公开(公告)号：US20060045362A1

公开(公告)日：2006-03-02

申请号：US11193569

申请日：2005-08-01

申请人： Naoki Ito ,  Hirokazu Tamura ,  Hiroshi Kajiwara ,  Yuki Matsumoto ,  Hidefumi Osawa ,  Ken-ichi Ohta ,  Haruo Shimizu

发明人： Naoki Ito ,  Hirokazu Tamura ,  Hiroshi Kajiwara ,  Yuki Matsumoto ,  Hidefumi Osawa ,  Ken-ichi Ohta ,  Haruo Shimizu

IPC分类号： G06K9/36

CPC分类号： H04N19/12 ,  H04N19/15

摘要： According to this invention, encoded data of a target data amount is generated by one image input operation while both lossless encoding and lossy encoding are adopted. For this purpose, a first memory stores encoded data of a shorter encode length among encoded data generated by a first encoding unit which performs lossy encoding and encoded data generated by a second encoding unit which performs lossless encoding. A second memory stores encoded data from a second encoding unit. When an encoding sequence control unit determines that the encoded data amount in the first memory has exceeded the target data amount, the encoding sequence control unit discards data in the first memory, sets a quantization parameter for a higher compression ratio for the first encoding unit, and causes the first encoding unit to execute encoding. Encoded data before the encoded data amount is determined to have exceeded the target data amount is re-encoded by a re-encoding unit.

摘要翻译： 根据本发明，通过一个图像输入操作产生目标数据量的编码数据，同时采用无损编码和有损编码。 为此，第一存储器存储由执行有损编码的第一编码单元生成的编码数据中的较短编码长度的编码数据和进行无损编码的第二编码单元生成的编码数据。 第二存储器存储来自第二编码单元的编码数据。 当编码序列控制单元确定第一存储器中的编码数据量已经超过目标数据量时，编码序列控制单元丢弃第一存储器中的数据，为第一编码单元设置较高压缩比的量化参数， 并使第一编码单元执行编码。 确定已经超过目标数据量的编码数据量之前的编码数据被重新编码单元重新编码。

公开(公告)号：US07680345B2

公开(公告)日：2010-03-16

申请号：US11193569

申请日：2005-08-01

申请人： Naoki Ito ,  Hirokazu Tamura ,  Hiroshi Kajiwara ,  Yuki Matsumoto ,  Hidefumi Osawa ,  Ken-ichi Ohta ,  Haruo Shimizu

发明人： Naoki Ito ,  Hirokazu Tamura ,  Hiroshi Kajiwara ,  Yuki Matsumoto ,  Hidefumi Osawa ,  Ken-ichi Ohta ,  Haruo Shimizu

IPC分类号： G06K9/36

CPC分类号： H04N19/12 ,  H04N19/15

摘要： According to this invention, encoded data of a target data amount is generated by one image input operation while both lossless encoding and lossy encoding are adopted. For this purpose, a first memory stores encoded data of a shorter encode length among encoded data generated by a first encoding unit which performs lossy encoding and encoded data generated by a second encoding unit which performs lossless encoding. A second memory stores encoded data from a second encoding unit. When an encoding sequence control unit determines that the encoded data amount in the first memory has exceeded the target data amount, the encoding sequence control unit discards data in the first memory, sets a quantization parameter for a higher compression ratio for the first encoding unit, and causes the first encoding unit to execute encoding. Encoded data before the encoded data amount is determined to have exceeded the target data amount is re-encoded by a re-encoding unit.

摘要翻译： 根据本发明，通过一个图像输入操作产生目标数据量的编码数据，同时采用无损编码和有损编码。 为此，第一存储器存储由执行有损编码的第一编码单元生成的编码数据中的较短编码长度的编码数据和进行无损编码的第二编码单元生成的编码数据。 第二存储器存储来自第二编码单元的编码数据。 当编码序列控制单元确定第一存储器中的编码数据量已经超过目标数据量时，编码序列控制单元丢弃第一存储器中的数据，为第一编码单元设置较高压缩比的量化参数， 并使第一编码单元执行编码。 确定已经超过目标数据量的编码数据量之前的编码数据被重新编码单元重新编码。

公开(公告)号：US07194140B2

公开(公告)日：2007-03-20

申请号：US10286776

申请日：2002-11-04

申请人： Naoki Ito ,  Tadayoshi Nakayama ,  Ken-ichi Ohta ,  Hidefumi Osawa ,  Shinichi Kato

发明人： Naoki Ito ,  Tadayoshi Nakayama ,  Ken-ichi Ohta ,  Hidefumi Osawa ,  Shinichi Kato

IPC分类号： G06K9/36 ,  G06K1/00

CPC分类号： H04N1/3333 ,  G06K15/1852 ,  H04N1/32128 ,  H04N1/40062 ,  H04N1/41 ,  H04N2201/3243 ,  H04N2201/3278 ,  H04N2201/33357

摘要： This invention has as its object to provide an image processing apparatus, which can obviate the need for image re-input, can effectively generate encoded data that falls within a set size, and can minimize deterioration of image quality. To this end, an image processing apparatus according to this invention includes first discrimination unit for discriminating the type of image of each of a plurality of regions, which form image data input, second discrimination unit for discriminating if the image data is inputted by a continuous scan of images, selection unit for selecting an encoding method used in compression of each region on the basis of discrimination results of the first and second discrimination unit, first compression unit for compressing image data of each region using the encoding method selected by the selection unit, and second compression unit for compressing information that pertains to the type of image of each region.

摘要翻译： 本发明的目的是提供一种可以避免对图像重新输入的需要的图像处理装置，可以有效地生成落在设定尺寸内的编码数据，并且可以最小化图像质量的劣化。 为此，根据本发明的图像处理装置包括：第一鉴别单元，用于鉴别形成图像数据的多个区域中的每一个的图像类型;第二鉴别单元，用于鉴别图像数据是否由 连续扫描图像，选择单元，用于基于第一和第二鉴别单元的鉴别结果来选择用于压缩每个区域的编码方法;第一压缩单元，用于使用所选择的编码方法压缩每个区域的图像数据 以及用于压缩与每个区域的图像类型有关的信息的第二压缩单元。

公开(公告)号：US07257264B2

公开(公告)日：2007-08-14

申请号：US10230276

申请日：2002-08-29

申请人： Tadayoshi Nakayama ,  Ken-Ichi Ohta ,  Hidefumi Osawa ,  Shinichi Kato ,  Naoki Ito

发明人： Tadayoshi Nakayama ,  Ken-Ichi Ohta ,  Hidefumi Osawa ,  Shinichi Kato ,  Naoki Ito

IPC分类号： G06K9/36 ,  G06K9/46

CPC分类号： H04N1/411 ,  H04N19/124 ,  H04N19/15 ,  H04N19/192 ,  H04N19/40 ,  H04N19/423 ,  H04N19/436 ,  H04N19/60

摘要： From inputted multilevel image data it is generated, for each pixel, image area information constituted by an image area component indicating whether the pixel exists in a character•line drawing area or halftone area and an image area component indicating whether the pixel is chromatic or achromatic. The information is encoded by a lossless encoding unit on a block basis and stored, and an amount of code is monitored. When the amount of code exceeds a target amount, the lossless encoding unit performs encoding upon changing image area components, of subsequently input image area components, which coincide with a condition. The codes that have already been stored are temporarily decoded by a lossless code re-encoding unit, and the above image area components are changed. The resultant data is then re-encoded and stored.

摘要翻译： 从输入的多级图像数据，对于每个像素，生成由表示像素是否存在于字符线绘制区域或半色调区域中的图像区域分量构成的图像区域信息以及指示像素是彩色还是非彩色的图像区域分量 。 信息由无损编码单元以块为单位编码并存储，并且监视代码量。 当代码量超过目标量时，无损编码单元在改变与条件一致的随后输入的图像区域分量的图像区域分量时执行编码。 已经存储的代码由无损代码重新编码单元临时解码，并且上述图像区域分量被改变。 然后将所得数据重新编码并存储。

公开(公告)号：US07127115B2

公开(公告)日：2006-10-24

申请号：US10393069

申请日：2003-03-21

申请人： Hidefumi Osawa ,  Tadayoshi Nakayama ,  Ken-ichi Ohta ,  Shinichi Kato ,  Naoki Ito

发明人： Hidefumi Osawa ,  Tadayoshi Nakayama ,  Ken-ichi Ohta ,  Shinichi Kato ,  Naoki Ito

IPC分类号： G06K9/36 ,  G06K9/46

CPC分类号： G06T9/005

摘要： The present invention allows an image to be coded within a target size without necessitating the image to be input again during the coding of the image, with a mode reflecting a user's intention for coding. To solve this problem, input image data is coded at coding unit 102 and stored into first and second memories, respectively. Coding sequence unit 108 monitors the quantity of codes. When a set value is determined to be reached, coding sequence unit 108 makes data in first memory to be discarded and directs coding means to further increase a quantization step, and continues coding. As previous coded data is stored in second memory, the data is re-coded with the same quantization step as that of coding unit 102 after changing of a parameter at re-coding unit 109, and the re-coded data is stored into first and second memory. At this moment, coding unit 102 and re-coding unit 109 perform an operation and coding on quantization error according to a mode of quantization operation designated at mode designation unit 125.

摘要翻译： 本发明允许将图像编码在目标尺寸内，而不需要在图像编码期间再次输入图像，其中模式反映用户的编码意图。 为了解决这个问题，输入图像数据被分别编码在编码单元102中并存储到第一和第二存储器中。 编码序列单元108监视代码的数量。 当确定要达到设定值时，编码序列单元108使第一存储器中的数据被丢弃，并指示编码装置进一步增加量化步长，并继续编码。 由于先前的编码数据存储在第二存储器中，所以在重新编码单元109中改变参数之后，以与编码单元102相同的量化级重新编码数据，并将重新编码的数据存储在第一存储器 第二个记忆 此时，编码单元102和重新编码单元109根据在模式指定单元125指定的量化操作的模式来执行对量化误差的操作和编码。

公开(公告)号：US07106911B2

公开(公告)日：2006-09-12

申请号：US10171647

申请日：2002-06-17

申请人： Ken-ichi Ohta ,  Tadayoshi Nakayama ,  Hidefumi Osawa ,  Shinichi Kato ,  Naoki Ito

发明人： Ken-ichi Ohta ,  Tadayoshi Nakayama ,  Hidefumi Osawa ,  Shinichi Kato ,  Naoki Ito

IPC分类号： G06K9/36 ,  G06K1/00

CPC分类号： H04N1/41 ,  H04N19/126 ,  H04N19/15 ,  H04N19/156 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/192 ,  H04N19/42 ,  H04N19/423 ,  H04N19/60

摘要： An image input through an input unit is compressed by an encoding unit and stored in first and second memories. A first counter counts the data in its code amount. When the amount of encoded data generated reaches a predetermined size, an encoding sequence control unit sets quantization steps in the encoding unit and re-encoding unit to increase compression ratios. The encoding sequence control unit clears the first memory, causes the re-encoding unit to re-encode the encoded data stored in the second memory, and stores the resultant data in the first memory. Since the encoding unit continues encoding data with the set quantization step, the encoded data are stored in the first memory from the start of the image. Subsequently, every time the data amount stored in the first memory reaches a predetermined amount, the quantization step is increased, and the processing is repeated.

摘要翻译： 通过输入单元输入的图像由编码单元压缩并存储在第一和第二存储器中。 第一个计数器以其代码量计数数据。 当生成的编码数据量达到预定大小时，编码序列控制单元在编码单元和再编码单元中设置量化步长以增加压缩率。 编码序列控制单元清除第一存储器，使再编码单元重新编码存储在第二存储器中的编码数据，并将结果数据存储在第一存储器中。 由于编码单元以设定的量化步长继续编码数据，所以编码数据从图像的开始被存储在第一存储器中。 随后，每当存储在第一存储器中的数据量达到预定量时，增加量化步长，并重复处理。

公开(公告)号：US20080137961A1

公开(公告)日：2008-06-12

申请号：US11871796

申请日：2007-10-12

申请人： Yoshihiro Ishida ,  Xiaoyan Dai ,  Hidefumi Osawa

发明人： Yoshihiro Ishida ,  Xiaoyan Dai ,  Hidefumi Osawa

IPC分类号： G06K9/48

CPC分类号： G06K9/481

摘要： An image processing apparatus can generate a vector sequence representing each color region of a color image. The image processing apparatus divides the image into plural regions based on attribute information of the image, and extracts region boundary information relating to a boundary line between different regions. The image processing apparatus generates inter-edge point vector data for each boundary connecting a first edge point to a second edge point corresponding to intersections of boundaries between neighboring regions, based on the extracted region boundary information. The image processing apparatus identifies one or more inter-edge point vector data representing a boundary of each divided region based on the generated inter-edge point vector data, and generates individual region vector data.

摘要翻译： 图像处理装置可以生成表示彩色图像的各颜色区域的矢量序列。 图像处理装置基于图像的属性信息将图像划分为多个区域，并且提取与不同区域之间的边界线有关的区域边界信息。 图像处理装置基于所提取的区域边界信息，生成用于连接第一边缘点与对应于相邻区域之间的边界的交点的第二边缘点的每个边界的边缘边缘向量数据。 图像处理装置基于生成的边缘点向量数据来识别表示每个分割区域的边界的一个或多个边缘内向量向量数据，并生成各个区域向量数据。

公开(公告)号：US07343084B2

公开(公告)日：2008-03-11

申请号：US10628452

申请日：2003-07-29

申请人： Hiroki Kishi ,  Hidefumi Osawa ,  Takeshi Yamazaki

发明人： Hiroki Kishi ,  Hidefumi Osawa ,  Takeshi Yamazaki

IPC分类号： H04N5/91 ,  H04N7/26

CPC分类号： H04N19/63 ,  H04N5/772 ,  H04N5/783 ,  H04N9/7921 ,  H04N9/8047

摘要： This invention can play back a smooth moving image in both normal and slow playback modes in consideration of the human visual recognition level, even when moving image data to be decoded (played back) is recorded (encoded) at a high frame rate. To this end, in this invention, respective frames, which form a moving image at 60 frames/sec, are compressed to be independently decodable. In the normal playback mode, since frames are played back using one of two frames (decimating one of two frames), a moving image is played back at 30 frames/sec which can assure sufficiently high image quality as a moving image. On the other hand, in the slow play back mode, since the number of frames to be decimated is set to be zero, and 60 frames are played back for 2 sec, a moving image is played back at the same frame rate of 30 frames/sec as that in the normal playback mode.

摘要翻译： 考虑到人类视觉识别水平，本发明可以在正常和慢速播放模式中播放平滑的运动图像，即使当以高帧速率记录（编码）待解码（回放）的运动图像数据时。 为此，在本发明中，以60帧/秒形成运动图像的各个帧被压缩为独立地可解码。 在正常播放模式中，由于使用两帧中的一个（对二帧中的一帧进行抽取）来播放帧，所以以30帧/秒的速度播放运动图像，这可以确保足够高的图像质量作为运动图像。 另一方面，在慢播放模式中，由于要抽取的帧数被设置为零，并且将60帧重放为2秒，所以以30帧的相同帧速率播放运动图像 /秒为正常播放模式。

公开(公告)号：US6167160A

公开(公告)日：2000-12-26

申请号：US167575

申请日：1998-10-07

申请人： Hidefumi Osawa

发明人： Hidefumi Osawa

IPC分类号： G06T9/00 ,  G06K9/00

CPC分类号： G06T9/005

摘要： Coding efficiency is improved by adopting dynamic probability estimation, and the adaptation rate is adjusted by a minimum number of times by adding means for detecting a change in predicted state of encoding, thereby shortening encoding/decoding time.In an arithmetic encoding/decoding method for updating a cumulative probability when the generation frequency of a symbol to be encoded/decoded exceeds an allowable maximum value, an entropy associated with the generation state of the symbol to be encoded/decoded is calculated when the generation frequency has exceeded the allowable maximum value (S103), it is determined if the currently calculated entropy and previously calculated entropy have a significant difference (S104), and the cumulative probability is updated when it is determined that the two entropy values have the significant difference (S105).

摘要翻译： 通过采用动态概率估计来提高编码效率，并且通过添加用于检测编码预测状态的变化的装置来调整适应率最小次数，从而缩短编码/解码时间。 在用于在要编码/解码的符号的生成频率超过容许最大值时更新累积概率的算术编码/解码方法中，当生成代码时，计算与要编码/解码的符号的生成状态相关联的熵 频率已经超过允许的最大值（S103），则确定当前计算的熵和先前计算的熵是否具有显着差异（S104），并且当确定两个熵值具有显着差异时，累积概率被更新 （S105）。

公开(公告)号：US5610999A

公开(公告)日：1997-03-11

申请号：US266665

申请日：1994-06-28

申请人： Yuichi Bannai ,  Kunihiro Yamamoto ,  Hidefumi Osawa

发明人： Yuichi Bannai ,  Kunihiro Yamamoto ,  Hidefumi Osawa

IPC分类号： G06T5/00 ,  H04N1/403 ,  G06K9/36

CPC分类号： G06T7/0083 ,  H04N1/403 ,  H04N1/4053

摘要： There is disclosed a method for converting multi-level image data into binary image data and an apparatus therefor. An average density is calculated from the already binarized density of pixels positioned in a predetermined area around an object pixel, and the threshold value for binarization is set by adding a fixed bias value and varying dither signals to the average density, and the error generated in the binarization is distributed to the unbinarized pixels positioned behind. The addition of the fixed bias prevents formation of a spot-free white area in the vicinity of an edge or in the initial stage of processing, and the addition of dither signals prevents texture formation in the low density area.

摘要翻译： 公开了一种将多级图像数据转换为二进制图像数据的方法及其装置。 从位于物体像素周围的预定区域中的像素的已经二进制化的密度计算平均密度，并且通过将固定偏置值和变化的抖动信号加到平均密度来设置用于二值化的阈值，并且在 二值化被分配到位于后面的未定标的像素。 固定偏置的添加防止在边缘附近或处理的初始阶段形成无斑点的白色区域，并且加入抖动信号可防止低密度区域中的纹理形成。