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1.发明授权公开(公告)号：US06556707B1
公开(公告)日：2003-04-29
申请号：US09330007
申请日：1999-06-11
申请人： Takahiro Yagishita , Yukiko Yamazaki , Nekka Matsuura , Hiromi Okubo , Hiroyuki Shibaki , Hiroshi Ishii
发明人： Takahiro Yagishita , Yukiko Yamazaki , Nekka Matsuura , Hiromi Okubo , Hiroyuki Shibaki , Hiroshi Ishii
IPC分类号： G06K900
CPC分类号： H04N1/40012
摘要： An image processing apparatus includes a converter, a calculator and a reverse converter. The converter performs a frequency conversion operation on a color image signal which includes a brightness signal and color signals and divides values of each of the brightness signal and the color signals into high frequency coefficients and a low frequency coefficient. The calculator calculates the high frequency coefficients of the brightness signal and the color signals, generates a set of different high frequency coefficients, and produces a new brightness signal by adding the low frequency coefficient of the brightness signal to the set of different high frequency coefficients. The reverse converter performs a reverse frequency conversion operation on the new brightness signal.
摘要翻译： 图像处理装置包括转换器，计算器和反向转换器。 转换器对包括亮度信号和彩色信号的彩色图像信号执行频率转换操作，并且将每个亮度信号和颜色信号的值分成高频系数和低频系数。 计算器计算亮度信号和彩色信号的高频系数，产生一组不同的高频系数，并通过将亮度信号的低频系数加到不同高频系数的集合中，产生新的亮度信号。 反向转换器对新的亮度信号执行反向频率转换操作。
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公开(公告)号：US06985634B2
公开(公告)日：2006-01-10
申请号：US10730019
申请日：2003-12-09
IPC分类号： G06K9/36
摘要： An image processing system which compresses an image including both a binary image and a continuous tone image by a sub-band transform method with a high compression rate. A 2×2 pixel matrix block is extracted from image data. A transform factor having a plurality of frequency components is obtained from the 2×2 pixel matrix block data. The transform factor is quantized by a fixed-length quantizing method by deleting a predetermined number of lower order bits of each of the frequency components.
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公开(公告)号：US06714685B2
公开(公告)日：2004-03-30
申请号：US10423911
申请日：2003-04-28
IPC分类号： G06K946
摘要： An image processing system which compresses an image including both a binary image and a continuous tone image by a sub-band transform method with a high compression rate. A 2×2 pixel matrix block is extracted from image data. A transform factor having a plurality of frequency components is obtained from the 2×2 pixel matrix block data. The transform factor is quantized by a fixed-length quantizing method by deleting a predetermined number of lower order bits of each of the frequency components.
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公开(公告)号：US06704455B1
公开(公告)日：2004-03-09
申请号：US09085714
申请日：1998-05-28
IPC分类号： G06K936
CPC分类号： G06T9/005
摘要： A dividing portion divides input image data into a plurality of block data, a block expressed by each of said plurality of block data comprising a pixel matrix of the same predetermined size. A transform portion transforms each of the plurality of block data by a frequency transform method so as to produce a transform factor. A quantizing portion, having a plurality of quantization tables, quantizes the transform factor using one of the plurality of quantization tables. An encoding portion encodes an output of the quantizing portion. A reverse transform portion restores image data from the output of the quantizing portion. A measuring portion measures an error between the input image data and the image data restored by the reverse transform portion. The quantizing portion quantizes the transform factor again using another one of the plurality of quantization tables when the error measured by the measuring portion exceeds a predetermined threshold value.
摘要翻译： 分割部将输入图像数据分割为多个块数据，由包含相同预定尺寸的像素矩阵的所述多个块数据中的每一个表示的块。 变换部分通过频率变换方法来变换多个块数据中的每一个，以产生变换因子。 具有多个量化表的量化部分使用多个量化表之一量化变换因子。 编码部分对量化部分的输出进行编码。 反向变换部分从量化部分的输出恢复图像数据。 测量部分测量输入图像数据与由反向变换部分恢复的图像数据之间的误差。 当由测量部分测量的误差超过预定阈值时，量化部分再次使用多个量化表中的另一个量化该变换因子。
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5.发明授权Image processing method and apparatus to select a data compression method according to a size of an output image 失效根据输出图像的尺寸选择数据压缩方法的图像处理方法和装置公开(公告)号：US06519052B1
公开(公告)日：2003-02-11
申请号：US09401503
申请日：1999-09-22
IPC分类号： G06E1500
CPC分类号： G06T9/00
摘要： An image processing apparatus for inputting image data from an external image input device and outputting the inputted image data to an external image output device after processing the data, the image processing apparatus including a data compression device for compressing the inputted image data by a variable-length data compression method. An image data storing device stores the inputted image data therein. A control device controls the apparatus, such that, when a size of an output image of the inputted image data is larger than a predetermined size, the data compression device compresses the inputted image data by the variable-length data compression method and the image data storing device stores the compressed image data therein, and, when the output image of the inputted image data is equal to or smaller than the predetermined size, the image data storing device stores the inputted image data therein without data compression.
摘要翻译： 一种用于从外部图像输入装置输入图像数据并在处理数据之后将输入的图像数据输出到外部图像输出装置的图像处理装置，所述图像处理装置包括：数据压缩装置，用于通过可变尺寸压缩输入的图像数据; 长度数据压缩方法。 图像数据存储装置将输入的图像数据存储在其中。 控制装置控制装置，使得当输入图像数据的输出图像的尺寸大于预定尺寸时，数据压缩装置通过可变长度数据压缩方法和图像数据来压缩输入的图像数据 存储装置将压缩图像数据存储在其中，并且当输入的图像数据的输出图像等于或小于预定尺寸时，图像数据存储装置在其中存储输入的图像数据而不进行数据压缩。
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公开(公告)号：US07046387B1
公开(公告)日：2006-05-16
申请号：US09664832
申请日：2000-09-19
IPC分类号： G06K15/00
CPC分类号： H04N11/042 , H04N19/12 , H04N19/172 , H04N19/186 , H04N19/60 , H04N19/63
摘要： A device for processing images includes a compressing/coding unit which encodes image data including a plurality of color components to produce fixed-length codes, a memory unit which stores therein the codes produced by the compressing/coding unit, a distribution-measurement unit which measures a distribution of the color components concurrently with the encoding of the image data performed by the compressing/coding unit, and a memory-control unit which releases a memory space assigned to part of the codes relating to colors in the memory unit if the distribution-measurement unit detects that the distribution concentrates on a particular color composition, and records data indicative of the particular color composition in the memory unit.
摘要翻译： 一种用于处理图像的装置包括：压缩/编码单元，对压缩/编码单元产生的代码编码包含多个颜色分量的图像数据以产生固定长度代码;存储单元，分配测量单元， 测量与由压缩/编码单元执行的图像数据的编码同时的颜色分量的分布;以及存储器控制单元，其释放分配给与存储单元中的颜色相关的代码的一部分的存储空间，如果分布 测量单元检测到分布集中于特定的颜色组合，并且将表示特定颜色组成的数据记录在存储单元中。
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7.发明授权Coding apparatus, decoding apparatus, coding method, decoding method, amd computer-readable recording medium for executing the methods 失效编码装置，解码装置，编码方法，解码方法，用于执行方法的计算机可读记录介质公开(公告)号：US06788811B1
公开(公告)日：2004-09-07
申请号：US09565545
申请日：2000-05-05
IPC分类号： G06K936
CPC分类号： H04N19/60 , H04N11/044 , H04N19/63
摘要： A coding apparatus which can simplify a coding circuit and also simplify the processing of quantization. Image data that consists of R-, G-, and B-color components read from a scanner into buffers is subjected to transformation using a position correlation for each of RGB in position-correlation transformation sections. The DC component of each of the components is then color-converted in a color conversion section to be a DC lightness signal and DC color signals, and the signals are quantized in a quantization section and a coding section. Whereas, the AC components of each of the components are subjected to quantization in a first step in an AC component quantization section, and further to color conversion in a color conversion section to be an AC lightness signal and AC color signals. The signals are quantized in a second step in a quantization section and a coding section.
摘要翻译： 一种可以简化编码电路并简化量化处理的编码装置。 由从扫描仪读取到缓冲器中的R，G和B颜色分量的图像数据使用位置相关变换部分中的每个RGB的位置相关性进行变换。 然后，将颜色转换部分中的每个分量的直流分量进行颜色转换为直流亮度信号和直流彩色信号，并且在量化部分和编码部分对信号进行量化。 而在AC分量量化部分中的每个分量的AC分量在第一步进行量化，并且进一步将颜色转换部分中的颜色转换为AC亮度信号和AC彩色信号。 在量化部分和编码部分中的第二步中量化信号。
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公开(公告)号：US06459816B2
公开(公告)日：2002-10-01
申请号：US09073873
申请日：1998-05-07
IPC分类号： G06K946
摘要： An image processing system which compresses an image including both a binary image and a continuous tone image by a sub-band transform method with a high compression rate. A 2×2 pixel matrix block is extracted from image data. A transform factor having a plurality of frequency components is obtained from the 2×2 pixel matrix block data. The transform factor is quantized by a fixed-length quantizing method by deleting a predetermined number of lower order bits of each of the frequency components.
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公开(公告)号：US06603884B2
公开(公告)日：2003-08-05
申请号：US10175837
申请日：2002-06-21
IPC分类号： G06K936
摘要： An image processing system which compresses an image including both a binary image and a continuous tone image by a sub-band transform method with a high compression rate. A 2×2 pixel matrix block is extracted from image data. A transform factor having a plurality of frequency components is obtained from the 2×2 pixel matrix block data. The transform factor is quantized by a fixed-length quantizing method by deleting a predetermined number of lower order bits of each of the frequency components.
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公开(公告)号：US06507674B1
公开(公告)日：2003-01-14
申请号：US09455923
申请日：1999-12-07
申请人： Takahiro Yagishita , Nekka Matsuura
发明人： Takahiro Yagishita , Nekka Matsuura
IPC分类号： G06K936
摘要： An image data encoding apparatus includes a wavelet transform unit which produces a first subband coefficient and a second subband coefficient as an output in response to each of blocks of the input image data, the first and second subband coefficients being produced by performing a multiple decomposition process in which only the first subband coefficient is further decomposed. A first text transform unit produces an intensity coefficient of a first kind as well as a set of coefficients of a second kind as an output in response to each block, the intensity coefficient including significant bits, and only the intensity coefficient being further decomposed in the first text transform unit. A second text transform unit produces a set of coefficients of the second kind as an output in response to each block, one of the coefficients of the second kind including significant bits but not being further decomposed. A selector selects one of the output of the wavelet transform unit, the output of the first text transform unit and the output of the second text transform unit, as an input to an entropy coder, in accordance with a combination of an area-discriminating signal and a text-transform control signal.
摘要翻译： 图像数据编码装置包括小波变换单元，该小波变换单元响应于输入图像数据的每个块产生第一子带系数和第二子带系数作为输出，通过执行多重分解处理产生第一和第二子带系数 其中仅第一子带系数进一步分解。 第一文本变换单元响应于每个块产生第一类的强度系数以及第二类的系数集合作为输出，强度系数包括有效位，并且仅强度系数进一步分解为 第一文本变换单元。 第二文本变换单元响应于每个块产生第二类的一系列系数作为输出，第二类的系数之一包括有效位，但不进一步分解。 选择器根据区域识别信号的组合来选择小波变换单元的输出中的一个，第一文本变换单元的输出和第二文本变换单元的输出作为熵编码器的输入 和文本变换控制信号。
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