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1.发明公开System and method for suppressing blocking artifacts in decoded transform coded images 失效用于在解码变换编码图像中抑制阻塞装置的系统和方法
公开(公告)号：EP0585573A3
公开(公告)日：1994-07-13
申请号：EP93111201.5
申请日：1993-07-13
摘要： A system and method for image processing is disclosed wherein blocking artifacts are decreased or removed in regions of slowly varying intensity, i.e., low activity, in an image reproduction decoded from a transform coded image representation. The de-blocking procedure may be applied to JPEG DCT-based decoded images, and AC prediction is done selectively only in regions of low activity and only if the AC prediction is consistent with known decoded AC coefficient values of lower precision than the predicted values.
摘要翻译： 公开了一种用于图像处理的系统和方法，其中在从变换编码图像表示解码的图像再现中，在缓慢变化的强度（即，低活动性）的区域中减少或去除块伪影。 解块过程可以应用于基于JPEG DCT的解码图像，并且AC预测仅在低活动性的区域中进行，并且仅当AC预测与比预测值更低精度的已知解码的AC系数值一致时才完成。
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2.发明公开System and method for suppressing blocking artifacts in decoded transform coded images 失效System and Verfahren zurUnterdrückungder Blockstrukturen in dekodierten transformationationskodierten Bildern。
公开(公告)号：EP0585573A2
公开(公告)日：1994-03-09
申请号：EP93111201.5
申请日：1993-07-13
摘要： A system and method for image processing is disclosed wherein blocking artifacts are decreased or removed in regions of slowly varying intensity, i.e., low activity, in an image reproduction decoded from a transform coded image representation. The de-blocking procedure may be applied to JPEG DCT-based decoded images, and AC prediction is done selectively only in regions of low activity and only if the AC prediction is consistent with known decoded AC coefficient values of lower precision than the predicted values.
摘要翻译： 公开了一种用于图像处理的系统和方法，其中在从变换编码图像表示解码的图像再现中，在缓慢变化的强度（即，低活动性）的区域中减少或去除块伪影。 解块过程可以应用于基于JPEG DCT的解码图像，并且AC预测仅在低活动性的区域中进行，并且仅当AC预测与比预测值更低精度的已知解码的AC系数值一致时才完成。
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3.发明公开System for creating transposed image data from a run end or run length representation of an image 失效从图像的运行结束或运行长度表示创建传输的图像数据的系统
公开(公告)号：EP0279420A3
公开(公告)日：1988-12-07
申请号：EP88102277
申请日：1988-02-17
IPC分类号： H04N01/387 , H04N01/413 , H04N01/40
CPC分类号： G06T3/60
摘要： A system for formatting electronic binary image data, which may be in compressed raster form, into transposed or rotated raster form for storage or output, such as on a printing device, is disclosed wherein the image data is first assembled in a buffer in the form of vectors of run ends representing successive raster scan lines of an original image to be reproduced. The elements of an intermediate buffer are initialized to zero and the data is entered into the intermediate buffer by using each run end to set a bit in the intermediate buffer, with the bits being set in the buffer elements in correspondence with the respective raster positions of the run ends. The elements of the intermediate buffer containing the entered electronic data are then combined, such as by EXCLUSIVE-ORing, to create transposed or rotated raster data, which may stored or input to a suitable output device, such as a printer or display. The raster data may be compressed in the process and other processes, such as image reversal, may be carried out with facility.
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公开(公告)号：EP0448802A3
公开(公告)日：1992-01-08
申请号：EP90124057.2
申请日：1990-12-13
IPC分类号： H03M7/40
CPC分类号： H03M7/4006 , H03M7/48
摘要： A system and method for maximizing data compression by optimizing model selection during coding of an input stream of data symbols, wherein at least two models are run and compared, and the model with the best coding performance for a given-size segment or block of compressed data is selected such that only its block is used in an output data stream. The best performance is determined by 1) respectively producing comparable-size blocks of compressed data from the input stream with the use of the two, or more, models and 2) selecting the model which compresses the most input data. In the preferred embodiment, respective strings of data are produced with each model from the symbol data and are coded with an adaptive arithmetic coder into the compressed data. Each block of compressed data is started by coding the decision to use the model currently being run and all models start with the arithmetic coder parameters established at the end of the preceding block. Only the compressed code stream of the best model is used in the output and that code stream has in it the overhead for selection of that model. Since the decision as to which model to run is made in the compressed data domain, i.e., the best model is chosen on the basis of which model coded the most input symbols for a given-size compressed block, rather than after coding a given number of input symbols, the model selection decision overhead scales with the compressed data. Successively selected compressed blocks are combined as an output code stream to produce an optimum output of compressed data, from input symbols, for storage or transmission.
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6.发明授权Method and apparatus for creating transposed image data from a run end or run length representation of an image 失效从图像的运行结束或运行长度表示创建传输图像数据的方法和装置
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7.发明公开Method and apparatus for creating transposed image data from a run end or run length representation of an image 失效方法和用于从一个“运行结束”准备调换的图像数据装置 - 或“游程长度” -Bilddarstellung。
公开(公告)号：EP0279420A2
公开(公告)日：1988-08-24
申请号：EP88102277.6
申请日：1988-02-17
CPC分类号： G06T3/60
摘要： A system for formatting electronic binary image data, which may be in compressed raster form, into transposed or rotated raster form for storage or output, such as on a printing device, is disclosed wherein the image data is first assembled in a buffer in the form of vectors of run ends representing successive raster scan lines of an original image to be reproduced. The elements of an intermediate buffer are initialized to zero and the data is entered into the intermediate buffer by using each run end to set a bit in the intermediate buffer, with the bits being set in the buffer elements in correspondence with the respective raster positions of the run ends. The elements of the intermediate buffer containing the entered electronic data are then combined, such as by EXCLUSIVE-ORing, to create transposed or rotated raster data, which may stored or input to a suitable output device, such as a printer or display. The raster data may be compressed in the process and other processes, such as image reversal, may be carried out with facility.
摘要翻译： 一种用于格式化电子二进制图象数据，其可以是压缩的光栅形式，到转置或用于储存或输出，彩色旋转的光栅形式的系统：游离缺失worin的图像数据，诸如打印装置上时，盘首先在缓冲器组装在形式 表示原始图像的连续光栅扫描线运行结束的矢量将被再现。 中间缓冲器中的元素是通过使用每个运行端设置在中间缓冲器中的位初始化为零，并且所述数据被输入到中间缓冲器，与所述位在缓冲元件被设置在对应于的respectivement网格位置 运行结束。 然后将含有已输入电子数据的中间缓冲器中的元素进行组合，：例如通过异或运算，来创建转或旋转的光栅数据，其可以或存储的输入到适当的输出设备，颜色：诸如打印机或显示器。 光栅数据可以在处理和其它处理被压缩，谋求作为图像反转，可以与设施内进行。
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8.发明公开Dynamic model selection during data compression 失效Dynamische Modelselektionwährendeiner Datenkompression。
公开(公告)号：EP0448802A2
公开(公告)日：1991-10-02
申请号：EP90124057.2
申请日：1990-12-13
IPC分类号： H03M7/40
CPC分类号： H03M7/4006 , H03M7/48
摘要： A system and method for maximizing data compression by optimizing model selection during coding of an input stream of data symbols, wherein at least two models are run and compared, and the model with the best coding performance for a given-size segment or block of compressed data is selected such that only its block is used in an output data stream. The best performance is determined by 1) respectively producing comparable-size blocks of compressed data from the input stream with the use of the two, or more, models and 2) selecting the model which compresses the most input data. In the preferred embodiment, respective strings of data are produced with each model from the symbol data and are coded with an adaptive arithmetic coder into the compressed data. Each block of compressed data is started by coding the decision to use the model currently being run and all models start with the arithmetic coder parameters established at the end of the preceding block. Only the compressed code stream of the best model is used in the output and that code stream has in it the overhead for selection of that model. Since the decision as to which model to run is made in the compressed data domain, i.e., the best model is chosen on the basis of which model coded the most input symbols for a given-size compressed block, rather than after coding a given number of input symbols, the model selection decision overhead scales with the compressed data. Successively selected compressed blocks are combined as an output code stream to produce an optimum output of compressed data, from input symbols, for storage or transmission.
摘要翻译： 一种用于通过在数据符号的输入流的编码期间优化模型选择来最大化数据压缩的系统和方法，其中运行和比较至少两个模型，以及对于给定尺寸的段或压缩块的编码性能最佳的模型 选择数据使得仅在其输出数据流中使用其块。 最佳性能由1）分别使用两个或多个模型分别产生来自输入流的压缩数据的相当大小的块，以及2）选择压缩最多输入数据的模型。 在优选实施例中，使用符号数据的每个模型生成各个数据串，并且用自适应算术编码器编码成压缩数据。 通过对使用当前正在运行的模型的决定进行编码来开始每个压缩数据块，并且所有模型从在前一块结束处建立的算术编码器参数开始。 在输出中只使用最佳模型的压缩代码流，并且代码流在其中具有用于选择该模型的开销。 由于在压缩数据域中作出关于要运行的模型的决定，即基于哪个模型编码给定尺寸压缩块的最多输入符号而不是在给定数量的编码之后选择最佳模型 的输入符号，模型选择决定开销用压缩数据进行缩放。 连续选择的压缩块被组合为输出码流，以从输入符号产生用于存储或传输的压缩数据的最佳输出。
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公开(公告)号：EP0224753A3
公开(公告)日：1990-03-14
申请号：EP86115453.2
申请日：1986-11-07
CPC分类号： H03M7/4006
摘要： The present invention relates to computer apparatus and methodology for adapting the value of a probability of the occurrence of a first of two binary symbols which includes (a) maintaining a count of the number k of occurrences of the first symbol; (b) maintaining a total count of the number n of occurrences of all symbols; (c) selecting confidence limits for the probability; and (d) when the probability is outside the confidence limits, effectuating a revision in the value of the probability directed toward restoring confidence in the probability value. The number of allowed probabilities is, optionally, less than the total number of the possible probabilities given the probability precision. Moreover, an approximation is employed which limits the number of probabilities to which a current probability can be changed, thereby enabling the probability adaptation to be implemented as a deterministic finite state machine.
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10.发明公开Probability adaptation for arithmetic coders 失效Wahrscheinlichkeitsanpassungfürarithmetische Codierer。
公开(公告)号：EP0224753A2
公开(公告)日：1987-06-10
申请号：EP86115453.2
申请日：1986-11-07
CPC分类号： H03M7/4006
摘要： The present invention relates to computer apparatus and methodology for adapting the value of a probability of the occurrence of a first of two binary symbols which includes (a) maintaining a count of the number k of occurrences of the first symbol; (b) maintaining a total count of the number n of occurrences of all symbols; (c) selecting confidence limits for the probability; and (d) when the probability is outside the confidence limits, effectuating a revision in the value of the probability directed toward restoring confidence in the probability value. The number of allowed probabilities is, optionally, less than the total number of the possible probabilities given the probability precision. Moreover, an approximation is employed which limits the number of probabilities to which a current probability can be changed, thereby enabling the probability adaptation to be implemented as a deterministic finite state machine.
摘要翻译： 本发明涉及用于调整两个二进制符号中的第一个符号的出现概率的值的计算机装置和方法，其包括：（a）保持第一符号的出现次数k的计数; （b）维持所有符号出现次数n的总计数; （c）选择概率的置信限; 和（d）当概率超出置信限度时，对在概率值恢复置信度的概率值进行修正。 可允许概率的数量可选地小于给定概率精度的可能概率的总数。 此外，采用近似来限制可以改变当前概率的概率的数量，从而使概率适配能够被实现为确定性有限状态机。
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