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1.发明公开A clock free two-dimensional barcode and method for printing and reading the same 失效Verfahren zum Lesen eines zweidimensionalen Strichcodes ohne Taktsignal
公开(公告)号：EP0783160A2
公开(公告)日：1997-07-09
申请号：EP96308846.3
申请日：1996-12-05
CPC分类号： G06K7/1093 , G06K1/121 , G06K7/1417 , G06K7/1452 , G06K19/06037
摘要： Inventive two-dimensional barcodes, each having encoded digital information in a bitmap (15) representing preferably randomized encoded data bits or pixels (17), are printed onto a printed medium (10-12). The bitmap (15) may further include a plurality of block identifiers (21-24), spaced a predetermined number of encoded data bits apart, which are used to make corrections for missing or added data bits when the barcode is decoded. Upon decoding a barcode printed on the printed media, the digital information is scanned and the number of horizontal (73,74) and vertical (75,76) edges in each respective column and row of the barcode are determined. An edge is determined by selecting a pixel and determining if the two pixels adjacent to the selected pixel are of different colors. After all of the edges are counted, selected groups of columns and rows are analyzed to determine local minimas in the number of counted horizontal and vertical edges in each selected group which provide the column and row center line for each selected group. Thereafter, the binary data located at the intersection of each column and row center line are read out to produce a signal representative of the encoded digital information in the printed barcode.
摘要翻译： 每个具有编码的数字信息的发明二维条形码被打印在打印介质（10-12）上，位图（15）中表示优选地是随机化的编码数据位或像素（17）。 位图（15）还可以包括间隔预定数量的编码数据位的多个块标识符（21-24），用于在条形码解码时对丢失或添加的数据位进行校正。 在对印刷介质上打印的条形码进行解码时，扫描数字信息，并且确定条形码的每个相应列和行中的水平（73,74）和垂直（75,76）边缘的数量。 通过选择像素并确定与所选择的像素相邻的两个像素是否具有不同的颜色来确定边缘。 在对所有边缘进行计数之后，分析选定的列和行组，以确定每个选定组中计数的水平和垂直边缘数量的局部最小值，为每个选定组提供列和行中心线。 此后，读出位于每列和行中心线交点处的二进制数据，以产生表示打印的条形码中的编码数字信息的信号。
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公开(公告)号：EP0783160B1
公开(公告)日：2005-11-30
申请号：EP96308846.3
申请日：1996-12-05
CPC分类号： G06K7/1093 , G06K1/121 , G06K7/1417 , G06K7/1452 , G06K19/06037
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3.发明公开System and method for archiving digital versions of documents and for generating quality printed documents therefrom 失效的系统和方法的数字文档归档，并产生它们的高质量打印的文档
公开(公告)号：EP0751672A3
公开(公告)日：1997-09-17
申请号：EP96303485.5
申请日：1996-05-16
CPC分类号： H04N1/32133 , H04N1/32561 , H04N2201/3225 , H04N2201/3226 , H04N2201/3242 , H04N2201/3252 , H04N2201/3269 , H04N2201/3271 , H04N2201/3277
摘要： An inventive page encoding, printing, retrieval and archiving system and method wherein document information designators are encoded for pages, are described. The designator includes information regarding the location of the digital representation of the page and optionally includes page generation and reproduction information. An enhanced copier (30) or facsimile machine scans the printed designator and retrieves the stored digital representation of the page and outputs a 'subsequent original' of the page. In the alternative, when the copier (30) cannot directly access the digital representation of the page, the enhanced copier can decode the page generation and reproduction information found in the designator and apply the information to production of a high-quality photocopy. The inventive equipment is additionally adapted to create digital representations of pages, create designators for the digital representations, store the digital representations along with the designators, and output printed versions of the pages including the designators.
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4.发明公开System and method for archiving digital versions of documents and for generating quality printed documents therefrom 失效的系统和方法的数字文档归档，并产生它们的高质量打印的文档
公开(公告)号：EP0751672A2
公开(公告)日：1997-01-02
申请号：EP96303485.5
申请日：1996-05-16
CPC分类号： H04N1/32133 , H04N1/32561 , H04N2201/3225 , H04N2201/3226 , H04N2201/3242 , H04N2201/3252 , H04N2201/3269 , H04N2201/3271 , H04N2201/3277
摘要： An inventive page encoding, printing, retrieval and archiving system and method wherein document information designators are encoded for pages, are described.
The designator includes information regarding the location of the digital representation of the page and optionally includes page generation and reproduction information. An enhanced copier (30) or facsimile machine scans the printed designator and retrieves the stored digital representation of the page and outputs a 'subsequent original' of the page. In the alternative, when the copier (30) cannot directly access the digital representation of the page, the enhanced copier can decode the page generation and reproduction information found in the designator and apply the information to production of a high-quality photocopy. The inventive equipment is additionally adapted to create digital representations of pages, create designators for the digital representations, store the digital representations along with the designators, and output printed versions of the pages including the designators.摘要翻译： 根据本发明的页编码，印刷，检索和归档系统和方法worin文档信息指示符被编码为页中描述。 所述指示符包括信息关于页面的所述数字表示的位置，并且可选地包括页面生成和再现信息。 增强的复印机（30）或传真设备扫描印刷的指示符并检索页的存储的数字表示，并输出页的“后续的原稿”。 在替代方案中，当复印机（30）不能直接访问的页面的数字表示，增强的复印机可以解码页面生成和再现信息中的指示符发现和信息应用到生产高质量的复印件。 根据本发明的设备被另外angepasst创建的页面数字表示，创建用于数字表示指示符，数字表示存储非常久远的指示符，并输出印刷包括指示符的页面的版本。
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公开(公告)号：EP0866415A3
公开(公告)日：2002-01-09
申请号：EP98301733.6
申请日：1998-03-09
发明人： Zhou, Jiangying , Lopresti, Daniel
IPC分类号： G06K7/10
CPC分类号： G06K7/10861 , G06K7/1417 , G06K7/1443 , G06K19/06037 , G06K2019/06262
摘要： An image of a medium containing a machine-readable marker is processed to generate a mask containing one or more filled regions each of which is sufficiently large to contain the predetermined dimensions of the marker. To generate the mask, small image areas, i.e. "holes", having a first pixel polarity (e.g. "white") which are internal to large image areas having a different pixel polarity (e.g. "black"), are first filled with pixels having the same polarity as the surrounding larger image areas. A morphological opening operation is then performed on the filled image to leave only such filled regions as are equal in size or larger than the predetermined dimensions of the machine-readable marker. After the mask has been generated, the mask is logically combined with the original image to extract one or more candidate regions. The candidate regions are then tested to determine whether or not a machine-readable marker is present, for example, by attempting to decode portions of each candidate region. Based on the results of the test, one or more candidate regions are selected for decoding.
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6.发明公开A clock free two-dimensional barcode and method for printing and reading the same 失效无时钟信号和用于印刷方法和读出码的二维条形码
公开(公告)号：EP0783160A3
公开(公告)日：2001-07-11
申请号：EP96308846.3
申请日：1996-12-05
CPC分类号： G06K7/1093 , G06K1/121 , G06K7/1417 , G06K7/1452 , G06K19/06037
摘要： Inventive two-dimensional barcodes, each having encoded digital information in a bitmap (15) representing preferably randomized encoded data bits or pixels (17), are printed onto a printed medium (10-12). The bitmap (15) may further include a plurality of block identifiers (21-24), spaced a predetermined number of encoded data bits apart, which are used to make corrections for missing or added data bits when the barcode is decoded. Upon decoding a barcode printed on the printed media, the digital information is scanned and the number of horizontal (73,74) and vertical (75,76) edges in each respective column and row of the barcode are determined. An edge is determined by selecting a pixel and determining if the two pixels adjacent to the selected pixel are of different colors. After all of the edges are counted, selected groups of columns and rows are analyzed to determine local minimas in the number of counted horizontal and vertical edges in each selected group which provide the column and row center line for each selected group. Thereafter, the binary data located at the intersection of each column and row center line are read out to produce a signal representative of the encoded digital information in the printed barcode.
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7.发明公开Method of locating a machine-readable marker within an image 失效在einem Bild的Verfahren zum Orten einer maschinenlesbaren Markierung
公开(公告)号：EP0866415A2
公开(公告)日：1998-09-23
申请号：EP98301733.6
申请日：1998-03-09
发明人： Zhou, Jiangying , Lopresti, Daniel
IPC分类号： G06K7/10
CPC分类号： G06K7/10861 , G06K7/1417 , G06K7/1443 , G06K19/06037 , G06K2019/06262
摘要： An image of a medium containing a machine-readable marker is processed to generate a mask containing one or more filled regions each of which is sufficiently large to contain the predetermined dimensions of the marker. To generate the mask, small image areas, i.e. "holes", having a first pixel polarity (e.g. "white") which are internal to large image areas having a different pixel polarity (e.g. "black"), are first filled with pixels having the same polarity as the surrounding larger image areas. A morphological opening operation is then performed on the filled image to leave only such filled regions as are equal in size or larger than the predetermined dimensions of the machine-readable marker.
After the mask has been generated, the mask is logically combined with the original image to extract one or more candidate regions. The candidate regions are then tested to determine whether or not a machine-readable marker is present, for example, by attempting to decode portions of each candidate region. Based on the results of the test, one or more candidate regions are selected for decoding.摘要翻译： 处理包含机器可读标记的介质的图像以产生包含一个或多个填充区域的掩模，每个填充区域足够大以包含标记的预定尺寸。 为了产生掩模，首先填充具有不同像素极性的大图像区域内部具有第一像素极性（例如，“白”）的小像区，即“孔” 与周围较大的图像区域具有相同的极性。 然后对填充图像执行形态打开操作，以仅留下尺寸相等或大于机器可读标记的预定尺寸的填充区域。 在生成掩模之后，掩模与原始图像逻辑组合以提取一个或多个候选区域。 然后测试候选区域以确定机器可读标记是否存在，例如通过尝试解码每个候选区域的部分。 基于测试结果，选择一个或多个候选区域进行解码。
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