公开(公告)号：US08452112B2

公开(公告)日：2013-05-28

申请号：US12364863

申请日：2009-02-03

申请人： Hiroshi Kajiwara

发明人： Hiroshi Kajiwara

IPC分类号： G06K9/46

CPC分类号： G06K9/00456 ,  H04N1/3333 ,  H04N1/41 ,  H04N2201/33357

摘要： This invention provides an apparatus which re-encodes encoded image data to generate encoded data at a higher compression ratio while suppressing any increase in the load of re-encoding. A decoder decodes each block stored in a storage, stores the decoding result in a buffer, and stores, in a holding unit, block information representing the location of the encoded data of each block in the storage. A discrimination unit discriminates a text area in the decoded image data. The image in the text area undergoes binarization and then character image data encoding. A fill-up unit replaces the value of a character/line art pixel in the text area with the average of non-character/line art pixel values. A re-encoder encodes the blocks after replacement. Inside the text area, a selector selects and outputs encoded data generated by the re-encoder. Outside the text area, the selector selects and outputs encoded data in the storage.

摘要翻译： 本发明提供了一种对编码图像数据进行重新编码以在更高压缩比下生成编码数据同时抑制重新编码的负载的任何增加的装置。 解码器解码存储在存储器中的每个块，将解码结果存储在缓冲器中，并将表示每个块的编码数据的位置的块信息存储在存储单元中。 识别单元鉴别解码图像数据中的文本区域。 文本区域中的图像经过二值化，然后进行字符图像数据编码。 填充单元将文本区域中的字符/线条像素的值替换为非字符/线条艺术像素值的平均值。 重新编码器在更换后对块进行编码。 在文本区域内，选择器选择并输出由编码器生成的编码数据。 在文本区域之外，选择器选择并输出存储器中的编码数据。

公开(公告)号：US07903734B2

公开(公告)日：2011-03-08

申请号：US10823612

申请日：2004-04-14

申请人： Hiroshi Kajiwara

发明人： Hiroshi Kajiwara

IPC分类号： H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC分类号： H04N19/635 ,  H04N19/122 ,  H04N19/124 ,  H04N19/162 ,  H04N19/63 ,  H04N19/647 ,  H04N19/70

摘要： A moving image decoding apparatus for decoding encoded moving image data, which is generated by decomposing each frame of moving image data into a plurality of subbands, and bitplane-encoding coefficients of the subbands for each predetermined unit, includes a decoding process time measurement unit (105) for acquiring information used to examine a difference of a time required for the decoding process of encoded moving image data for the predetermined unit, a non-decoding bitplane determination unit (107) for determining bitplanes which are not to be decoded on the basis of the obtained information, a bitplane decoder for reclaiming the coefficients of the subbands from encoded data of bitplanes other than the non-decoding bitplanes, and an inverse discrete wavelet transformer (104) for generating frame data by compositing the reclaimed coefficients of the subbands.

摘要翻译： 一种用于将通过将运动图像数据的每帧分解成多个子带而生成的编码运动图像数据的运动图像解码装置和每个预定单元的子带的位平面编码系数包括解码处理时间测量单元 105），用于获取用于检查用于预定单元的编码运动图像数据的解码处理所需的时间差的信息;非解码位平面确定单元（107），用于基于该解码位图确定单元确定不被解码的位平面 获得的信息的解码器，用于从除非解码位平面以外的位平面的编码数据中回收子带的系数的位平面解码器，以及用于通过合成子带的再生系数来生成帧数据的反离散小波变换器（104）。

公开(公告)号：US07783119B2

公开(公告)日：2010-08-24

申请号：US11683033

申请日：2007-03-07

申请人： Hiroshi Kajiwara

发明人： Hiroshi Kajiwara

IPC分类号： G06K9/36

CPC分类号： H04N19/91 ,  H04N19/50

摘要： The present invention is able to determine an encoding parameter using a simple method with little processing load or memory cost, and enables encoding of image data with excellent compression performance. To this end, a prediction error generating unit of an encoding apparatus according to the present invention calculates the difference (prediction error) between a pixel of interest and a predicted value. A prediction order conversion unit converts the prediction error to a non-negative integer, and outputs the non-negative integer as a prediction order M(e). A Golomb encoding unit performs encoding in accordance with a k parameter supplied from a k parameter updating unit. The k parameter updating unit updates the k parameter for use in the next updating based on the prediction order M(e) of the pixel of interest and the k parameter supplied to the Golomb encoding unit.

摘要翻译： 本发明能够使用具有很少的处理负荷或存储器成本的简单方法来确定编码参数，并且能够以优异的压缩性能对图像数据进行编码。 为此，根据本发明的编码装置的预测误差生成单元计算感兴趣像素与预测值之间的差（预测误差）。 预测顺序转换单元将预测误差转换为非负整数，并输出非负整数作为预测顺序M（e）。 Golomb编码单元根据从k参数更新单元提供的k参数进行编码。 基于感兴趣像素的预测顺序M（e）和提供给哥伦布编码单元的k参数，k参数更新单元更新k参数以用于下一次更新。

公开(公告)号：US07529417B2

公开(公告)日：2009-05-05

申请号：US11176665

申请日：2005-07-08

申请人： Mitsuru Maeda ,  Hiroshi Kajiwara

发明人： Mitsuru Maeda ,  Hiroshi Kajiwara

IPC分类号： G06K9/36 ,  G06K9/46 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC分类号： G06T9/20 ,  H04N19/103 ,  H04N19/126 ,  H04N19/136 ,  H04N19/17 ,  H04N19/18 ,  H04N19/196 ,  H04N19/198 ,  H04N19/20 ,  H04N19/42 ,  H04N19/59 ,  H04N19/61 ,  H04N19/647

摘要： An image encoding/decoding apparatus is provided, including a frequency band division unit for dividing image data into a plurality of frequency bands to generate sub-band coefficients, a sub-band coefficient interpolation unit for interpolating sub-band coefficients outside a region of a shape by using shape information representing a shape of the image data and the sub-band coefficients in the region of the shape, an encoding unit for encoding the interpolated sub-band coefficients to generate encoded data, and a shape information encoding unit for encoding the shape information to generate shape information encoded data.

摘要翻译： 提供一种图像编码/解码装置，包括用于将图像数据划分成多个频带以产生子带系数的频带分割单元，用于内插子带系数区域之外的子带系数的子带系数内插单元 通过使用表示形状区域中的图像数据和子带系数的形状的形状信息的形状信息，用于对插值的子带系数进行编码以产生编码数据的编码单元，以及用于对 形状信息生成形状信息编码数据。

公开(公告)号：US06985630B2

公开(公告)日：2006-01-10

申请号：US09962109

申请日：2001-09-26

申请人： Hiroshi Kajiwara

发明人： Hiroshi Kajiwara

IPC分类号： G06K9/36 ,  G06K9/46

CPC分类号： H04N19/63 ,  H04N19/13 ,  H04N19/70

摘要： To provide an image processing apparatus and method, a program, and a storage medium which enables, in the case where encoded data is generated by encoding image data including mixed multi-level data and bi-level image data and the encoded data is then decoded, to read bi-level image data from the decoded image in spite of its low resolution. The multi-level image data and bi-level image data are separated and hierarchical encoding is performed on the multi-level image data so as to be decoded with multiple resolutions. Multiple pieces of bi-level data to be superimposed on the decoded image of multiple resolutions are prepared and encoded. The encoded bi-level image data is selected for decoding according to the resolution of the decoded image in the decoding process, and superimposed on the decoded multi-level image.

公开(公告)号：US06879726B2

公开(公告)日：2005-04-12

申请号：US09793538

申请日：2001-02-27

申请人： Makoto Sato ,  Hiroshi Kajiwara ,  Hiroki Kishi

发明人： Makoto Sato ,  Hiroshi Kajiwara ,  Hiroki Kishi

IPC分类号： H04N5/92 ,  G06T1/60 ,  G06T9/00 ,  H03M7/30 ,  H04N1/41 ,  H04N19/13 ,  H04N19/149 ,  H04N19/176 ,  H04N19/196 ,  H04N19/34 ,  H04N19/423 ,  H04N19/426 ,  H04N19/60 ,  H04N19/63 ,  H04N19/91 ,  G06K9/46

CPC分类号： G06T1/60 ,  G06T9/007

摘要： An image processing apparatus includes a wavelet transformation unit for wavelet-transforming input image data on a per-image basis, and an encoder for changing transformation coefficients, which have been obtained by the transformation, to bit planes from higher- to lower-order bits, and encoding the bit planes one bit plane at a time. A code-quantity prediction unit determines whether all encoded data of each of the image data that have been encoded can be stored in the memory when the encoded data obtained by the encoder is stored in the memory image by image. If all of the encoded data cannot be stored, the encoded data that overflows the memory is divided and the divided encoded data is stored in the memory by writing the divided encoded data equally over storage areas of the lower-order bit planes of each of the image.

摘要翻译： 一种图像处理装置包括：用于将基于每个图像的输入图像数据进行小波变换的小波变换单元和用于将由变换获得的变换系数改变为从高位到低位的位平面的编码器 并且一次编码位平面一位平面。 当由编码器获得的编码数据以图像存储在存储器图像中时，码量预测单元确定已经编码的每个图像数据的所有编码数据是否可以存储在存储器中。 如果所有的编码数据都不能被存储，那么溢出存储器的编码数据被划分，并且分割的编码数据被存储在存储器中，通过将划分的编码数据在每个的低位位平面的存储区域上相等地写入 图片。

公开(公告)号：US06665444B1

公开(公告)日：2003-12-16

申请号：US09558654

申请日：2000-04-26

申请人： Hiroshi Kajiwara

发明人： Hiroshi Kajiwara

IPC分类号： G06K936

CPC分类号： G06T9/007 ,  H04N19/42 ,  H04N19/63

摘要： In accordance with this invention, when an image is compressed using a wavelet transform, the amount of memory storage capacity required for performing the transform is minimized. An image processing apparatus according to this transforming, in a one-dimensional direction, image data to be coded; a second transform unit for frequency-transforming, in a different one-dimensional direction, and at least some of the frequency components obtained by the first transform unit; and a coding unit for entropy-coding those ones of the frequency components which are not frequency-transformed by the second transform unit among the frequency components obtained by the first transform unit, and for entropy-coding frequency components obtained by the second transform unit.

摘要翻译： 根据本发明，当使用小波变换压缩图像时，执行变换所需的存储器存储容量的量被最小化。 根据本发明的图像处理装置包括：第一变换单元，用于在一维方向上对要编码的图像数据进行频率变换; 第二变换单元，用于在不同的一维方向上对第一变换单元获得的频率分量中的至少一些进行频率变换; 以及编码单元，用于对由第一变换单元获得的频率分量之中的第二变换单元未被频率变换的频率分量中的那些频率分量进行熵编码，以及对由第二变换单元获得的熵编码频率分量进行熵编码。

公开(公告)号：US06549676B1

公开(公告)日：2003-04-15

申请号：US09412432

申请日：1999-10-05

申请人： Tadayoshi Nakayama ,  Hiroshi Kajiwara ,  Takeshi Yamazaki

发明人： Tadayoshi Nakayama ,  Hiroshi Kajiwara ,  Takeshi Yamazaki

IPC分类号： G06K936

CPC分类号： G06T9/004

摘要： The objective of the present invention is to perform fast variable-length coding that is applied for lossless compression and encoding. To achieve this objective, an encoding device comprises a unit for determining, from a plurality of states, states of peripheral pixels of an object pixel to be encoded, a unit for producing a predicted value of the object pixel based on the peripheral pixels, a memory used for storing a k parameter (k≦0) for each of the plurality of states, a unit for encoding a prediction difference between the value of the object pixel and a predicted value to variable-length code having a code length that is obtained by using the prediction difference and the k parameter that is stored in the memory and corresponds to the state determined by the state determination unit and a unit for, after variable-length encoding is performed for the object pixel, updating in advance the k parameter in order to perform variable-length encoding for another pixel that has the same state as the state determined by the state determination unit, and for writing the k parameter to the memory.

摘要翻译： 本发明的目的是执行用于无损压缩和编码的快速可变长度编码。 为了实现该目的，编码装置包括用于从多个状态确定要编码的对象像素的周边像素的状态的单元，用于基于周边像素产生对象像素的预测值的单元， 用于存储多个状态中的每一个的ak参数（k <= 0）的存储器，用于将对象像素的值与预测值之间的预测差编码为具有获得的代码长度的可变长度代码的单元 通过使用存储在存储器中的预测差和k参数，并且对应于由状态确定单元确定的状态，并且在针对对象像素执行可变长度编码之后的单元，预先更新k参数 为与由状态判定单元确定的状态具有相同状态的另一像素执行可变长度编码，并将k参数写入存储器。

公开(公告)号：US06501859B1

公开(公告)日：2002-12-31

申请号：US09370198

申请日：1999-08-09

申请人： Hiroshi Kajiwara

发明人： Hiroshi Kajiwara

IPC分类号： G06K936

CPC分类号： H04N19/00 ,  H04N19/10 ,  H04N19/115 ,  H04N19/117 ,  H04N19/12 ,  H04N19/122 ,  H04N19/14 ,  H04N19/146 ,  H04N19/15 ,  H04N19/172 ,  H04N19/176 ,  H04N19/60 ,  H04N19/63 ,  H04N19/635 ,  H04N19/645 ,  H04N19/70

摘要： This invention has as its object to implement efficient encoding in correspondence with the characteristics of an image in an arrangement that can transform an input image into a plurality of frequency bands. To achieve this object, an image processing apparatus has generation means for generating a plurality of sample values representing an image, transforming means for frequency-transforming the plurality of sample values into coefficients of a plurality of frequency bands, encoding means for generating first encoded data by encoding the plurality of sample values, and generating second encoded data by encoding the plurality of coefficients obtained by the transforming means, comparing means for comparing the amounts of the first and second encoded data obtained by encoding of the encoding means, and selection means for outputting one of the first and second encoded data in accordance with the comparison result of the comparing means.

摘要翻译： 本发明的目的是实现与能够将输入图像变换为多个频带的布置中的图像的特性对应的高效编码。 为了实现该目的，图像处理装置具有产生表示图像的多个采样值的发生装置，用于将多个采样值频率变换为多个频带的系数的变换装置，用于产生第一编码数据的编码装置 通过对多个样本值进行编码，并且通过对由变换装置获得的多个系数进行编码来生成第二编码数据，比较装置，用于比较通过编码装置的编码获得的第一和第二编码数据的数量;以及选择装置， 根据比较装置的比较结果输出第一和第二编码数据之一。

公开(公告)号：US06337929B1

公开(公告)日：2002-01-08

申请号：US09160091

申请日：1998-09-25

申请人： Hiroshi Kajiwara ,  Makoto Sato

发明人： Hiroshi Kajiwara ,  Makoto Sato

IPC分类号： G06K936

CPC分类号： G06T9/004 ,  G06T9/007

摘要： A system which can efficiently compress any one of a multivalue image and a binary image and can preferably keep a high picture quality is provided. To accomplish this object, the system has means for generating conversion coefficients of M values by converting input image data by a first system, means for generating conversion coefficients of N values (N>M) by converting the input image data by a second system and means for outputting first information showing a position where a significant conversion coefficient exists in a block constructed by the conversion coefficients of M values or the conversion coefficients of N values and second information showing the significant conversion coefficient. Block division information which is generated by a block dividing process as an element technique of the image encoding system is efficiently entropy encoded. To accomplish it, the system has means for outputting division information showing whether each of a plurality of blocks including an encoding subject block has further been divided into a plurality of blocks or not and means for entropy encoding the division information corresponding to the encoding subject block on the basis of a presumption probability according to a division situation of a neighboring block of the encoding subject block.

摘要翻译： 可以提供可以有效地压缩多值图像和二值图像中的任何一个并且可以优选地保持高图像质量的系统。 为了实现该目的，系统具有通过第一系统转换输入图像数据来产生M值的转换系数的装置，用于通过将第二系统转换输入图像数据来产生N个值（N> M）的转换系数的装置，以及 用于输出表示在由M值的转换系数或N值的转换系数构成的块中存在显着转换系数的位置的第一信息的装置，以及表示显着转换系数的第二信息。 通过作为图像编码系统的元素技术的块分割处理生成的块分割信息被有效地熵编码。 为了完成它，系统具有用于输出分割信息的装置，该分割信息表示包括编码对象块的多个块中的每一个是否进一步被划分为多个块，以及用于对编码对象块对应的划分信息进行熵编码的装置 基于根据编码对象块的相邻块的分割情况的推测概率。