Patents by Inventor Volker Lohweg

Volker Lohweg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9947163
    Abstract: A method of authenticating security documents and a mobile device, especially a smartphone, programmed to carry out the method, based on an analysis of features which are produced by intaglio printing, which analysis involves a decomposition of sample images of a candidate document to be authenticated based on Wavelets, each sample image being digitally processed by performing a Wavelet transform of the sample image in order to derive a set of classification features. The method is based on an adaptive approach, which includes the following steps: —prior to carrying out the Wavelet transform, defining a categorization map containing local information about different intaglio line structures that are found on the security documents; —carrying out a Wavelet selection amongst a pool of Wavelet types based on the categorization map; and —performing the Wavelet transform of the sample image on the basis of the selected Wavelet.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: April 17, 2018
    Assignee: KBA-NotaSys SA
    Inventors: Volker Lohweg, Jan Leif Hoffmann, Helene Dörksen, Roland Hildebrand, Eugen Gillich, Jürg Hofmann, Johannes Georg Schaede
  • Patent number: 9900463
    Abstract: There is described a new coding approach for printed document authentication, one objective of which is to increase the difficulty of copying. In addition, this new coding approach provides better performance compared to other 2D coding technologies under certain constraints. The new coding technique requires less print space in comparison to other coding techniques. This is achieved by optimizing some of the features which are used in standard 2D-codes for stabilization and which are necessary for e.g. mobile applications. Furthermore, the code can be decomposed in elementary units, or “byte-units” which can be widely spread over a text document. Such “byte-units” can in particular be used for integration in text symbols. If a document protected with such a coding is copied, at least some of these symbols will be extensively degraded by the copying process. Therefore, copy detection is intrinsically achieved thanks to the new coding technique.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: February 20, 2018
    Assignee: KBA-NotaSys SA
    Inventors: Jan-Friedrich Ehlenbröker, Volker Lohweg
  • Publication number: 20160352962
    Abstract: There is described a new coding approach for printed document authentication, one objective of which is to increase the difficulty of copying. In addition, this new coding approach provides better performance compared to other 2D coding technolo gies under certain constraints. The new coding technique requires less print space in comparison to other coding techniques. This is achieved by optimising some of the features which are used in standard 2D-codes for stabilisation and which are necessary for e.g. mobile applications. Furthermore, the code can be decomposed in elementary units, or “byte-units” which can be widely spread over a text document. Such “byte-units” can in particular be used for integration in text symbols. If a document protected with such a coding is copied, at least some of these symbols will be extensively degraded by the copying process. Therefore, copy detection is intrinsically achieved thanks to the new coding technique.
    Type: Application
    Filed: January 28, 2015
    Publication date: December 1, 2016
    Inventors: Jan-Friedrich EHLENBRÖKER, Volker LOHWEG
  • Publication number: 20160012658
    Abstract: A method of authenticating security documents and a mobile device, especially a smartphone, programmed to carry out the method, based on an analysis of features which are produced by intaglio printing, which analysis involves a decomposition of sample images of a candidate document to be authenticated based on Wavelets, each sample image being digitally processed by performing a Wavelet transform of the sample image in order to derive a set of classification features. The method is based on an adaptive approach, which includes the following steps: —prior to carrying out the Wavelet transform, defining a categorization map containing local information about different intaglio line structures that are found on the security documents; —carrying out a Wavelet selection amongst a pool of Wavelet types based on the categorization map; and —performing the Wavelet transform of the sample image on the basis of the selected Wavelet.
    Type: Application
    Filed: February 4, 2014
    Publication date: January 14, 2016
    Applicant: KBA-NOTASYS SA
    Inventors: Volker LOHWEG, Jan Leif HOFFMANN, Helene DÖRKSEN, Roland HILDEBRAND, Eugen GILLICH, Jürg HOFMANN, Johannes Georg SCHAEDE
  • Patent number: 9042632
    Abstract: There is described a method for touchless counting of substantially planar substrates, especially banknotes, which are stacked in the form of stacks of substrates, said method comprising the following steps: taking at least one sample image of a portion of a side of a stack of substrates, which sample image contains contrast information representing substrate edges that extend along substantially a first direction in the sample image; processing the contrast information representing the substrate edges within the sample image (10), which processing includes subjecting at least one area of interest (20) within the sample image (10) to anisotropic diffusion to produce a processed image containing a substantially coherent set of continuous lines representing the substrate edges; and counting the number of substrate edges in said processed image.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: May 26, 2015
    Assignee: KBA-NOTASYS SA
    Inventors: Denis Petker, Volker Lohweg, Eugen Gillich, Thomas Türke, Harald Heinrich Willeke, Johannes Georg Schaede
  • Patent number: 8781205
    Abstract: There is described a method for checking the authenticity of security documents, in particular banknotes, wherein authentic security documents comprise security features (41-49; 30; 10; 51, 52) printed, applied or otherwise provided on the security documents, which security features comprise characteristic visual features intrinsic to the processes used for producing the security documents. The method comprises the step of digitally processing a sample image of at least one region of interest (R.o.I.) of the surface of a candidate document to be authenticated, which region of interest encompasses at least part of the security features, the digital processing including performing a decomposition of the sample image by means of wavelet transform (WT) of the sample image. Such decomposition of the sample image is based on a wavelet packet transform (WPT) of the sample image, preferably a so-called two-dimensional shift invariant WPT (2D-SIWPT).
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: July 15, 2014
    Assignee: KBA-Notasys SA
    Inventors: Stefan Glock, Eugen Gillich, Johannes Georg Scheade, Volker Lohweg
  • Patent number: 8781204
    Abstract: There is described a method for checking the authenticity of security documents, in particular banknotes, wherein authentic security documents comprise security features printed, applied or otherwise provided on the security documents, which security features comprise characteristic visual features intrinsic to the processes used for producing the security documents. The method comprises the steps of (i) acquiring a sample image of at least one region of interest of the surface of a candidate document to be authenticated, which region of interest encompasses at least part of the security features, (ii) digitally processing the sample image by performing a decomposition of the sample image into at least one scale sub-space containing high resolution details of the sample image and extracting classifying features from the scale sub-space, and (iii) deriving an authenticity rating of the candidate document based on the extracted classifying features.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: July 15, 2014
    Assignee: KBA-Notasys SA
    Inventors: Volker Lohweg, Eugen Gillich, Johannes Schaede
  • Publication number: 20140147029
    Abstract: There is described a method for touchless counting of substantially planar substrates, especially banknotes, which are stacked in the form of stacks of substrates, said method comprising the following steps: taking at least one sample image of a portion of a side of a stack of substrates, which sample image contains contrast information representing substrate edges that extend along substantially a first direction in the sample image; processing the contrast information representing the substrate edges within the sample image (10), which processing includes subjecting at least one area of interest (20) within the sample image (10) to anisotropic diffusion to produce a processed image containing a substantially coherent set of continuous lines representing the substrate edges; and counting the number of substrate edges in said processed image.
    Type: Application
    Filed: June 23, 2011
    Publication date: May 29, 2014
    Applicant: KBA-NotaSys SA
    Inventors: Denis Petker, Volker Lohweg, Eugen Gillich, Thomas Türke, Harald Heinrich Willeke, Johannes Georg Schaede
  • Patent number: 8613254
    Abstract: There is described a method for detection of occurrence of printing errors on printed substrates during processing thereof on a printing press comprising the steps of providing multiple sensors on functional components of the printing press to monitor the behavior of the printing press during processing of the printed substrates and performing an in-line analysis of the behavior of the printing press to determine occurrence of a characteristic behavior of the printing press which leads or is likely to lead to occurrence of printing errors on the printed substrates or which leads or is likely to lead to good printing quality of the printed substrates. In-line analysis of the behavior of the printing press preferably includes performing fuzzy pattern classification of the behavior of the printing press. According to one embodiment of the proposed method in-line analysis of the behavior of the printing press is coupled with an in-line optical inspection of the printed substrates.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: December 24, 2013
    Assignee: KBA-Notasys SA
    Inventors: Volker Lohweg, Johannes Georg Schaede, Thomas Türke
  • Patent number: 8571327
    Abstract: A method for controlling the quality of printed documents, such as banknotes, in which only part of the surface of the printed documents is available for inspection, comprising the steps of (i) storing a reference image; (ii) acquiring a sample image of a sample printed document to be controlled, which sample image covers only a limited portion of the sample printed document; (iii) selecting a search pattern within the acquired sample image; (iv) searching the reference image for a match with the selected search pattern, (v) determining control parameters linked to the position of the search pattern within said sample image and within said reference image, (vi) comparing the control parameters linked to the position of the search pattern within the sample image with the control parameters linked to the position of the search pattern within the reference image; and (vii) based on the results of the comparison of the control parameters, accepting or rejecting the sample printed document.
    Type: Grant
    Filed: September 3, 2007
    Date of Patent: October 29, 2013
    Assignee: KBA-NotaSys SA
    Inventors: Jörn Sacher, Bernd Stöber, Harald Willeke, Volker Lohweg, Thomas Türke
  • Patent number: 8528477
    Abstract: There is described a sheet inspection system for a sheet-fed recto-verso printing press of the type comprising two printing cylinders (10, 20) for carrying out simultaneous recto-verso printing of the sheets, said sheet inspection system comprising at least a first inspection device (100) for taking an image of a first side of the printed sheets. The first inspection device (100) comprises a first line image sensor (110) for performing line-scanning image acquisition of the first side of the printed sheets, and the first inspection device (100) is disposed in such a way that the first line image sensor visually acquires an image of a printed sheet while the said printed sheet is still adhering onto the surface of a first one (10) of the two printing cylinders (10, 20) of the printing press and immediately before the said printed sheet is transferred to a chain gripper system (5) of the printing press. Also described is a printing press equipped with the inspection system.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: September 10, 2013
    Assignee: KBA-Notasys SA
    Inventors: Johannes Georg Schaede, Volker Lohweg, Bernd Stöber, Volkmar Schwitzky, Günther Hoier
  • Publication number: 20120328179
    Abstract: There is described a method for checking the authenticity of security documents, in particular banknotes, wherein authentic security documents comprise security features (41-49; 30; 10; 51, 52) printed, applied or otherwise provided on the security documents, which security features comprise characteristic visual features intrinsic to the processes used for producing the security documents. The method comprises the step of digitally processing a sample image of at least one region of interest (R.o.I.) of the surface of a candidate document to be authenticated, which region of interest encompasses at least part of the security features, the digital processing including performing a decomposition of the sample image by means of wavelet transform (WT) of the sample image.
    Type: Application
    Filed: August 11, 2010
    Publication date: December 27, 2012
    Applicant: KBA-NOTASYS SA
    Inventors: Stefan Glock, Eugen Gillich, Johannes Georg Scheade, Volker Lohweg
  • Patent number: 8065957
    Abstract: There is described a sheet inspection system for a sheet-fed recto-verso printing press of the type comprising two printing cylinders (10, 20) for carrying out simultaneous recto-verso printing of the sheets, said sheet inspection system comprising at least one inspection device (200; 300; 400) for taking an image of one side of the printed sheets. The sheet inspection system comprises first and second transfer cylinders (60, 65) interposed between a first (10) of the two printing cylinders (10, 20) and a chain gripper system (5) of the printing press, printed sheets being transferred successively from the first printing cylinder (10) to the first transfer cylinder (60), to the second transfer cylinder (65), and to the chain gripper system (5).
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: November 29, 2011
    Assignee: KBA-NotaSys SA
    Inventors: Johannes Georg Schaede, Volker Lohweg, Bernd Stöber, Volkmar Schwitzky, Günther Hoier
  • Publication number: 20100195894
    Abstract: There is described a method for checking the authenticity of security documents, in particular banknotes, wherein authentic security documents comprise security features printed, applied or otherwise provided on the security documents, which security features comprise characteristic visual features intrinsic to the processes used for producing the security documents. The method comprises the steps of (i) acquiring a sample image of at least one region of interest of the surface of a candidate document to be authenticated, which region of interest encompasses at least part of the security features, (ii) digitally processing the sample image by performing a decomposition of the sample image into at least one scale sub-space containing high resolution details of the sample image and extracting classifying features from the scale sub-space, and (iii) deriving an authenticity rating of the candidate document based on the extracted classifying features.
    Type: Application
    Filed: June 2, 2008
    Publication date: August 5, 2010
    Applicant: KBA-GIORI S.A.
    Inventors: Volker Lohweg, Eugen Gillich, Johannes Schaede
  • Publication number: 20100189311
    Abstract: A method for controlling the quality of printed documents, such as banknotes, in which only part of the surface of the printed documents is available for inspection, comprising the steps of (i) storing a reference image; (ii) acquiring a sample image of a sample printed document to be controlled, which sample image covers only a limited portion of the sample printed document; (iii) selecting a search pattern within the acquired sample image; (iv) searching the reference image for a match with the selected search pattern, (v) determining control parameters linked to the position of the search pattern within said sample image and within said reference image, (vi) comparing the control parameters linked to the position of the search pattern within the sample image with the control parameters linked to the position of the search pattern within the reference image; and (vii) based on the results of the comparison of the control parameters, accepting or rejecting the sample printed document.
    Type: Application
    Filed: September 3, 2007
    Publication date: July 29, 2010
    Inventors: Jorn Sacher, Bernd Stöber, Harald Willeke, Volker Lohweg, Thomas Türke
  • Patent number: 7672486
    Abstract: The quality of printed matter, which is one of several copies of the same printed matter produced by a printing machine, is evaluated. An amount of copies of the printed matter is selected from the total production of this printed matter. The selected amount of these copies are evaluated with regard to at least one error type which belongs to an amount of different error types or with regard to at least one feature of the error. Within the selected amount of copies, an error of a defined error type or of a defined feature, which is detected on at least one of the copies, is evaluated in relation to at least one error of another type or feature detected on the same copy, or another copy of the selected amount. The printed matter is classified as having good or bad quality based on that evaluation. A common reading, producing image data, is obtained by an image sensor from the selected copies.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: March 2, 2010
    Assignee: Koenig & Bauer Aktiengesellschaft
    Inventors: Carsten Diederichs, Volker Lohweg, Thomas Türke, Harald Heinrich Willeke
  • Patent number: 7609878
    Abstract: Color deviations of images are analyzed using a sensor. The received image sensor signal is analyzed pixel by pixel. An image sensor signal is produced for each color channel from a plurality of color channels. An image sensor signal from a first channel, and one from a second channel, are combined. An output signal of a first color contrast channel is generated. Now an image sensor signal from a third channel is combined with the ones from the first and second image sensors. An output signal of a second color contrast channel is generated. The outputs of these color contrast channels are classified.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: October 27, 2009
    Assignee: Koenig & Bauer Aktiengesellschaft
    Inventors: Volker Lohweg, Harald Heinrich Willeke
  • Patent number: 7513196
    Abstract: At least one register and an ink density are controlled in a printing machine having at least one printing unit which includes a forme cylinder, a transfer cylinder, and a counter-pressure cylinder. An image sensor records an image from a print substrate, which is imprinted with ink, inside the printing unit, and sends data correlated to that image to an evaluation unit. The data for the last printed image is compared with prior data and in response, the evaluation unit generates a command that is directed to an actuator for controlling the supply of ink. The image sensor is oriented towards the print substrate and detects the entire width of the printed substrate, which width is transverse to a direction of substrate conveyance. The evaluation unit generates the actuating command to control the supply of ink based on data from the image sensor and taken over the entire width of the substrate. The evaluation unit also controls register, based on this data.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: April 7, 2009
    Assignee: Koenig & Bauer Aktiengesellschaft
    Inventors: Stefan Arthur Budach, Volker Lohweg, Bernd Rüdiger Stöber, Harald Heinrich Willeke
  • Publication number: 20090025594
    Abstract: There is described a sheet inspection system for a sheet-fed recto-verso printing press of the type comprising two printing cylinders (10, 20) for carrying out simultaneous recto-verso printing of the sheets, said sheet inspection system comprising at least one inspection device (200; 300; 400) for taking an image of one side of the printed sheets. The sheet inspection system comprises first and second transfer cylinders (60, 65) interposed between a first (10) of the two printing cylinders (10, 20) and a chain gripper system (5) of the printing press, printed sheets being transferred successively from the first printing cylinder (10) to the first transfer cylinder (60), to the second transfer cylinder (65), and to the chain gripper system (5).
    Type: Application
    Filed: March 8, 2007
    Publication date: January 29, 2009
    Applicant: KBA-GIORI S.A.
    Inventors: Johannes Georg Schaede, Volker Lohweg, Bernd Stober, Volkmar Schwitzky, Gunther Hoier
  • Patent number: 7483573
    Abstract: Signals generated by an electronic image sensor, during pattern recognition of image contents in a test piece, are evaluated. The image sensor receives an input light signal and emits an electrical output signal that correlates with the input light signal. The image content of a window, having a size of n×n pixels, is analyzed. The output signals that are either directly or indirectly emitted by the image sensor are transformed into at least one translationally invariant characteristic value by the use of at least one calculation specification. This characteristic value is weighted by at least one fuzzy matching function which correlates with the value range of the characteristic value. A higher-order fuzzy matching function is generated by linking all of the matching functions by use of a calculation specification including at least one rule. A sympathy value is determined from the higher-order fuzzy matching function. That sympathy value is compared with a threshold value.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: January 27, 2009
    Assignee: Koenig & Gauer Aktiengesellschaft
    Inventor: Volker Lohweg