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1. 发明申请

US20060045362A1 Image encoding apparatus and method, computer program, and computer-readable storage medium 有权
标题翻译：图像编码装置和方法，计算机程序和计算机可读存储介质
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。

2. 发明授权

US07680345B2 Image encoding apparatus and method, computer program, and computer-readable storage medium 有权
标题翻译：图像编码装置和方法，计算机程序和计算机可读存储介质
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。

3. 发明申请

US20100142840A1 IMAGE ENCODING APPARATUS AND METHOD OF CONTROLLING THE SAME 有权
标题翻译：图像编码装置及其控制方法
公开(公告)号：US20100142840A1
公开(公告)日：2010-06-10
申请号：US12620241
申请日：2009-11-17
申请人： Hiroshi Kajiwara , Yuki Shiraishi , Naoki Ito , Hirokazu Tamura
发明人： Hiroshi Kajiwara , Yuki Shiraishi , Naoki Ito , Hirokazu Tamura
IPC分类号： G06K9/36
CPC分类号： H04N19/59 , H04N19/12 , H04N19/14 , H04N19/17 , H04N19/176 , H04N19/46 , H04N19/587 , H04N19/60 , H04N19/70
摘要： Resolution interpolation data is generated by relatively simple processing. This enables image encoding by simple and quick processing to attain high image quality and high compression performance. To do this, a tile divider extracts tile data of 32×32 pixels from encoding target original image data. A resolution converter samples one pixel of a block of 2×2 pixels in the tile data, thereby generating reduced tile data of a reduced image. An interpolation data generator generates interpolation data to be used to generate tile data having the original resolution from the reduced tile data. Based on the interpolation data of a tile of interest, an encoding method selector outputs a control signal indicating which one of lossless encoding and lossy encoding should be executed for the reduced tile data. A code stream generator outputs the generated encoded data and interpolation data as encoded image data.
摘要翻译：通过相对简单的处理生成分辨率插值数据。这使得能够通过简单快速的处理实现图像编码，从而获得高图像质量和高压缩性能。为此，瓦片分割器从编码目标原始图像数据中提取32×32像素的图块数据。分辨率转换器对瓦片数据中的2×2像素的块的一个像素进行采样，从而生成缩小图像的减少的瓦片数据。内插数据生成器生成用于从缩小的瓦片数据生成具有原始分辨率的瓦片数据的内插数据。基于感兴趣的图块的内插数据，编码方法选择器输出指示对于缩小的瓦片数据应当执行哪一个无损编码和有损编码的控制信号。代码流生成器将生成的编码数据和内插数据输出为编码图像数据。

4. 发明授权

US08396308B2 Image coding based on interpolation information 有权
标题翻译：基于插值信息的图像编码
公开(公告)号：US08396308B2
公开(公告)日：2013-03-12
申请号：US12620241
申请日：2009-11-17
申请人： Hiroshi Kajiwara , Yuki Shiraishi , Naoki Ito , Hirokazu Tamura
发明人： Hiroshi Kajiwara , Yuki Shiraishi , Naoki Ito , Hirokazu Tamura
IPC分类号： G06K9/36
CPC分类号： H04N19/59 , H04N19/12 , H04N19/14 , H04N19/17 , H04N19/176 , H04N19/46 , H04N19/587 , H04N19/60 , H04N19/70
摘要： Resolution interpolation data is generated by relatively simple processing. This enables image encoding by simple and quick processing to attain high image quality and high compression performance. To do this, a tile divider extracts tile data of 32×32 pixels from encoding target original image data. A resolution converter samples one pixel of a block of 2×2 pixels in the tile data, thereby generating reduced tile data of a reduced image. An interpolation data generator generates interpolation data to be used to generate tile data having the original resolution from the reduced tile data. Based on the interpolation data of a tile of interest, an encoding method selector outputs a control signal indicating which one of lossless encoding and lossy encoding should be executed for the reduced tile data. A code stream generator outputs the generated encoded data and interpolation data as encoded image data.
摘要翻译：通过相对简单的处理生成分辨率插值数据。这使得能够通过简单快速的处理实现图像编码，从而获得高图像质量和高压缩性能。为此，瓦片分割器从编码目标原始图像数据中提取32×32像素的图块数据。分辨率转换器对瓦片数据中的2×2像素的块的一个像素进行采样，从而生成缩小图像的减少的瓦片数据。内插数据生成器生成用于从缩小的瓦片数据生成具有原始分辨率的瓦片数据的内插数据。基于感兴趣的图块的内插数据，编码方法选择器输出指示对于缩小的瓦片数据应当执行哪一个无损编码和有损编码的控制信号。代码流生成器将生成的编码数据和内插数据输出为编码图像数据。

5. 发明申请

US20100124380A1 IMAGE ENCODING APPARATUS AND METHOD OF CONTROLLING THE SAME 有权
标题翻译：图像编码装置及其控制方法
公开(公告)号：US20100124380A1
公开(公告)日：2010-05-20
申请号：US12620194
申请日：2009-11-17
申请人： Yuki Shiraishi , Hiroshi Kajiwara , Naoki Ito , Hirokazu Tamura
发明人： Yuki Shiraishi , Hiroshi Kajiwara , Naoki Ito , Hirokazu Tamura
IPC分类号： G06K9/36 , G06K9/32
CPC分类号： H04N1/41 , H04N19/105 , H04N19/132 , H04N19/136 , H04N19/176 , H04N19/70
摘要： This invention generates efficient encoded data to restore original image data from reduced image data. An input unit inputs block data of 2×2 pixels from original image data. A converter generates reduced image data having a size smaller than the original image data by sampling one pixel data at a preset position in the input block data. A generator generates encoded data to restore three non-sampling target pixel data in each block data so as to restore the original image data from the reduced image data generated by the resolution converter. To do this, the generator determines whether all non-sampling target pixels in a block of interest are restorable from a sampling target pixel in the block of interest or from sampling target pixels in three blocks adjacent to the block of interest, and generates and outputs three kinds of additional information based on the determination result.
摘要翻译：本发明生成有效的编码数据，以从减少的图像数据恢复原始图像数据。输入单元从原始图像数据输入2×2像素的块数据。 A转换器通过在输入块数据中的预设位置处采样一个像素数据来生成尺寸小于原始图像数据的缩小图像数据。发生器产生编码数据以恢复每个块数据中的三个非采样目标像素数据，以便从分辨率转换器产生的缩小图像数据恢复原始图像数据。为此，发生器确定感兴趣块中的所有非采样目标像素是否可以从感兴趣块中的采样目标像素或与感兴趣块相邻的三个块中的采样目标像素恢复，并且生成并输出基于确定结果的三种附加信息。

6. 发明授权

US08331705B2 Image encoding apparatus and method of controlling the same 有权
标题翻译：图像编码装置及其控制方法
公开(公告)号：US08331705B2
公开(公告)日：2012-12-11
申请号：US12620194
申请日：2009-11-17
申请人： Yuki Shiraishi , Hiroshi Kajiwara , Naoki Ito , Hirokazu Tamura
发明人： Yuki Shiraishi , Hiroshi Kajiwara , Naoki Ito , Hirokazu Tamura
IPC分类号： G06K9/36
CPC分类号： H04N1/41 , H04N19/105 , H04N19/132 , H04N19/136 , H04N19/176 , H04N19/70
摘要： This invention generates efficient encoded data to restore original image data from reduced image data. An input unit inputs block data of 2×2 pixels from original image data. A converter generates reduced image data having a size smaller than the original image data by sampling one pixel data at a preset position in the input block data. A generator generates encoded data to restore three non-sampling target pixel data in each block data so as to restore the original image data from the reduced image data generated by the resolution converter. To do this, the generator determines whether all non-sampling target pixels in a block of interest are restorable from a sampling target pixel in the block of interest or from sampling target pixels in three blocks adjacent to the block of interest, and generates and outputs three kinds of additional information based on the determination result.
摘要翻译：本发明生成有效的编码数据，以从减少的图像数据恢复原始图像数据。输入单元从原始图像数据输入2×2像素的块数据。 A转换器通过在输入块数据中的预设位置处采样一个像素数据来生成尺寸小于原始图像数据的缩小图像数据。发生器产生编码数据以恢复每个块数据中的三个非采样目标像素数据，以便从分辨率转换器产生的缩小图像数据恢复原始图像数据。为此，发生器确定感兴趣块中的所有非采样目标像素是否可以从感兴趣块中的采样目标像素或与感兴趣块相邻的三个块中的采样目标像素恢复，并且生成并输出基于确定结果的三种附加信息。

7. 发明申请

US20060210176A1 Image encoding apparatus, image decoding apparatus, control method therefor, computer program, and computer-readable storage medium 有权
标题翻译：图像编码装置，图像解码装置，其控制方法，计算机程序和计算机可读存储介质
公开(公告)号：US20060210176A1
公开(公告)日：2006-09-21
申请号：US11366666
申请日：2006-03-03
申请人： Hiroshi Kajiwara , Yuki Matsumoto
发明人： Hiroshi Kajiwara , Yuki Matsumoto
IPC分类号： G06K9/36 , G06K9/46
CPC分类号： H04N19/105 , H04N19/136 , H04N19/182 , H04N19/186 , H04N19/50
摘要： According to this invention, while the encoding efficiency of image data (e.g., a natural image) substantially maintains the conventional one, an image (e.g., a CG image or text document) having a small number of appearance colors is losslessly encoded at higher compression ratio. For this purpose, pixel data are input in the raster order and temporarily stored in a buffer. Pixel data at positions having undergone encoding are stored. A neighborhood matching determination unit generates first information representing whether a pixel having the same color as that of the pixel of interest exists in neighboring pixels a, b, and c, and second information for specifying whether a pixel having the same color as that of the pixel of interest exists, and if the pixel having the same color exists, specifying the neighboring pixel. A pixel matching detection unit counts the number of colors contained in the neighboring pixels a, b, and c, and generates information representing whether the number of colors is two or less, or three or less. On the basis of the first information and second information, a code generation unit outputs one or both of encoded data from a matched-pixel position encoding unit and prediction error encoding unit.
摘要翻译：根据本发明，虽然图像数据（例如，自然图像）的编码效率基本保持常规图像，但是具有少量外观颜色的图像（例如，CG图像或文本文档）在较高压缩下被无损编码比。为此，以光栅顺序输入像素数据并临时存储在缓冲器中。存储经过编码的位置处的像素数据。邻域匹配确定单元产生表示在相邻像素 a，b和c中是否存在与感兴趣像素的颜色相同的颜色的像素的第一信息，以及用于指定像素具有与感兴趣像素的颜色相同的颜色，并且如果存在具有相同颜色的像素，则指定相邻像素。像素匹配检测单元对相邻像素 a，b和c中包含的颜色数进行计数，并生成表示颜色数是2以下，还是3以下的信息。基于第一信息和第二信息，代码生成单元从匹配像素位置编码单元和预测误差编码单元输出编码数据中的一个或两个。

8. 发明申请

US20050249283A1 Image coding apparatus and image decoding apparatus and their control methods, and computer program and computer-readable storage medium 有权
标题翻译：图像编码装置和图像解码装置及其控制方法，以及计算机程序和计算机可读存储介质
公开(公告)号：US20050249283A1
公开(公告)日：2005-11-10
申请号：US11119920
申请日：2005-05-03
申请人： Hiroshi Kajiwara , Yuki Matsumoto
发明人： Hiroshi Kajiwara , Yuki Matsumoto
IPC分类号： H03M7/36 , H04N1/413 , H04N1/417 , H04N7/12 , H04N19/103 , H04N19/137 , H04N19/167 , H04N19/194 , H04N19/50 , H04N19/61 , H04N19/625 , H04N19/63 , H04N19/91 , H04N19/93
CPC分类号： H04N19/39 , H04N19/13 , H04N19/15
摘要： An image coding apparatus for efficient coding on image data having discrete pixel values such as a CG image or a limited color image as well as a natural image where pixel value changes are mild. For this purpose, a tile dividing unit divides multi-valued image data into tiles. An occurred level count unit outputs the result of counting of the number of brightness values in the tile to a comparison unit and outputs the existing brightness values to an index table generation unit. The index table generation unit allocates continuous index values to the existing brightness values, and stores the result of allocation into an index memory table. An index conversion unit replaces the input pixel values in the tile with index values, and outputs the index values to a selector. The selector selects one of the brightness values in the tile or the index values based on the result of comparison by the comparison unit, and outputs the selected values to a tile data predictive coding unit so as to perform predictive coding processing.
摘要翻译：用于对具有诸如CG图像或有限彩色图像的离散像素值以及像素值改变的自然图像的图像数据进行有效编码的图像编码装置是温和的。为此，瓦片分割单元将多值图像数据分割成瓦片。发生的电平计数单元将瓦片中的亮度值的计数结果输出到比较单元，并将现有亮度值输出到索引表生成单元。索引表生成单元将连续的索引值分配给现有的亮度值，并将分配结果存储到索引存储器表中。索引转换单元用索引值替换瓦片中的输入像素值，并将索引值输出到选择器。选择器基于比较单元的比较结果来选择瓦片中的亮度值或索引值中的一个，并将所选择的值输出到瓦片数据预测编码单元，以进行预测编码处理。

9. 发明授权

US07689048B2 Image encoding apparatus, method, and computer-readable storage medium for encoding a pixel value 有权
标题翻译：用于编码像素值的图像编码装置，方法和计算机可读存储介质
公开(公告)号：US07689048B2
公开(公告)日：2010-03-30
申请号：US11415079
申请日：2006-05-02
申请人： Yuki Matsumoto , Hiroshi Kajiwara
发明人： Yuki Matsumoto , Hiroshi Kajiwara
IPC分类号： G06K9/36
CPC分类号： H04N19/93 , H04N19/593
摘要： Image data is efficiently encoded using a predict coding unit and a run-length coding unit. The predict coding unit encodes a target pixel X on the basis of difference between the value of the target pixel and a predict value calculated from pixels neighboring the target pixel. The run-length coding unit starts the measuring the run when the number of colors contained in four pixels “a”, “b”, “c”, and “d” near the target pixel X is 1, and outputs encoded data of the run when the target pixel is different from an immediately preceding pixel “a”. Then, the predict coding unit starts the encoding. At this time, since the target pixel is different from the preceding pixel, the preceding pixel is excluded from references for generating the predict value. Instead of the preceding pixel, an pixel, which has been encoded, satisfying a specific condition is referred to.
摘要翻译：使用预测编码单元和游程长度编码单元有效地对图像数据进行编码。预测编码单元基于目标像素的值与由与目标像素相邻的像素计算的预测值之间的差来对目标像素X进行编码。当目标像素X附近的四个像素“a”，“b”，“c”和“d”中包含的颜色数为1时，游程长度编码单元开始测量运行，并输出当目标像素与先前的像素“a”不同时，运行。然后，预测编码单元开始编码。此时，由于目标像素与先前像素不同，所以前面的像素被排除在用于生成预测值的参考之外。代替前述像素，参考已经被编码的满足特定条件的像素。

10. 发明授权

US07650039B2 Image encoding apparatus, image decoding apparatus, control method therefor, computer program, and computer-readable storage medium 有权
标题翻译：图像编码装置，图像解码装置，其控制方法，计算机程序和计算机可读存储介质
公开(公告)号：US07650039B2
公开(公告)日：2010-01-19
申请号：US11366666
申请日：2006-03-03
申请人： Hiroshi Kajiwara , Yuki Matsumoto
发明人： Hiroshi Kajiwara , Yuki Matsumoto
IPC分类号： G06K9/46
CPC分类号： H04N19/105 , H04N19/136 , H04N19/182 , H04N19/186 , H04N19/50
摘要： An image having few colors can be losslessly encoded at a higher compression ratio. For this purpose, pixel data are input in raster order and temporarily stored in a buffer. A neighborhood matching determination unit generates first information representing whether a pixel having the same color as that of the pixel of interest exists in neighboring pixels and second information specifying whether a pixel having the same color as that of the pixel of interest exists, and if the pixel having the same color exists, specifying the neighboring pixel. A pixel matching detection unit counts the number of colors contained in the neighboring pixels and generates information representing whether the number of colors is two or less, or three or less. On the basis of the information, a code generation unit outputs one or both of encoded data from a matched-pixel position encoding unit and a prediction error encoding unit.
摘要翻译：具有较少颜色的图像可以以更高的压缩比进行无损编码。为此，以光栅顺序输入像素数据并临时存储在缓冲器中。存在邻域匹配确定单元产生表示在相邻像素中是否存在与感兴趣像素相同颜色的像素的第一信息，以及指定是否存在与感兴趣像素相同颜色的像素的第二信息，以及如果存在具有相同颜色的像素，指定相邻像素。像素匹配检测单元对相邻像素中包含的颜色数进行计数，并生成表示颜色数是2以下，或者是3以下的信息。基于该信息，代码生成单元从匹配像素位置编码单元和预测误差编码单元输出编码数据中的一个或两个。

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