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127 条记录 (耗时 0.018 秒)

    Digital image information compression and decompression method and apparatus
    71.
    发明公开
    Digital image information compression and decompression method and apparatus 失效
    用于压缩和对数字图象信息扩展方法和装置。

    公开(公告)号：EP0089797A2

    公开(公告)日：1983-09-28

    申请号：EP83301404.6

    申请日：1983-03-15

    申请人： Ing. C. Olivetti & C., S.p.A.

    发明人： Caneschi, Mario ,  Tadini, Giorgio

    IPC分类号： H04N1/41 ,  H03M7/46

    CPC分类号： H03M7/42 ,  H04N1/2166 ,  H04N1/4105 ,  H04N1/4175

    摘要： One-dimensional compression is effected by addressing a first ROM (62) with information in respect of the length and the type of run. One-dimensional decompression is effected by addressing with the compressed code, a second ROM, bearing the information in respect of the runs and the length of the code. That is provided by a shift register controlled by a logic unit capable of recognising a group of least significant bits, to permit additional shifting of the register, and addressing of the second ROM with a bit number less than the maximum length of the codes.
    For two-dimensional compression or decompression, there is provided a pair of RAMS for temporarily storing a reference line which, together with the current line, actuates a logic means (38), for controlling coding and decoding of the latter. For compression of the medium tones, besides the runs of the two colours, coding is effect in respect of the runs of the alternations of the two colours defined on the basis of the colour of the initial pixel, and the type of the successive run is defined. Besides the coding and decoding for two- colour images, the two ROMs also carry the coding and decoding for images with the half-tones. Finally, the apparatus comprises an archive memory which can be connected to the compression module for achival storage of the images with the maximum degree of compression. By instead connecting the decompression module between the archive memory and the compression module, the image can be transmitted with a type of compression compatible with the receiving station.

    Compression of photographic and halftone images
    72.
    发明公开
    Compression of photographic and halftone images 审中-公开
    摄影和半色调图像的压缩

    公开(公告)号：EP2173102A3

    公开(公告)日：2015-07-08

    申请号：EP09169730.0

    申请日：2009-09-08

    申请人： Konica Minolta Business Technologies, Inc.

    发明人： Genda, Daisuke ,  Morita, Hideki

    IPC分类号： H04N7/26 ,  H04N1/41

    CPC分类号： H04N1/41 ,  H04N1/40062 ,  H04N1/4105 ,  H04N19/12 ,  H04N19/126 ,  H04N19/136 ,  H04N19/176 ,  H04N19/182 ,  H04N19/46 ,  H04N19/59

    摘要： Disclosed is an image processing apparatus comprising an image compression conversion unit to quantize an image having attribute data for each pixel, wherein when a region has the attribute data of a photographic image, the image compression conversion unit quantizes the region by a BTC method, wherein when a region has the attribute data of other than the photographic image, and the region is a halftone region, the image compression conversion unit quantizes the region by the BTC method, and wherein when a region has the attribute data of other than the photographic image, and the region is a high resolution region, the image compression conversion unit generates a density pattern for the region to quantize the region according to the generated density pattern.

    Bit mask generation system and printer drivers and printing methods incorporating bit masks generated utilising same
    73.
    发明公开
    Bit mask generation system and printer drivers and printing methods incorporating bit masks generated utilising same 有权
    使用系统用于生产二元掩模和打印机驱动程序和印刷工艺这些面具

    公开(公告)号：EP2166744A2

    公开(公告)日：2010-03-24

    申请号：EP09175655.1

    申请日：2004-05-20

    申请人： Software Imaging Group Limited

    发明人： Woods, Michael Ian

    IPC分类号： H04N1/405

    CPC分类号： H04N1/4051 ,  H04N1/4105

    摘要： A method of compressing data representative of a set of bit mask arrays is disclosed. Initially, data representative of a number of bit masks (54) is stored where each bit mask being a binary array is represented by a plurality of binary numbers. The binary numbers are then re-ordered to generate a plurality of sets of line masks (56) each line mask comprising a number of binary numbers wherein each binary number in a line mask corresponds to a binary number defining a part of a different one of said number of bit masks. An exclusive or operation is then performed for each pair of binary numbers in each line mask and the array after performing the operation (60) is then run length encoded. The original data can be regenerated by performing the operations in reverse.

    摘要翻译： 压缩数据代表一组位掩码阵列的制造方法是游离缺失盘。 最初，一个数位屏蔽（54）的数据代表被存储，其中每一位掩码为二进制阵列由二进制数的多元代表。 的二进制数，然后重新排序，以产生的集线掩模的多个（56）每行的掩模，包括一个数的二进制数的worin每个二进制数中一个线掩模对应于二进制数定义的不同的一个的一部分 说数位掩码。 然后异或手术，执行用于在各线掩模每对二进制数的和进行手术（60）之后的阵列然后运行长度编码。 原始数据可以通过以相反的执行操作而再生。

    Image processing circuit, displaying apparatus, and printing apparatus
    74.
    发明公开
    Image processing circuit, displaying apparatus, and printing apparatus 审中-公开
    Bildverarbeitungsschaltung，Anzeigevorrichtung und Druckvorrichtung

    公开(公告)号：EP1970858A2

    公开(公告)日：2008-09-17

    申请号：EP07022780.6

    申请日：2007-11-23

    申请人： Seiko Epson Corporation

    发明人： Ono, Yoshiyuki ,  Sawazaki, Takashi ,  Saito, Akira

    IPC分类号： G06T5/20

    CPC分类号： G06T5/002 ,  G06T5/20 ,  G06T2200/12 ,  G06T2207/20021 ,  H04N1/40075 ,  H04N1/4105

    摘要： An image processing circuit includes: a plurality of counters that extract image blocks each of which includes a predetermined number of pixels from input image data, count a number of pixels having a predetermined value for each of the image blocks, calculate a pixel value for each of the extracted image blocks, and output a plurality of bit streams each of which represents the counted number for a respective image block, the number of the plurality of counters being larger than a bit length defined for a single writing process with the memory divided by the bit length of a value calculated for an image block; a converter that converts the bit streams output from the plurality of counters, by adjusting a bit length of the bit streams for writing in the memory, and outputs the converted bit streams; and a synthesizer that synthesizes the plurality of bit streams output from the converter to generate a bit stream having the bit length defined for a single writing process with the memory, and outputs the generated bit stream.

    摘要翻译： 图像处理电路包括：多个计数器，从输入图像数据中提取图像块，每个图像块包括预定数量的像素，对每个图像块计数具有预定值的像素数，计算每个图像块的像素值 并且输出多个比特流，每个比特流表示相应图像块的计数数，多个计数器的数量大于为存储器划分的单个写入处理所定义的比特长度 为图像块计算的值的位长度; 转换器，通过调整用于在存储器中写入的比特流的比特长度来转换从多个计数器输出的比特流，并输出转换的比特流; 以及合成器，其合成从转换器输出的多个比特流，以生成具有为存储器的单个写入处理定义的比特长度的比特流，并输出生成的比特流。

    DITHERED IMAGE COMPRESSION SYSTEM
    78.
    发明公开
    DITHERED IMAGE COMPRESSION SYSTEM 审中-公开
    二维图像压缩系统

    公开(公告)号：EP1145540A1

    公开(公告)日：2001-10-17

    申请号：EP99954827.4

    申请日：1999-10-11

    申请人： Electronics for Imaging, Inc.

    发明人： LIN, Frederick

    IPC分类号： H04N1/41

    CPC分类号： H04N1/4105 ,  H04N1/40075

    摘要： A dithered image (301) compression system that converts a source image into an image that is efficiently compressed and yet preserves the visual image information of the original source image in a computer environment. A preferred embodiment of the invention removes the image data from the source image that are lost during the normal storage and halftoning stages in one step. Each pixel in the source image is compared to the threshold array values (302). If the value of the source image pixel (303) is less than the corresponding threshold array pixel (304), then a zero (309) is placed in that position in the dithered image array (308), otherwise a one is placed in the dithered image array. The dithered image array (308) is then compared with the threshold array (302), thereby creating a range array (312) where the range of each pixel is determined using the dithered image array values combined with the threshold array values. A value selection is then made from the range array (316) to create a derived image array where one value (317) is selected from the range that has been established for each pixel. The actual value selected depends on the desired print quality and/or compression ratio. The result is an image that is much simpler than the source image and can be compressed without any further loss of information because the amount of data known to be lost has been removed. The derived image will produce the same dithered image using the same threshold array as the original source image in the halftone process.

    摘要翻译： 一种抖动图像（301）压缩系统，将源图像转换为高效压缩的图像，并在计算机环境中保留原始源图像的视觉图像信息。 本发明的一个优选实施例在一个步骤中从正常存储和半色调阶段期间丢失源图像中丢失的图像数据。 将源图像中的每个像素与阈值阵列值进行比较（302）。 如果源图像像素（303）的值小于对应的阈值阵列像素（304），则在抖动图像阵列（308）中的该位置放置零（309），否则将一个置于 抖动的图像数组。 随后将抖动图像阵列（308）与阈值阵列（302）进行比较，从而创建范围阵列（312），其中使用与阈值阵列值组合的抖动图像阵列值来确定每个像素的范围。 然后从范围阵列（316）进行值选择以创建派生图像阵列，其中从为每个像素建立的范围中选择一个值（317）。 所选的实际值取决于所需的打印质量和/或压缩比率。 结果是一个比源图像简单得多的图像，并且可以在没有任何信息丢失的情况下进行压缩，因为已知丢失的数据量已被删除。 在半色调处理中，派生图像将使用与原始源图像相同的阈值阵列产生相同的抖动图像。