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    TEXTURE COMPRESSION AND DECOMPRESSION
    1.
    发明公开
    TEXTURE COMPRESSION AND DECOMPRESSION 审中-公开
    纹理压缩和减压

    公开(公告)号：EP2583249A1

    公开(公告)日：2013-04-24

    申请号：EP10858467.3

    申请日：2010-06-18

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： STRÖM, Jacob ,  WENNERSTEN, Per

    IPC分类号： G06T9/00 ,  H04N1/415

    CPC分类号： G09G5/00 ,  G06T9/00 ,  H04N1/64 ,  H04N19/105 ,  H04N19/14 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/42 ,  H04N19/90 ,  H04N19/94

    摘要： A compressing of a texel block (10) consisting of two texel sub-blocks (12, 14) involves determining respective value codewords (31, 32) and table codewords (33, 34) for the two texel sub-blocks (12, 14). The value codewords (31, 32) represent respective base texel values and the table codewords (33, 34) represent respective modifier sets comprising multiple value modifiers for modifying the base texel value associated with the given texel sub-block (12, 14). Each texel (20) in the texel block (10) is assigned a texel index associated with one of the value modifiers of the modifier set for the texel sub-block (12, 14) to which the texel (20) belongs or indicates that the base texel value of the other texel sub-block (12, 14) is to be used for the texel (20).

    摘要翻译： 对由两个纹理子块（12,14）组成的纹理块（10）的压缩包括确定两个纹理元素子块（12,14）的相应值码字（31,32）和表码字（33,34） ）。 值码字（31,32）表示相应的基本纹素值，并且表码字（33,34）表示包括用于修改与给定纹理子块（12,14）相关联的基本纹素值的多个值修改器的相应修改器集合。 纹理元素块（10）中的每个纹理元素（20）被分配与纹理元素（20）所属的或者指示纹理元素子块（12,14）的修改器集合的值修改器中的一个相关联的纹理元素索引 其他纹理子块（12,14）的基本纹素值将被用于纹理元素（20）。

    LOSSLESS IMAGE COMPRESSION WITH TREE CODING
    3.
    发明授权
    LOSSLESS IMAGE COMPRESSION WITH TREE CODING 失效
    与树编码的无损耗图像压缩

    公开(公告)号：EP0981896B1

    公开(公告)日：2003-04-02

    申请号：EP98921985.2

    申请日：1998-05-07

    申请人： TELEFONAKTIEBOLAGET LM ERICSSON

    发明人： THORELL, Per ,  EINARSSON, Torbjörn ,  PASSAGGIO, Filippo

    IPC分类号： H04N1/415 ,  H04N1/41 ,  H04N7/26 ,  G06T9/40

    CPC分类号： H04N1/413 ,  G06T9/40

    摘要： In a method and a device for coding binary matrices, in particular sparse binary matrices, a matrix is gradually partitioned into sub-matrices. During the gradual partitioning the number of binary ones are counted for each resulting sub-matrix. If a resulting sub-matrix does not consist of mixed symbols no further partitioning of that sub-matrix is required. The counted number of binary ones for each sub-matrix is then coded and transmitted. The method provides an efficient coding particularly for sparse binary matrices such as bi-level images or bit maps.

    Digital multi-functional machine capable of photocopying, printing and transmitting facsimile images
    4.
    发明公开
    Digital multi-functional machine capable of photocopying, printing and transmitting facsimile images 失效
    可数字多功能设备，照片复印，打印和发送传真图片

    公开(公告)号：EP0868069A3

    公开(公告)日：2000-05-24

    申请号：EP98105631.0

    申请日：1998-03-27

    申请人： Ricoh Company, Ltd.

    发明人： Ichimura, Hajime

    IPC分类号： H04N1/00 ,  H04N1/32 ,  H04N1/415 ,  H04N1/40

    CPC分类号： H04N1/415 ,  G06T9/005 ,  H04N1/40

    摘要： A digital multi-functional machine and method are disclosed, having at least one of picture reading, printing, and facsimile transmission capabilities, and including a printer for making visible prints in response to a demand for image prints and prints of facsimile transmission. The machine is provided with a data storage unit which is capable of storing image data either in predetermined block unit of pixels for binary image data, or in the form coded by a fixed length block truncation encoder by the block unit of pixels for multiple valued image data.

    LOSSLESS IMAGE COMPRESSION WITH TREE CODING
    5.
    发明公开
    LOSSLESS IMAGE COMPRESSION WITH TREE CODING 失效
    与树编码的无损耗图像压缩

    公开(公告)号：EP0981896A1

    公开(公告)日：2000-03-01

    申请号：EP98921985.2

    申请日：1998-05-07

    申请人： TELEFONAKTIEBOLAGET LM ERICSSON

    发明人： THORELL, Per ,  EINARSSON, Torbjörn ,  PASSAGGIO, Filippo

    IPC分类号： H04N1/415 ,  H04N1/41 ,  H04N7/26 ,  G06T9/40

    CPC分类号： H04N1/413 ,  G06T9/40

    摘要： In a method and a device for coding binary matrices, in particular sparse binary matrices, a matrix is gradually partitioned into sub-matrices. During the gradual partitioning the number of binary ones are counted for each resulting sub-matrix. If a resulting sub-matrix does not consist of mixed symbols no further partitioning of that sub-matrix is required. The counted number of binary ones for each sub-matrix is then coded and transmitted. The method provides an efficient coding particularly for sparse binary matrices such as bi-level images or bit maps.

    METHOD AND APPARATUS FOR ENCODING A FACSIMILE MESSAGE
    6.
    发明公开
    METHOD AND APPARATUS FOR ENCODING A FACSIMILE MESSAGE 失效
    VERFAHREN UND ANORDNUNG ZUR KODIERUNG VON FAKSIMILENACHRICHTEN

    公开(公告)号：EP0764379A4

    公开(公告)日：1997-05-28

    申请号：EP95923700

    申请日：1995-06-06

    申请人： MOTOROLA INC

    发明人： LIN JYH-HAN ,  ORLEN NOAH PAUL

    IPC分类号： H04N1/419 ,  H04N1/41 ,  H04N1/415

    CPC分类号： H04N1/419

    摘要： A decoder for decoding a target image from a signal. The signal includes S facsimile encoded sub-image messages transmitted in a predetermined order. The decoder also stores a runlength code book. The decoder includes a facsimile decoder (910), a sub-image memory (920), a target image generator (940), and a target image memory (930). The facsimile decoder (910) is for generating S sub-images from the S facsimile encoded sub-image messages, using the runlength code book. Each of the S sub-images includes sub-image lines including pixels. The sub-image memory (920) is for storing the S sub-images. The target image generator (940) is for re-assembling the target image from the S sub-images. The target image memory (930) is for storing the target image.

    摘要翻译： 一种用于从信号中解码目标图像的解码器。 该信号包括以预定顺序发送的S个传真编码的子图像消息。 解码器还存储游程长度代码簿。 解码器包括传真解码器（910），子图像存储器（920），目标图像生成器（940）和目标图像存储器（930）。 传真解码器（910）用于使用游程长度码本从S传真编码的子图像消息中产生S个子图像。 每个S子图像包括包含像素的子图像线。 子图像存储器（920）用于存储S个子图像。 目标图像生成器（940）用于从S子图像重新组合目标图像。 目标图像存储器（930）用于存储目标图像。

    A method of and system for compressing and decompressing digital image signals
    7.
    发明公开
    A method of and system for compressing and decompressing digital image signals 失效
    Verfahren und System zur Kompression und Dekompression von digitalen Bildsignalen

    公开(公告)号：EP0746143A1

    公开(公告)日：1996-12-04

    申请号：EP96201316.5

    申请日：1996-05-15

    申请人： Océ-Nederland B.V.

    发明人： Cornelissen, Petrus Antonius Maria

    IPC分类号： H04N1/415

    CPC分类号： H04N1/415

    摘要： A method of compressing digital image data, comprising successive data groups of bits, the contents of which are values of pixels of an image, in which method a check is made in a selection step whether a first condition is satisfied which at least stipulates that a data group has the same contents as one or more data groups following thereon. If the first condition is satisfied, said data groups are replaced, in a compression step, by a compression code representing these data groups. Otherwise, in a copying step, only the first data group is replaced by a code consisting of the contents of the data group. The said steps are repeated for the next data groups. The method also comprises an identification step for adding an identification code for characterising the nature of the code, wherein the identification step is carried out only when the compression step is carried out.

    摘要翻译： 一种压缩数字图像数据的方法，包括连续的位数据组，其内容是图像的像素值，在该方法中，在选择步骤中进行检查，是否满足第一条件，该第一条件至少规定 数据组与其后的一个或多个数据组具有相同的内容。 如果满足第一条件，则在压缩步骤中，通过代表这些数据组的压缩代码来替换所述数据组。 否则，在复制步骤中，只有第一个数据组被由数据组的内容组成的代码替代。 对于下一个数据组重复上述步骤。 该方法还包括用于添加用于表征代码性质的识别码的识别步骤，其中仅当执行压缩步骤时才执行识别步骤。