有与产生的半色调图像的浓度特性不同的浓度特征的第二半色调图像之间的差分图像。 图像处理装置存储所生成的半色调图像和生成的差分图像。 图像处理装置确定用于打印第二半色调图像的浓度特性，当确定以与所存储的半色调图像不同的浓度特性进行打印时，通过根据所确定的浓度特性组合存储的差分图像来产生半色调图像 和存储的半色调图像，并输出用于打印的组合的半色调图像。

公开(公告)号：US08244047B2

公开(公告)日：2012-08-14

申请号：US12588363

申请日：2009-10-13

申请人： Koichiro Hirao

发明人： Koichiro Hirao

IPC分类号： G06K9/36 ,  G06K9/46

CPC分类号： G06T9/005 ,  G06T9/00 ,  H04N1/4105 ,  H04N19/13 ,  H04N19/136 ,  H04N19/167 ,  H04N19/17 ,  H04N19/182 ,  H04N19/27 ,  H04N19/85

摘要： An image compression unit of the invention includes a preprocessing unit that performs preprocessing for converting a first bit string representing intensity of pixels of which image data is composed into a second bit string, a number of digits of which is smaller than a number of digits of the first bit string, based on a predetermined region included in the image data and a first attribute information for identifying an attribute of the predetermined region, with the preprocessing being associated with the predetermined region of the image data and a bit string conversion unit which converts the second bit string into a third bit string based on distribution of frequency of appearance of the intensity in the second bit string and the first attribute information such that, for the pixel having higher frequency of appearance, the number of bit planes on which data of the pixel appear is less.

摘要翻译： 本发明的图像压缩单元包括预处理单元，该预处理单元执行预处理，用于将表示图像数据组成的像素的强度的第一位串转换成第二位串，其数字数小于 基于包括在图像数据中的预定区域的第一位串和用于识别预定区域的属性的第一属性信息，其中预处理与图像数据的预定区域相关联，以及位串转换单元，其转换 基于第二位串中的强度出现频率的分布和第一属性信息，将第二位串转换为第三位串，使得对于具有较高出现频率的像素，位数的数量为 像素出现较少。

公开(公告)号：US08233731B2

公开(公告)日：2012-07-31

申请号：US12170875

申请日：2008-07-10

申请人： Sung-bum Park ,  Woo-sung Shim ,  Young-ho Moon ,  Dai-woong Choi ,  Jong-bum Choi

发明人： Sung-bum Park ,  Woo-sung Shim ,  Young-ho Moon ,  Dai-woong Choi ,  Jong-bum Choi

IPC分类号： H06K9/46

CPC分类号： H04N1/4105

摘要： A method to encode and decode a halftone image such that the halftone image is efficiently compressed and decoded by using pattern characteristics of the halftone image includes determining different template shapes according to characteristics of the halftone image, compressing the halftone image based on determined template shape information, compressing the template shape information, and generating the compressed halftone image and the compressed template shape information as a bitstream.

摘要翻译： 一种对半色调图像进行编码和解码的方法，使得通过使用半色调图像的图案特征有效地压缩和解码半色调图像，包括根据半色调图像的特性来确定不同的模板形状，基于确定的模板形状信息来压缩半色调图像 压缩模板形状信息，以及生成压缩半色调图像和压缩模板形状信息作为比特流。

公开(公告)号：US20110032574A1

公开(公告)日：2011-02-10

申请号：US12925234

申请日：2010-10-15

申请人： Toshiaki Kakutani

发明人： Toshiaki Kakutani

IPC分类号： H04N1/405

CPC分类号： H04N1/4051 ,  B41J2/2128 ,  H04N1/4105 ,  H04N1/415

摘要： The image output system of the invention collects a preset number of adjacent pixels to one pixel group to divide a number of pixels constituting an image into multiple pixel groups and specifies a pixel group tone value as a representative tone value of each pixel group. The image output system refers to a conversion table to generate dot number data of each pixel group. The conversion table stores dot number data, which represents number of dots to be created in one pixel group, in relation to a combination of a pixel group classification number allocated to each pixel group and the specified pixel group tone value of the pixel group. The image output system then refers to a priority order of pixels representing potentials of dot creation in respective pixels of one pixel group, determines the positions of dot-on pixels in each pixel group according to the generated dot number data of the pixel group, and actually creates dots according to the determined positions of the dot-on pixels. The dot number data does not include information on the positions of the dot-on pixels and has a small data volume, thus enabling high-speed data transfer. The dot number data is readily obtained by simply referring to the conversion table. This leads to high-speed output of high-quality image data. The technique of the invention thus enables easy and high-speed output of a high-quality image.

摘要翻译： 本发明的图像输出系统将预定数量的相邻像素收集到一个像素组，以将构成图像的多个像素划分为多个像素组，并将像素组色调值指定为每个像素组的代表色调值。 图像输出系统是指生成每个像素组的点数数据的转换表。 相对于分配给每个像素组的像素组分类号和像素组的指定像素组色调值的组合，转换表存储表示要在一个像素组中创建的点数的点数数据。 然后，图像输出系统参照表示一个像素组的各个像素中的点形成的电位的像素的优先顺序，根据所生成的像素组的点数数据来确定每个像素组中的点亮像素的位置，以及 实际上根据确定的点对点像素的位置创建点。 点号数据不包括关于点对点像素的位置的信息，并且具有小的数据量，从而实现高速数据传送。 通过简单地参照转换表可以容易地获得点数数据。 这导致高质量图像数据的高速输出。 因此，本发明的技术使得能够容易且高速地输出高质量的图像。

公开(公告)号：US07844120B2

公开(公告)日：2010-11-30

申请号：US11601899

申请日：2006-11-20

申请人： Toshitsugu Yamamoto

发明人： Toshitsugu Yamamoto

IPC分类号： G06K9/36

CPC分类号： H04N1/4105 ,  H04N1/415

摘要： A method for compressing image data on which a pseudo gradation process has been performed by using a dither pattern is provided. The method includes the steps of dividing the image data into predetermined blocks, calculating a typical value if an arrangement pattern of image data in each block can be reproduced by using a dither pattern that was used for the pseudo gradation process and the typical value, checking whether there is an arrangement pattern that matches the arrangement pattern of the image data in the block before then if it cannot be reproduced, calculating position data indicating a matching position if there is the arrangement pattern before then, obtaining the arrangement pattern of the image data in the block as block data if there is not the arrangement pattern before then, and using the calculated or obtained typical value, position data or block data for generating compressed data.

摘要翻译： 提供一种用于压缩通过使用抖动图案进行了伪灰度处理的图像数据的方法。 该方法包括以下步骤：将图像数据划分成预定的块，如果可以通过使用用于伪灰度处理和典型值的抖动图案来再现每个块中的图像数据的布置图案，则计算典型值 是否存在与之前的块中的图像数据的布置图案匹配的布置图案，如果不能再现，则计算指示匹配位置的位置数据，如果在之前存在布置图案，则获得图像数据的布置图案 在块中作为块数据，如果在之前没有布置模式，并且使用计算或获得的典型值，位置数据或用于生成压缩数据的块数据。

公开(公告)号：US07830553B2

公开(公告)日：2010-11-09

申请号：US10589069

申请日：2005-02-10

申请人： Toshiaki Kakutani

发明人： Toshiaki Kakutani

IPC分类号： H04N1/405

CPC分类号： H04N1/4051 ,  B41J2/2128 ,  H04N1/4105 ,  H04N1/415

摘要： The image output system of the invention collects a preset number of adjacent pixels to one pixel group to divide a number of pixels constituting an image into multiple pixel groups and specifies a pixel group tone value as a representative tone value of each pixel group. The image output system refers to a conversion table to generate dot number data of each pixel group. The conversion table stores dot number data, which represents number of dots to be created in one pixel group, in relation to a combination of a pixel group classification number allocated to each pixel group and the specified pixel group tone value of the pixel group. The image output system then refers to a priority order of pixels representing potentials of dot creation in respective pixels of one pixel group, determines the positions of dot-on pixels in each pixel group according to the generated dot number data of the pixel group, and actually creates dots according to the determined positions of the dot-on pixels. The dot number data does not include information on the positions of the dot-on pixels and has a small data volume, thus enabling high-speed data transfer. The dot number data is readily obtained by simply referring to the conversion table. This leads to high-speed output of high-quality image data. The technique of the invention thus enables easy and high-speed output of a high-quality image.

摘要翻译： 本发明的图像输出系统将预定数量的相邻像素收集到一个像素组，以将构成图像的多个像素划分为多个像素组，并将像素组色调值指定为每个像素组的代表色调值。 图像输出系统是指生成每个像素组的点数数据的转换表。 相对于分配给每个像素组的像素组分类号和像素组的指定像素组色调值的组合，转换表存储表示要在一个像素组中创建的点数的点数数据。 然后，图像输出系统参照表示一个像素组的各个像素中的点形成的电位的像素的优先顺序，根据所生成的像素组的点数数据来确定每个像素组中的点亮像素的位置，以及 实际上根据确定的点对点像素的位置创建点。 点号数据不包括关于点对点像素的位置的信息，并且具有小的数据量，从而实现高速数据传送。 通过简单地参照转换表可以容易地获得点数数据。 这导致高质量图像数据的高速输出。 因此，本发明的技术使得能够容易且高速地输出高质量的图像。

公开(公告)号：US20090021791A1

公开(公告)日：2009-01-22

申请号：US11826893

申请日：2007-07-19

申请人： Fritz Ebner ,  Peter McCandlish

发明人： Fritz Ebner ,  Peter McCandlish

IPC分类号： G06K15/00

CPC分类号： G06K15/02 ,  H04N1/4105

摘要： A method and system are provided for reducing the bit depth of grayscale imagery using multi-bit halftoning. The halftoned image data may be lossy or losslessly compressed and stored in memory or transmitted over a communication channel. At the time of printing, the images are decompressed and reconstructed to a grayscale image data using Sigma filtering to preserve edges. Preferably, different Sigma filters may be applied based on contrast information within a local neighborhood region. Fuzzy edge detection may also be used to preserve edge features and prevent smearing.

摘要翻译： 提供了一种使用多位半色调降低灰度图像的位深度的方法和系统。 半色调图像数据可以是有损的或无损地压缩的并存储在存储器中或通过通信信道传输。 在打印时，使用Sigma滤波将图像解压缩并重建为灰度图像数据以保留边缘。 优选地，可以基于局部邻域区域内的对比度信息应用​​不同的Σ滤波器。 模糊边缘检测也可用于保留边缘特征并防止拖尾。

公开(公告)号：US20080225341A1

公开(公告)日：2008-09-18

申请号：US11984522

申请日：2007-11-19

申请人： Yoshiyuki Ono ,  Takashi Sawazaki ,  Akira Saito

发明人： Yoshiyuki Ono ,  Takashi Sawazaki ,  Akira Saito

IPC分类号： G09G5/00 ,  G06K15/00 ,  H04N1/40

CPC分类号： G06T5/002 ,  G06T5/20 ,  G06T2200/12 ,  G06T2207/20021 ,  H04N1/40075 ,  H04N1/4105

摘要： An image processing circuit includes: a plurality of counters that extract image blocks each of which includes a predetermined number of pixels from input image data, count a number of pixels having a predetermined value for each of the image blocks, calculate a pixel value for each of the extracted image blocks, and output a plurality of bit streams each of which represents the counted number for a respective image block, the number of the plurality of counters being larger than a bit length defined for a single writing process with the memory divided by the bit length of a value calculated for an image block; a converter that converts the bit streams output from the plurality of counters, by adjusting a bit length of the bit streams for writing in the memory, and outputs the converted bit streams; and a synthesizer that synthesizes the plurality of bit streams output from the converter to generate a bit stream having the bit length defined for a single writing process with the memory, and outputs the generated bit stream.

摘要翻译： 图像处理电路包括：多个计数器，从输入图像数据中提取图像块，每个图像块包括预定数量的像素，对每个图像块计算具有预定值的像素数，计算每个图像块的像素值 并且输出多个比特流，每个比特流表示相应图像块的计数号码，多个计数器的数量大于为存储器划分的单个写入处理定义的比特长度，除以 为图像块计算的值的位长度; 转换器，通过调整用于在存储器中写入的比特流的比特长度来转换从多个计数器输出的比特流，并输出转换的比特流; 以及合成器，其合成从转换器输出的多个比特流，以生成具有为存储器的单个写入处理定义的比特长度的比特流，并输出生成的比特流。