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公开(公告)号：EP0871294B1
公开(公告)日：2005-08-10
申请号：EP98201925.9
申请日：1991-02-26
申请人： FUJITSU LIMITED
IPC分类号： H03M7/30
CPC分类号： G06T9/005 , H03M7/3088
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公开(公告)号：EP0422544B1
公开(公告)日：1996-05-29
申请号：EP90119238.5
申请日：1990-10-08
申请人： FUJITSU LIMITED
发明人： Nakano, Yasuhiko , Yoshida, Shigeru
IPC分类号： H04N1/46
CPC分类号： G06T11/001 , H04N1/62
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公开(公告)号：EP0412809B1
公开(公告)日：1995-12-13
申请号：EP90308746.8
申请日：1990-08-08
申请人： FUJITSU LIMITED
CPC分类号： H04N1/413 , H04N1/4175
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公开(公告)号：EP0412809A3
公开(公告)日：1992-07-15
申请号：EP90308746.8
申请日：1990-08-08
申请人： FUJITSU LIMITED
CPC分类号： H04N1/413 , H04N1/4175
摘要： Use is made of a universal coding unit for compression of mainly picture image data. At this time, the picture image data input to the universal coding unit is preprocessed. That is, the information showing the mode classification and mode condition of changing picture elements appearing when sequentially scanning picture image data are transformed to fixed length codes. Provision is made of a fixed length coding unit for this purpose. The above information is preferably collected in units of contours forming the picture image data. Alternatively, the picture image data is preferably collected for two adjoining scanning lines.
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公开(公告)号：EP0422544A3
公开(公告)日：1992-06-03
申请号：EP90119238.5
申请日：1990-10-08
申请人： FUJITSU LIMITED
发明人： Nakano, Yasuhiko , Yoshida, Shigeru
IPC分类号： H04N1/46
CPC分类号： G06T11/001 , H04N1/62
摘要： A color image data processing apparatus (1) processes hue information of picture elements read out sequentially. The apparatus comprises a chromatic color detection unit (4) for detecting a chromatic color picture element series that is a consecutive succession of chromatic color picture elements in a main scanning line, a replacing unit (5) for replacing the hue value of each picture element of the chromatic color picture element series with the hue value of a picture element located approximately at the center position of the detected chromatic color picture element series. The apparatus may further include an averaged hue value switching unit for switching the replaced hue value of each of the picture elements with the average of the replaced hue values of each picture element and picture elements located in a nearby region of said each picture elements.
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公开(公告)号：EP0422544A2
公开(公告)日：1991-04-17
申请号：EP90119238.5
申请日：1990-10-08
申请人： FUJITSU LIMITED
发明人： Nakano, Yasuhiko , Yoshida, Shigeru
IPC分类号： H04N1/46
CPC分类号： G06T11/001 , H04N1/62
摘要： A color image data processing apparatus (1) processes hue information of picture elements read out sequentially. The apparatus comprises a chromatic color detection unit (4) for detecting a chromatic color picture element series that is a consecutive succession of chromatic color picture elements in a main scanning line, a replacing unit (5) for replacing the hue value of each picture element of the chromatic color picture element series with the hue value of a picture element located approximately at the center position of the detected chromatic color picture element series. The apparatus may further include an averaged hue value switching unit for switching the replaced hue value of each of the picture elements with the average of the replaced hue values of each picture element and picture elements located in a nearby region of said each picture elements.
摘要翻译： 彩色图像数据处理装置顺序地读出图像元素的色调信息。 该装置包括：彩色检测单元，用于检测作为主扫描线中的彩色彩色像素的连续相继的彩色彩色像素序列;替换单元，用于替换彩色像素的每个像素的色相值 具有大致位于检测到的彩色彩色像素序列的中心位置的像素的色调值。 该装置还可以包括平均色调值切换单元，用于以每个图像元素和位于所述每个图像元素的附近区域中的图像元素的平均替换色调值来切换每个图像元素的替换色调值。
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公开(公告)号：EP0871295B1
公开(公告)日：2004-03-24
申请号：EP98201926.7
申请日：1991-02-26
申请人： FUJITSU LIMITED
IPC分类号： H03M7/30
CPC分类号： G06T9/005 , H03M7/3088
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公开(公告)号：EP0871294A3
公开(公告)日：1998-12-30
申请号：EP98201925.9
申请日：1991-02-26
申请人： FUJITSU LIMITED
IPC分类号： H03M7/30
CPC分类号： G06T9/005 , H03M7/3088
摘要： A coding is carried out by designating the reference number of a partial sequence having the maximum length coincidence from the coded partial sequences registered in a dictionary with regard to a received character sequence, designating a new reference number to a partial sequence which is obtained by adding one character to a reference number obtained as a code word, and registering the new reference number designated partial sequence in the dictionary. A decoding is carried out by searching partial sequences registered in the dictionary using a code word represented by the reference number of the partial sequence, restoring the original partial sequence, designating a new reference number to a partial sequence which is obtained by adding the beginning character of the currently restored partial sequence to the previously processed code word, and registering the new reference number designated partial sequence in the dictionary. According to the invention, the following steps are provided :
constituting a reference dictionary by a group of dictionaries comprising :
a number of dictionaries less than the number of entire kinds of characters to be processed, and for each dictionary, initially registering character sequences which occur with higher frequency of occurrence and comprise one character of the entire kinds of characters per character or a plurality of characters per character with designations of reference numbers; coding the received character sequences by designating a specific dictionary from the group of dictionaries according to search information representing the dependency relation to coded character sequences; and if a received character sequence does not exist in the designated dictionary, registering a character sequence which is obtained by adding a sequence character to the reference number of a coded character sequence with a designation of a new reference number.-
公开(公告)号：EP0871295A2
公开(公告)日：1998-10-14
申请号：EP98201926.7
申请日：1991-02-26
申请人： FUJITSU LIMITED
IPC分类号： H03M7/30
CPC分类号： G06T9/005 , H03M7/3088
摘要： A coding is carried out by designating the reference number of a partial sequence having the maximum length coincidence from the coded partial sequences registered in a dictionary with regard to a received character sequence, designating a new reference number to a partial sequence which is obtained by adding one character to a reference number obtained as a code word, and registering the new reference number designated partial sequence in the dictionary. A decoding is carried out by searching partial sequences registered in the dictionary using a code word represented by the reference number of the partial sequence, decompressing the original partial sequence, designating a new reference number to a partial sequence which is obtained by adding the beginning character of the currently decompressed partial sequence to the previously processed code word, and registering the new reference number designated partial sequence in the dictionary. According to the invention, the following steps are provided :
constituting a registration dictionary by registering a substantial partial sequence for each of the last characters of the first partial sequence of successive two partial sequences or each of the groups based on the last character;
designating a registration number of a partial sequence to be registered for each of the last characters or each of groups based on the last character; and
constituting a code word of partial sequence to be coded based on the designated registration number.-
公开(公告)号：EP0688104A3
公开(公告)日：1996-01-31
申请号：EP95113406.3
申请日：1991-08-09
申请人： FUJITSU LIMITED
CPC分类号： G06T9/005 , H03M7/3088
摘要： In a data compression method based on an LZW coding procedure, a list (100,101) which defines a sequence of tracing partial strings registered in a dictionary (220) is defined so that successive partial strings are arranged in groups based on given significant bits. The search of the dictionary (220) is thus made easier because the search can be restricted to a single group.
摘要翻译： 在基于LZW编码过程的数据压缩方法中，定义了定义在字典（220）中注册的跟踪部分串的序列的列表（100,101），以便基于给定的有效比特将连续的部分串排列成组。 因此，搜索可以被限制为单个组，因此使词典（220）的搜索变得更容易。
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