-
公开(公告)号：EP0517834B1
公开(公告)日：1998-09-16
申请号：EP91906206.7
申请日：1991-02-26
发明人： LEE, Chong, U.
CPC分类号： H04N19/00 , G06T9/40 , H04N19/119 , H04N19/129 , H04N19/13 , H04N19/146 , H04N19/15 , H04N19/154 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/60 , H04N19/91 , H04N19/96 , H04N19/98
-
公开(公告)号：EP0785669A3
公开(公告)日：1998-03-04
申请号：EP97200734.8
申请日：1991-12-17
摘要： Method and apparatus for efficiently encoding image data of a color facsimile or the like are provided. A specific color judgment unit discriminates a specific color portion such as white or blank portion of the image data inputted from an image input unit. An orthogonal transforming process is not executed to the blank block, thereby raising an encoding efficiency. A discrimination signal is subjected to a dynamic arithmetical encoding, thereby producing code data.
摘要翻译： 提供了用于有效编码彩色传真等的图像数据的方法和装置。 特定颜色判断单元区分从图像输入单元输入的图像数据的特定颜色部分，例如白色或空白部分。 不对空白块执行正交变换处理，由此提高编码效率。 鉴别信号经过动态算术编码，由此产生码数据。
-
公开(公告)号：EP0491556A3
公开(公告)日：1992-11-04
申请号：EP91311717.2
申请日：1991-12-17
摘要： Method and apparatus for efficiently encoding image data of a color facsimile or the like are provided. A specific color judgment unit (4) discriminates a specific color portion such as white or blank portion of the image data inputted from an image input unit (1). An orthogonal transforming process (10) is not executed to the blank block, thereby raising an encoding efficiency. A discrimination signal is subjected to a dynamic arithmetical encoding (6), thereby producing code data.
-
公开(公告)号：EP0325373A3
公开(公告)日：1991-07-17
申请号：EP89300276.6
申请日：1989-01-12
申请人： AT&T Corp.
CPC分类号： H04N1/411
摘要： A high resolution image is decomposed to a basic lower resolution replica and a plurality of supplemental information fields for use in a progressive high resolution image facsimile transmission system. The basic lower resolution replica is generated by successive decompositions of the original image into a plurality of intermediate lower resolution replicas and corresponding supplemental information fields by employing a so-called edge decomposition technique. The supplemental information fields are required in a receiver to upgrade the basic lower resolution replica toward the original high resolution replica.
-
公开(公告)号：EP0202425B1
公开(公告)日：1991-05-22
申请号：EP86103848.7
申请日：1986-03-21
CPC分类号： H04N1/40062 , H04N1/4055
-
公开(公告)号：EP0396368A2
公开(公告)日：1990-11-07
申请号：EP90304677.9
申请日：1990-04-30
申请人： AT&T Corp.
CPC分类号： H04N1/4105 , H04N5/85 , H04N5/9261 , H04N19/102 , H04N19/13 , H04N19/61 , H04N19/63 , H04N19/94
摘要： An image-coding system reduces image data redundancies and perceptual irrelevancies through progressive sub-band coding. The image is separated into plurality of sub-bands ((0,0) to (3,3)). From this sub-band information, a perceptual metric, based on the properties of the sub-band filters, quantizer error distribution, and properties of the human visual system, is determined (28) which provides the maximum amount of coding noise that may be introduced to each pixel in every sub-band without causing perceptible degradation of the coded image. This perceptual metric is used to adjust the quantizer (25) used in encoding each sub-band signal. In addition, redundancy in the output of the quantizer is reduced using a multidimensional Huffman compression scheme (27).
摘要翻译： 图像编码系统通过逐行子带编码减少图像数据冗余和感知不相关。 图像被分成多个子带（（0,0）至（3,3））。 从该子带信息中，确定基于子带滤波器的属性，量化器误差分布和人类视觉系统的属性的感知度量（28），其提供可能是最大量的编码噪声 引入到每个子带中的每个像素，而不会导致编码图像的可察觉的劣化。 该感知度量用于调整在每个子带信号的编码中使用的量化器（25）。 另外，使用多维霍夫曼压缩方案（27）减少量化器的输出中的冗余。
-
公开(公告)号：EP0385421A3
公开(公告)日：1990-11-07
申请号：EP90103868.7
申请日：1990-02-28
发明人： Yoneda, Hitoshi, c/o Intellectual Property Div. , Machida, Hironobu, c/o Intellectual Property Div. , Kanno, Hiroki, c/o Intellectual Property Div.
IPC分类号： H04N1/415
CPC分类号： H04N1/40062
摘要： An image processing apparatus includes signal extracting circuits (3, 4) for extracting characteristics respectively corresponding to character and photograph sections from an image signal, a decision circuit (5) for estimating the character or photograph section from the extracted characteristics, a selector circuit (6) for selecting threshold data for binarizing the character and photograph sections in accordance with an estimation result of the estimate circuit, and a binarizing circuit for binarizing of the image signal in accordance with the selected threshold data.
摘要翻译： 图像处理装置包括用于从图像信号中提取分别对应于字符和照片部分的特征的信号提取电路（3,4），用于从提取的特性估计字符或照片部分的判定电路（5），选择器电路 6），用于根据估计电路的估计结果选择用于二值化字符和照片部分的阈值数据;以及二值化电路，用于根据所选择的阈值数据二值化图像信号。
-
公开(公告)号：EP0388889A2
公开(公告)日：1990-09-26
申请号：EP90105243.1
申请日：1990-03-20
申请人： FUJITSU LIMITED
摘要： An image data coding system, wherein an image data in a bit map form is divided into first and second groups, pixels in each group of which are distributed over the whole area of the image data in the bit map form. First and second coders (4-1, 4-2) respectively code the first and second groups of image data into first and second groups of coded image data. The first and second groups of image data in the original image data are respectively input into first and second memories (3-1, 3-2), respectively. Blocks of the first group of image data are supplied to the first coder (4-1) at first times, respectively, and blocks of the second group of image data are supplied to the second coder (4-2) at second times, respectively. Boundaries of the blocks in the first group of image data are located in different positions from boundaries of the blocks in the second group of image data, and the first times are different from the second times. In the receiver side, first and second decoders respectively decode the above first and second groups of coded image data into first and second groups of decoded image data. By composing the first and second groups of decoded image data, the original image data in the bit map form is restored.
摘要翻译： 一种图像数据编码系统，其中以位图形式的图像数据被划分为第一和第二组，每组中的像素以位图形式分布在图像数据的整个区域上。 第一和第二编码器（4-1,4-2）分别将第一和第二组图像数据编码为第一组和第二组编码图像数据。 分别将原始图像数据中的第一组图像数据和第二组图像数据分别输入到第一和第二存储器（3-1,3-2）中。 第一组图像数据的块分别在第一次被提供给第一编码器（4-1），并且第二组图像数据的块分别在第二次被提供给第二编码器（4-2） 。 第一组图像数据中的块的边界位于与第二组图像数据中的块的边界不同的位置，并且第一次与第二次不同。 在接收机侧，第一和第二解码器分别将上述第一组和第二组编码图像数据解码为第一组和第二组解码图像数据。 通过构成第一组和第二组解码图像数据，恢复位图形式中的原始图像数据。
-
公开(公告)号：EP0385421A2
公开(公告)日：1990-09-05
申请号：EP90103868.7
申请日：1990-02-28
发明人： Yoneda, Hitoshi, c/o Intellectual Property Div. , Machida, Hironobu, c/o Intellectual Property Div. , Kanno, Hiroki, c/o Intellectual Property Div.
IPC分类号： H04N1/415
CPC分类号： H04N1/40062
摘要： An image processing apparatus includes signal extracting circuits (3, 4) for extracting characteristics respectively corresponding to character and photograph sections from an image signal, a decision circuit (5) for estimating the character or photograph section from the extracted characteristics, a selector circuit (6) for selecting threshold data for binarizing the character and photograph sections in accordance with an estimation result of the estimate circuit, and a binarizing circuit for binarizing of the image signal in accordance with the selected threshold data.
摘要翻译： 一种图像处理设备包括：信号提取电路（3,4），用于从图像信号提取分别对应于字符和照片部分的特征;判定电路（5），用于根据提取的特征估计字符或照片部分;选择器电路 用于根据估计电路的估计结果选择用于对字符和照片片段进行二值化的阈值数据;以及二值化电路，用于根据选择的阈值数据对图像信号进行二值化。
-
公开(公告)号：EP0149050B1
公开(公告)日：1990-08-08
申请号：EP84113739.1
申请日：1984-11-14
发明人： Asano, Hideo
IPC分类号： H04N1/415
CPC分类号： H04N1/4135 , H04N1/415
-
-
-
-
-
-
-
-
-
搜索结果
95 条记录 (耗时 0.012 秒)
