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    • 4. 发明授权
    • Method for compressing and decompressing digital data
    • 压缩和解压缩数字数据的方法
    • US08837841B2
    • 2014-09-16
    • US13287702
    • 2011-11-02
    • Maurice L. M. Luttmer
    • Maurice L. M. Luttmer
    • G06K9/36H04N1/411H03M7/30H04N1/41
    • H03M7/3086H04N1/4105H04N1/4115
    • A method of compressing and decompressing digital data that is especially suitable for halftoned image data in which every bit represents the marking of a receiving material by ink or toner is provided. The method is lossless and balances the use of memory, the processing time, the compression factor and the cost of hardware resources. The recurrence of data in halftoned images on which the smaller data size of the compressed data is based, is caused by the use of a halftone dither matrix. Various halftone dither matrices may be used in the halftoned image. The method is adapted to employ the characteristics of a specific halftone dither matrix by applying a dynamic set of offset values, in which an offset value represents a number of words between the current word of digital data and an identical, previously processed word.
    • 提供了一种压缩和解压缩数字数据的方法,该数字数据特别适用于通过墨水或调色剂对每个位表示接收材料的标记的半色调图像数据。 该方法是无损的,平衡了内存的使用,处理时间,压缩因素和硬件资源的成本。 使用半色调抖动矩阵引起压缩数据的较小数据大小所依赖的半色调图像中的数据的再现。 可以在半色调图像中使用各种半色调抖动矩阵。 该方法适于通过应用一组偏移值来采用特定半色调抖动矩阵的特征,其中偏移值表示数字数据的当前字和相同的先前处理的字之间的字数。
    • 5. 发明授权
    • Method and apparatus for converting image representation formats as well
as an image production system provided with such an apparatus
    • 用于转换图像表示格式的方法和装置以及具有这种装置的图像制作系统
    • US5726760A
    • 1998-03-10
    • US627110
    • 1996-04-03
    • Maurice L. M. Luttmer
    • Maurice L. M. Luttmer
    • B41J5/30G06F3/12G06K9/50G06T9/00G09G5/00H03M7/30H04N1/21H04N1/40
    • G06K9/50G06T9/005
    • A method and apparatus that convert a series of drawing instructions, suitable for assigning pixel values corresponding to the drawing instructions to an image arranged in rows and columns of pixels, to a series of runlengths and corresponding pixel values. A runlength represents the number of successive pixels with mutual identical pixel values while the series of runlengths and pixel values is arranged according to a first order as determined by successive pixel positions. The runlengths of the pixel values (as generated by the drawing instructions) are determined in a second order which is different from the first order. Consequently, the insert positions of these runlengths are determined on the basis of pixel positions which correspond with said determined runlengths. On the basis of these insert positions, the determined runlengths are inserted in the series of runlengths so that runlengths in the series (which have positions in common with the runlengths to be inserted) are modified in dependance on the runlengths and pixel values to be inserted.
    • 将一系列绘图指令转换成一系列绘图指令的方法和装置,其适用于将对应于绘图指令的像素值分配给排列成行和列的像素的图像到一系列游程长度和对应的像素值。 游程长度表示具有相互相同像素值的连续像素的数量,而一系列游程长度和像素值根据由连续像素位置确定的一阶排列。 以与第一顺序不同的第二顺序来确定像素值(由绘图指令生成)的游程长度。 因此,这些游程长度的插入位置是基于与所确定的游程长度对应的像素位置来确定的。 在这些插入位置的基础上,确定的游程长度被插入到一系列的游程长度中,使得系列中的游程长度(具有与要插入的游程长度相同的位置)根据要插入的游程长度和像素值进行修改 。
    • 6. 发明授权
    • Apparatus for rasterizing image data in outline form
    • 用于以轮廓形式光栅化图像数据的装置
    • US5528733A
    • 1996-06-18
    • US994993
    • 1992-12-22
    • Maurice L. M. Luttmer
    • Maurice L. M. Luttmer
    • G09G5/36G06K15/02G06K15/12G06T11/20H04N1/405H04N1/409G06K15/00
    • G06K15/02G06K15/12G06K2215/0045G06K2215/006
    • Image data in outline form is automatically converted into a bit map for a reproduction means, using the half bitting effect for more accurate positioning of image boundaries. The pixels are divided up into strips each associated with an effective boundary line position and a half bit pattern by means of which the effective boundary line position can be reached. These strips are so selected that a point within the strip is situated closer to the associated effective boundary line position than to the pixel boundary or to another effective boundary line position. For pixels which are intersected by the outline, a check is made as to whether the outline extends entirely within such a strip and the pixels which satisfy this condition are given a value in accordance with the associated half bit pattern if they are flanked by at least one other pixel satisfying the same condition.
    • 轮廓形式的图像数据自动转换为再现装置的位图,使用半点击效果更准确地定位图像边界。 像素被分成条带,每个条带与有效边界线位置和半位图案相关联,借此可以到达有效边界线位置。 这些条被选择成使得条带内的点位于比与像素边界或另一有效边界线位置更靠近相关联的有效边界线位置。 对于与轮廓相交的像素,检查轮廓是否完全在这样的条带内延伸,并且满足该条件的像素如果它们至少位于两侧,则根据相关联的半位模式给出一个值 满足相同条件的另一个像素。
    • 7. 发明授权
    • Lossless compression of color image data using entropy encoding
    • 使用熵编码对彩色图像数据进行无损压缩
    • US08300956B2
    • 2012-10-30
    • US11658467
    • 2005-07-26
    • Maurice L. M. LuttmerPhilippe SobczakJulien Malik
    • Maurice L. M. LuttmerPhilippe SobczakJulien Malik
    • G06K9/36
    • H04N1/417
    • A method compresses a digital continuous tone image of pixels situated on scan lines. The method includes the steps of, for a current pixel to be encoded, said current pixel having an actual pixel value, predicting a predicted pixel value based on pixel values of at least one previously processed pixel from the same image, using a fixed rule, determining a difference parameter based on a difference value of said predicted pixel value and the actual pixel value of said current pixel to be encoded, and inspecting the difference parameter for existence of an uninterrupted series of highest order bits having a value equal to zero, removing at least part of said highest order zero bits, and, if a number of bits within predetermined limits remains, generating a compression code having a predetermined fixed length, said code indicating the number of remaining bits.
    • 一种方法压缩位于扫描线上的像素的数字连续色调图像。 该方法包括以下步骤:对于要编码的当前像素,所述当前像素具有实际像素值,使用固定规则,基于来自相同图像的至少一个先前处理的像素的像素值预测预测像素值, 基于所述预测像素值的差值和要编码的所述当前像素的实际像素值来确定差分参数,并且检查差分参数以存在具有等于零的不间断一系列最高阶位,去除 所述最高阶零位的至少一部分,并且如果剩余预定限度内的比特数,则产生具有预定固定长度的压缩码,所述代码指示剩余比特数。
    • 9. 发明申请
    • Lossless Compression of Color Image Data Using Entropy Encoding
    • 使用熵编码对彩色图像数据进行无损压缩
    • US20090129691A1
    • 2009-05-21
    • US11658467
    • 2005-07-26
    • Maurice L. M. LuttmerPhilippe SobczakJulien Malik
    • Maurice L. M. LuttmerPhilippe SobczakJulien Malik
    • G06K9/36G06K9/46
    • H04N1/417
    • A method compresses a digital continuous tone image of pixels situated on scan lines. The method includes the steps of, for a current pixel to be encoded, said current pixel having an actual pixel value, predicting a predicted pixel value based on pixel values of at least one previously processed pixel from the same image, using a fixed rule, determining a difference parameter based on a difference value of said predicted pixel value and the actual pixel value of said current pixel to be encoded, and inspecting the difference parameter for existence of an uninterrupted series of highest order bits having a value equal to zero, removing at least part of said highest order zero bits, and, if a number of bits within predetermined limits remains, generating a compression code having a predetermined fixed length, said code indicating the number of remaining bits.
    • 一种方法压缩位于扫描线上的像素的数字连续色调图像。 该方法包括以下步骤:对于要编码的当前像素,所述当前像素具有实际像素值,使用固定规则,基于来自相同图像的至少一个先前处理的像素的像素值预测预测像素值, 基于所述预测像素值的差值和要编码的所述当前像素的实际像素值来确定差分参数,并且检查差分参数以存在具有等于零的不间断一系列最高阶位,去除 所述最高阶零位的至少一部分,并且如果剩余预定限度内的比特数,则产生具有预定固定长度的压缩码,所述代码指示剩余比特数。