公开(公告)号：US08155476B2

公开(公告)日：2012-04-10

申请号：US12132415

申请日：2008-06-03

申请人： Tadayoshi Nakayama

发明人： Tadayoshi Nakayama

IPC分类号： G06K9/40

CPC分类号： G06T5/002 ,  G06T5/10 ,  G06T5/50 ,  G06T2207/10121 ,  G06T2207/20016

摘要： An image processing apparatus includes a noise reduction unit configured to nonlinearly convert a signal obtained by subtracting a value of a subtraction image signal, which is read from a memory, from that of a current-frame image signal, to generate a noise-reduced signal by subtracting the nonlinearly converted signal from the current-frame image signal, and to store the noise-reduced signal in the memory, a read unit configured to read the subtraction image signal from the memory at a moment between a moment, at which the subtraction image signal read from the memory is stored in the memory, and a moment at which the subtraction image signal is read from the memory, and a generation unit configured to generate an image based on the subtraction image signal read by the read unit.

摘要翻译： 一种图像处理装置包括：噪声降低单元，被配置为将从存储器读取的减法图像信号的值从当前帧图像信号中减去得到的信号非线性地变换，以产生噪声降低信号 通过从当前帧图像信号中减去非线性转换的信号，并将减噪信号存储在存储器中，读取单元被配置为在减法之间的时刻从存储器读取减法图像信号 从存储器读取的图像信号被存储在存储器中，并且从存储器读取减法图像信号的时刻，以及生成单元，被配置为基于由读取单元读取的减影图像信号生成图像。

公开(公告)号：US07835582B2

公开(公告)日：2010-11-16

申请号：US11681002

申请日：2007-03-01

申请人： Tadayoshi Nakayama

发明人： Tadayoshi Nakayama

IPC分类号： G06K9/34 ,  G06K9/36 ,  G06K9/46

CPC分类号： H04N19/59 ,  H04N19/12 ,  H04N19/136 ,  H04N19/146 ,  H04N19/156 ,  H04N19/172 ,  H04N19/176 ,  H04N19/60

摘要： An apparatus and method generate encoded data including lossless- and lossy-encoded data together within a unit time period while fully using the lossy encoding processing capability, by appropriately setting a threshold associated with the number of tiles. To this end, an image encoding apparatus has a lossless encoding processing unit and a lossy encoding processing unit. The lossless encoding processing unit outputs one of lossless-encoded data and non-encoded data from a selection unit to a memory based on the attribute information for each tile. Every time the total data size of non-encoded data output from the selection unit exceeds a predetermined threshold, a resolution converting unit executes processing for decreasing the resolution of the non-encoded data in the memory. Upon completion of storage of data for one page in the memory, a lossy encoding unit begins to generate lossy-encoded data from the non-encoded data.

摘要翻译： 一种装置和方法通过适当地设置与瓦片数量相关联的阈值，在完全使用有损编码处理能力的情况下，在单位时间内生成包括无损和有损编码数据在内的编码数据。 为此，图像编码装置具有无损编码处理单元和有损编码处理单元。 无损编码处理单元基于每个瓦片的属性信息将无损编码数据和非编码数据之一从选择单元输出到存储器。 每当从选择单元输出的非编码数据的总数据大小超过预定阈值时，分辨率转换单元执行用于降低存储器中的非编码数据的分辨率的处理。 在完成对存储器中的一页的数据的存储完成时，有损编码单元开始从非编码数据生成有损编码的数据。

公开(公告)号：US07460729B2

公开(公告)日：2008-12-02

申请号：US10870974

申请日：2004-06-21

申请人： Tadayoshi Nakayama

发明人： Tadayoshi Nakayama

IPC分类号： G06K9/36 ,  G06K9/46

CPC分类号： G06F17/147 ,  H04N19/42 ,  H04N19/60

摘要： A data transform processing apparatus comprising a first lossless transform circuit to perform two step ladder operation processings of receiving unweighted normalized data then outputting weighted nonnormalized rotation-transformed data, and a second lossless transform circuit to perform two step ladder operation processings of receiving the weighted nonnormalized rotation-transformed data from the first lossless transform circuit then performing inverse weighting and outputting unweighted normalized rotation-transformed data, wherein the outputs from the first lossless transform circuit are interchanged and supplied to the second lossless transform circuit.

摘要翻译： 一种数据变换处理装置，包括：第一无损变换电路，用于执行接收未加权归一化数据然后输出加权非正常化旋转变换数据的两阶梯运算处理;以及第二无损变换电路，执行两个梯级运算处理，以接收加权非正则化 然后进行逆加权并输出未加权的归一化旋转变换数据，其中来自第一无损变换电路的输出互换并提供给第二无损变换电路。

公开(公告)号：US20080069464A1

公开(公告)日：2008-03-20

申请号：US11855440

申请日：2007-09-14

申请人： Tadayoshi Nakayama

发明人： Tadayoshi Nakayama

IPC分类号： G06K9/36

CPC分类号： H04N19/428 ,  H04N19/12 ,  H04N19/132 ,  H04N19/156 ,  H04N19/176 ,  H04N19/42 ,  H04N19/423 ,  H04N19/426 ,  H04N19/63

摘要： A lossless encoding processing unit lossless-encodes respective tiles, and stores the encoded data in a memory. A determination unit determines, according to attribute information of each tile, whether the tile of interest is to be lossless- or lossy-encoded, and appends the determination result at the head of lossless-encoded data as a flag. The determination unit counts, in variable CH, the number of tiles determined to be lossy-encoded, during the lossless encoding processing. Every time the CH exceeds one of a plurality of different thresholds, a lossy encoding processing unit decodes lossless-encoded data appended with a lossy flag, applies processing for decreasing the resolution to the decoded data, lossless-encodes the data that has undergone the processing again, and stores the lossless-encoded data in the memory. Upon completion of the lossless encoding processing for one page, the lossy encoding processing unit lossy-encodes the lossless-encoded data appended with the lossy flag.

摘要翻译： 无损编码处理单元对各个瓦片进行无损编码，并将编码数据存储在存储器中。 确定单元根据每个瓦片的属性信息确定感兴趣的瓦片是否是无损或有损编码的，并将确定结果附加在无损编码数据的头部作为标志。 在无损编码处理期间，确定单元在变量CH中对被确定为有损码的块的数量进行计数。 每当CH超过多个不同阈值中的一个时，有损编码处理单元解码附加有有损标志的无损编码数据，应用用于将分辨率降低到解码数据的处理，对经过处理的数据进行无损编码 并将无损编码的数据存储在存储器中。 一旦完成了对一页的无损编码处理，有损编码处理单元对附加有有损标志的无损编码数据进行有损编码。

公开(公告)号：US07284026B2

公开(公告)日：2007-10-16

申请号：US10603603

申请日：2003-06-26

申请人： Tadayoshi Nakayama

发明人： Tadayoshi Nakayama

IPC分类号： G06F17/14

CPC分类号： G06F17/145

摘要： Input signals are transformed with an Hadamard transformation matrix in each of the four four-point Hadamard transformation units, wherein a rounding unit rounds up the least significant bit of each of the odd number of coefficients and discards the least significant bit of each of the remaining odd number of coefficients among the four transformed coefficients output from each of the four-point Hadamard transformation units to produce four sets of four integer coefficients, and one integer coefficient is selected from each set, and four selected integer coefficients including odd number of rounded up are input to an Hadamard transformation unit and are Hadamard transformed, and the Hadamard transformed coefficients are rounded up to produce integer.

摘要翻译： 输入信号在四个四点Hadamard变换单元中的每一个中用Hadamard变换矩阵进行变换，其中舍入单元将奇数系数中的每一个的最低有效位四舍五入，并丢弃剩余的每一个的最低有效位 从四点Hadamard变换单元中的每一个输出的四个变换系数中的奇数个系数产生四组四个整数系数，并从每组中选择一个整数系数，并且四个选择的整数系数包括奇数个舍入 输入到Hadamard变换单元，并进行Hadamard变换，并将Hadamard变换后的系数舍入为整数。

公开(公告)号：US07188132B2

公开(公告)日：2007-03-06

申请号：US10322598

申请日：2002-12-19

申请人： Tadayoshi Nakayama

发明人： Tadayoshi Nakayama

IPC分类号： G06F7/14 ,  G06K9/36

CPC分类号： G06F17/145

摘要： The present invention provides a method and apparatus that transforms input signals X0, X1, X2, X3 using a 4-point Hadamard transform matrix, and of the resulting transformation data, rounds up the LSB of the first transformed data and rounds down the LSB of the remaining odd-numbered data. When restoring the data to its original state the rounding is executed after a Hadamard inverse transformation is performed, thereby restoring the data to its original state X0, X1, X2, X3.

摘要翻译： 本发明提供一种使用4点Hadamard变换矩阵来变换输入信号X 0，X 1，X 2，X 3的方法和装置，并且所得到的变换数据对第一变换数据的LSB进行舍入， 下降到剩余奇数数据的LSB。 当将数据恢复到原始状态时，在执行Hadamard逆变换之后执行舍入，从而将数据恢复到其原始状态X 0，X 1，X 2，X 3。

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：US20060039626A1

公开(公告)日：2006-02-23

申请号：US11205052

申请日：2005-08-17

申请人： Tadayoshi Nakayama

发明人： Tadayoshi Nakayama

IPC分类号： G06K9/36

CPC分类号： G06F17/147

摘要： The present invention performs a lossless four-point orthogonal transformation with reduced rounding errors using a simple configuration. It provides a data transformation apparatus which receives four items of vector data X0, X1, X2, and X3 expressed in terms of integers and obtains transformed data expressed in terms of integers by application of a coefficient “a” that is an odd number larger than 1 using a matrix operation: ( Y 0 Y 1 Y 2 Y 3 ) = 1 1 + a 2 ⁢ ( 1 a a a 2 a - 1 a 2 - a a a 2 - 1 - a a 2 - a - a 1 ) ⁢ ( X 0 X 1 X 2 X 3 ) First, the data transformation apparatus determines D0 to D3 (assuming a=3): D0=X0+3X1+3X2+9X3 D1=3X0−X1+9X2−3X3 D2=3X0+9X1−X2−3X3 D3=9X0−3X1−3X2+X3 Next, it determines E1 by adding integer data smaller than half a divisor {1+a2} to D1 and determines correction data E0, E2, and E4 by adding a value equal to half the divisor to the rest of the data D0, D2, and D3. Next, it divides E0 to E4 by the divisor and outputs resulting data Y0, Y1, Y2, and Y3.

公开(公告)号：US20050276501A1

公开(公告)日：2005-12-15

申请号：US11152053

申请日：2005-06-15

申请人： Tadayoshi Nakayama ,  Hiroki Kishi

发明人： Tadayoshi Nakayama ,  Hiroki Kishi

IPC分类号： G06K9/36 ,  H04N7/26 ,  H04N7/30

CPC分类号： H04N19/184 ,  H04N19/126 ,  H04N19/132 ,  H04N19/60

摘要： This invention improves the arithmetic precision even for image data in which each component of one pixel is expressed by 8 bits by fully utilizing the 12-bit data processing performance of an Extended sequential DCT-based JPEG decoding/encoding apparatus, so that image deterioration due to JPEG compression which is observed in an image portion where the gray levels change slowly, i.e., a pseudo edge can be hardly generated, thus improving the image quality. To this end, a header interpreter interprets the header of encoded data to be decoded to determine if the encoded data is that of 8-bit image data per component or that of 12-bit image data per component, and outputs the result to a bit shift unit, rounding processor, and inverse quantizer. Upon reception of a message indicating that the encoded data is that of 8-bit color image data per component, the bit shift unit stores a result obtained by shifting a quantization step of a quantization table stored in the header by 4 bits in the MSB direction in a quantization table storage unit. The inverse quantizer multiplies a decoded value decoded by a Huffman decoder by the quantization step stored in the quantization table storage unit to generate 12-bit DCT coefficients. The DCT coefficients are processed by an IDCT unit to obtain image data, and the image data is rounded to 8 bits again, thus outputting image data as a decoded result.

摘要翻译： 本发明通过充分利用基于扩展顺序DCT的JPEG解码/编码装置的12位数据处理性能，即使对于一个像素的每个分量由8位表示的图像数据也提高了算术精度，使得图像劣化 到在灰度级变化缓慢的图像部分中观察到的JPEG压缩，即，几乎不能产生伪边缘，从而提高图像质量。 为此，报头解释器解释要解码的编码数据的标题，以确定编码数据是每个分量的8位图像数据还是每个分量的12位图像数据的编码数据，并将结果输出到位 移位单元，舍入处理器和逆量化器。 在接收到指示编码数据是每个分量的8位彩色图像数据的消息的消息时，位移单元将通过将存储在报头中的量化表的量化步长移位4位的结果而获得的结果在MSB方向 在量化表存储单元中。 逆量化器将由霍夫曼解码器解码的解码值乘以存储在量化表存储单元中的量化步长，生成12位DCT系数。 DCT系数由IDCT单元处理以获得图像数据，并且图像数据再次舍入为8位，从而输出图像数据作为解码结果。