US20040089727A1 - Method and apparatus for generating and decoding a visually significant barcode - Google Patents

Method and apparatus for generating and decoding a visually significant barcode Download PDF

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Publication number
US20040089727A1
US20040089727A1 US10/692,610 US69261003A US2004089727A1 US 20040089727 A1 US20040089727 A1 US 20040089727A1 US 69261003 A US69261003 A US 69261003A US 2004089727 A1 US2004089727 A1 US 2004089727A1
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Prior art keywords
barcode
image
visually significant
system
message
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Abandoned
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US10/692,610
Inventor
Izhak Baharav
Cormac Herley
Yihong Xu
Jonathan Yen
Timothy Harrison
Doron Shaked
Avraham Levy
Angela Hanson
Terry Mahoney
Original Assignee
Izhak Baharav
Cormac Herley
Yihong Xu
Jonathan Yen
Timothy Harrison
Doron Shaked
Avraham Levy
Hanson Angela K.
Mahoney Terry P.
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Priority to US09/579,070 priority Critical patent/US6751352B1/en
Application filed by Izhak Baharav, Cormac Herley, Yihong Xu, Jonathan Yen, Timothy Harrison, Doron Shaked, Avraham Levy, Hanson Angela K., Mahoney Terry P. filed Critical Izhak Baharav
Priority to US10/692,610 priority patent/US20040089727A1/en
Publication of US20040089727A1 publication Critical patent/US20040089727A1/en
Application status is Abandoned legal-status Critical

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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06037Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/12Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
    • G06K1/121Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by printing code marks
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06018Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking one-dimensional coding
    • G06K19/06028Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking one-dimensional coding using bar codes

Abstract

A barcode system for generating and decoding a barcode with visual significance. The barcode system of the present invention includes an encoding module for receiving a message and a logo and generating a visually significant barcode based on these inputs. A decoding module is also provided for receiving an acquired version of a visually significant barcode that may have been degraded in a typical document handling channel (e.g., through the printing, scanning, or copying process) and for recovering the message specified by the visually significant barcode.

Description

    FIELD OF THE INVENTION
  • The present invention relates generally to bar codes and more specifically to a method and apparatus for generating and decoding a visually significant barcode. [0001]
  • BACKGROUND OF THE INVENTION
  • Barcodes are information carrying graphical patterns designed for easy and reliable automatic retrieval. The most common barcodes are known as one-dimensional barcodes. These graphical patterns vary in a single dimension (e.g. the horizontal dimension), and are constant in the other dimension (e.g., the vertical dimension). One-dimensional barcodes are employed in low information content applications like product index registry (e.g. automatic price tagging and inventory management), or serial number registry (e.g. test-tube tagging in automated medical tests). Common examples of one-dimensional barcodes are those barcodes that are affixed or printed on the packages of items purchased at a supermarket or department store. These barcodes typically can only encode limited information, such as the price of the item and the manufacturer. The items having the barcodes are scanned at a checkout counter to facilitate the tallying up of a total receipt. [0002]
  • In order to convey more information on the same surface area, two-dimensional barcodes were developed. Two-dimensional barcodes involve intricate patterns that vary in both the horizontal and the vertical dimensions. Two-dimensional barcodes are used in applications that require more information contents. For example, two-dimensional barcodes can be used to encode mail addresses for automated mail reading and distribution systems. Mail carrier companies can use the two-dimensional bar code on shipping packages to encode shipper information, recipient information, tracking information, etc. In another example, two-dimensional barcodes can be used to encode the compressed content of a printed page to avoid the need for optical character recognition at the receiving end. [0003]
  • U.S. Pat. Nos. 5,060,980, 5,486,686, and 5,459,307 illustrate an exemplary 2D barcode system This system utilizes short black bars that have a forward orientation or a backward orientation (e.g., bars that are oriented at either 45% or 135% with respect to a reference) to render the barcode. The two possible orientations of the bar allow information (e.g., 1 or 0) to be encoded therein. This system offers a limited improvement over the traditional 2D barcode in that the appearance of these short black bars while still distracting to the human visual system is less so than the traditional 2D barcode. Consequently, it is asserted by these patents that a barcode utilizing these bars can be placed in the background of a document without excessively distracting a person reading such a document. [0004]
  • Unfortunately, the unsightly appearance of 2D bar codes relegates these bar codes to impersonal commercial and industrial setting regardless of whether the barcode less distracting and can be incorporated into the background of a document. For example, in many consumer applications, the current visually meaningless barcode patterns are prohibitive, since users are more likely to decline the benefits of the application rather than to include a “barcode” on their letterhead. [0005]
  • Another challenge in the design and use of 2D barcodes is the ability to produce barcodes by using office equipment (e.g., printers) that can be subsequently read back also using office equipment (e.g., scanners). For example, the 2D system must address printer and scanner distortions that can vary across different types and manufacturers of the office equipment. It is desirable that the 2D barcode be reliably generated and scanned regardless of the type of machine and the manufacturer of the machine. It is also desirable that the barcode be robust to photocopying (i.e., the barcode can be scanned and information embedded therein decoded from a copy of the originally rendered barcode). [0006]
  • Accordingly, there remains a need for a visually significant 2D bar code that is robust to distortions in the paper path and that overcomes the disadvantages set forth previously. [0007]
  • SUMMARY OF THE INVENTION
  • It is an object of the present invention to provide a method of generating and decoding a barcode with visual significance. [0008]
  • It is a further object of the present invention to provide a barcode pattern with visual significance that is robust to consecutive photocopying and common office document degradation. [0009]
  • It is a further object of the present invention to provide a barcode pattern with visual significance that can be printed and read by standard office equipment. [0010]
  • The barcode system of the present invention includes an encoding module for receiving a message and a logo and generating a visually significant barcode based on the se inputs. A decoding module is also provided for receiving an acquired version of a visually significant barcode that may have been degraded in a typical document handling channel (e.g., through the printing, scanning, or copying process) and for recovering the message specified by the visually significant barcode. [0011]
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a block diagram illustrating an office environment in which one embodiment of the visually significant bar code system of the present invention that does not accept user input can be implemented. [0012]
  • FIG. 2 is a block diagram illustrating an office environment in which an alternative embodiment of the visually significant bar code system of the present invention that accepts user input can be implemented. [0013]
  • FIG. 3 illustrates a logo of a picture without any user input feature and a logo of a picture having a user input feature. [0014]
  • FIG. 4A is a block diagram illustrating an office machine in which the visually significant bar code systems of FIG. 1 or FIG. 2 can be implemented. FIG. 4B is a block diagram illustrating a computer-readable medium in which the visually significant bar code systems of FIG. 1 or FIG. 2 can be implemented. [0015]
  • FIG. 5 is a block diagram illustrating in greater detail the encoding modules and the decoding modules of FIG. 1 or FIG. 2. [0016]
  • FIG. 6 illustrates a method of encoding a message into a visually significant barcode according to one embodiment of the present invention. [0017]
  • FIG. 7A illustrates an exemplary implementation of the encoding step of FIG. 6 in accordance with one embodiment of the present invention. [0018]
  • FIG. 7B illustrates pattern matrices according to one embodiment of the present invention that can be used in the encoding scheme of FIG. 7A. [0019]
  • FIG. 8 illustrates a method of decoding a visually significant bar code according to one embodiment of the present invention. [0020]
  • FIG. 9 illustrates an exemplary logo image and a corresponding visually significant barcode generated by the encoding method of the present invention. [0021]
  • FIG. 10 illustrates a zigzag scan that can be used in the decoding method of FIG. 6 to locate the barcode zone. [0022]
  • DETAILED DESCRIPTION
  • The subject invention will be described with reference to numerous details set forth below, and the accompanying drawings will illustrate th e invention. The following description and the drawings are illustrative of the invention and are not to be construed as limiting the invention. Numerous specific details are described to provide a thorough understanding of the present invention. However, in certain instances, well-known or conventional details are not described in order not to unnecessarily obscure the present invention in detail. In the drawings, the same element is labeled with the same reference numeral. [0023]
  • Visually Significant Bar Code System 10
  • FIG. 1 is a block diagram illustrating an office environment in which one embodiment of the visually significant bar code system (VSBCS) [0024] 10 of the present invention that does not accept user input can be implemented. The visually significant bar code system (VSBCS) 10 includes an encoding module 14 for generating a visually significant bar code (VSBC) 20 by utilizing a rendering technique and a decoding module 24 for decoding an acquired version 48 of a hard copy i (e.g., a first hard copy 38, a copy 54 of the first hard copy 38, or a second hard copy 56) that includes a visually significant bar code (VSBC) and for recovering a message 60 that is specified in the acquired version 48. The VSBC 20 can be rendered by utilizing rendering techniques that are well-known to those of ordinary skill in the art. In one embodiment, the VSBC 20 is rendered by utilizing a halftone algorithm to generate a halftoned VSBC 20.
  • The system [0025] 10 can communicate with a driving program 15 for providing the logo 16 and the message 18 and also communicate with a driven program 70 for utilizing the recovered message 48 for a particular application.
  • The encoding nodule [0026] 14 includes a first input for receiving a logo 16, a second input for receiving a message 18, and an output for generating the visually significant bar code (VSBC) 20. The message 18 can be any information that a system designer specifies.
  • Logo [0027] 16 can be any graphical pattern that has visual significance, which is in sharp contrast to prior 2D bar codes that do not make sense as graphical entities. For example, logo 16 can include, but is not limited to, an actual logo, graphics, a picture, text, a text box, an image, or any other pattern that has visual significance. Exemplary logos can include a company logo, an application logo, or action logo. Exemplary graphics can be frames, button marks, or background. An example of text is a text box having the words “This box contains important data!” The VSBC can be a bar code pattern that is embedded in the graphical design of text, pictures, images, borders, or the background of a document.
  • The VSBC pattern may be, but is not limited to, a binary image (e.g., a black and white dot pattern), a multi-level image (e.g., a gray-level image), or a multilevel color image that is generated by encoding module [0028] 14. The encoding module 14 is described in greater detail hereinafter with reference to FIG. 5.
  • The office environment typically includes office equipment, such as a personal computer (PC) (not shown), a printer [0029] 30 having a print engine 34, a scanner 40 having a scan engine 44, a facsimile machine (not shown), and a copier 50 for making copies of documents (e.g., copy 54). The print engine 34 receives images (e.g., halftoned images) from sources, such as the encode module 14, and renders these images to create hard copies, such as hard copy 38 with a first VSBC (L1). The scan engine 44 receives a hard copy (e.g., a hard copy 38 or 54 with a first VSBC (L1) or a second hard copy 56 with a second VSBC (L2)), generates an acquired version 48 (e.g. a scanned version) of the received hard copy, and provides the acquired version 48 to applications, such as decoding module 24. It is noted that the scanner 40 can be replaced with a digital camera for acquiring a version oft he visually significant barcode. Furthermore, the scan engine 44 can be any acquisition engine for capturing the VSBC and providing an acquired version (e.g., a digital representation) of the VSBC. The operation and construction of these office machines and their respective components are generally well known by those of ordinary skill in the art and are not described herein.
  • In a typical document-handling path, the VSBC along with the remainder of the document is provided to a printer, such as printer [0030] 30. The printer 30 then utilizes the print engine 34 to render a first hard copy 38 that includes a first VSBC (L1). The hard copy 38 may then be provided directly to a scanner, such as scanner 44, to generate a scanned version 48. Alternatively, the hard copy 38 can first be copied once or several times utilizing a copier, such as the copier 50. Thereafter, the copied version (e.g., copy 54) can be provided to the scanner 44 to generate the scanned version 48. It is noted that a second hard copy (e.g., hard copy 56) can be generated (e.g., printed or copied) by utilizing a printer (not shown) different from printer 30 that is part of a separate office. Also, it is noted that the logo 16 can vary from application to is application (e.g., first VSBC (L1) or second VSBC (L2)) and can be specified by a system designer
  • The decoding module [0031] 24 receives the acquired version 48 and recovers the message 60 encoded in the acquired version 48. For example, if the acquired version corresponds to the first hard copy 38 or to the copy 54, then the message in the first VSBC (L1) is recovered as the message 60. Alternatively, if the acquired version corresponds to the second hard copy 56 or photocopies thereof, then the message in the second VSBC (L2) is recovered as the message 60. The message 60 is then provided to a driven application 70 that performs one or more pre-determined functions or tasks, examples of which are described in greater detail hereinafter with reference to FIG. 3.
  • FIG. 2 is a block diagram illustrating an office environment in which an alternative embodiment of the visually significant bar code system [0032] 10A of the present invention that accepts user input can be implemented. This visually significant bar code system 10B is similar to the system 10A illustrated in FIG. 1, except that this system 10A is configured to accept user input. A user can input information to the first hard copy 38, the copy 54, or the second hard copy 56 in the form of marks made by using a writing utensil (e.g., a pencil or pen ) as will be explained in greater detail hereinafter with reference to FIG. 3. The system 10A includes a user input decoding module 26 for decoding the user input, such as (1) user input 64 that may be provided to the hard copy 38; or (2) user input 65 that maybe provided to the copy 54 or the second hard copy 56. It is noted that the user input decoding module 26 may be integrated with the decoding module 24 or be separate from the decoding module 24 as shown.
  • In this embodiment, the decoded user input [0033] 66 and the message 60 specified by the acquired image 48 are provided to a decision module 68 that generates one or more signals based on the user input 66 and the message 60. These signals can specify or select from one of several options provided by the message. These signals are then provided to one or more driven programs or applications 70 that perform pre-determined tasks or functions, launch other applications, or control other applications to perform the determined tasks. Examples of such task are described hereinafter with reference to FIG. 3.
  • It is noted that the driving application [0034] 15 and the driven application 70 can be the same application or different applications. Furthermore, the driving application 15 and the driven application 70 can be incorporated into the visually significant bar code system (VSBCS) 10 or be separate from the VSBC system 10.
  • FIG. 3 illustrates a logo [0035] 304 of a picture 304A without any user input feature and a logo 304B of a picture having a user input feature. A document 300 (e.g., documents 38, 54, or 56) includes a non-logo portion 302 (e.g., text, images, pictures etc.) and a logo portion 304 (e.g., first VSBC (L1) or second VSBC (L2)) that is can be a VSBC 20. It is noted that the VSBC 20 is s provided along with the non-logo portion so that a printer (e.g., the printer 30) can render the entire document 300. Since the rendering and decoding non-logo portions of documents are well known by those of ordinary skill in the art, these operations are not described herein.
  • The logo [0036] 304 can be a picture 304A without any user input feature or a picture 304B with a user input feature. In either case, the picture (304A or 304B) includes an encoded message 308 lo that can be, but is not limited to, an Internet address (e.g., a World Wide Web address), an electronic nail address, authentication information (e.g., a digital signature or the author or sender of the document), a file name and file location, a facsimile number for “fax-back” applications, or a combination thereof.
  • One aspect of the present invention is providing a VSBC to increase the value of documents and to create “living documents”. Living documents are those documents that have more information (e.g., encoded messages) than meets the eye or is apparent in viewing the documents. Living documents have encoded messages in the form of VSBCs that can be used to dynamically retrieve additional information (e.g., updated versions of the document), to reduce human intervention, to increase convenience, to improve efficiency in the office, to increase security in the distribution of documents, to increase productivity and to facilitate interaction and communication between people in the office. [0037]
  • There are numerous applications that use one or more of the types of messages, described above, and encodes these types of messages into documents. It is to be appreciated that there are many other types of messages or information that may be encoded into documents and numerous applications related thereto. The cornerstone of these applications is the VSBCS of the present invention. [0038]
  • For example, one application of the present invention is to use the VSBC to store the file name and the file location (e.g., path to access the document on a server, Web site, etc.). When a document having a VSBC that contains file and file location information is scanned into or otherwise acquired by a personal computer, a Most-Recent Document Application can utilize this information to access the most recent or updated electronic version of the document and launch the document by using a word processing application. [0039]
  • As can be appreciated, the present invention provides significant improvements over the prior art approach that would attempt to convert the scanned version into a text-editable version via some type of OCR. The OCR approach is prone to many errors and mistakes in recognition. In addition, regardless how accurate the OCR utilized, only the version as shown on the physical document can be accessed. If that document has been subsequently revised, there is no mechanism that would allow for the retrieval of the most up-to-date version. This application retrieves the most-current electronic version even if the document has poor quality text that is inadequate for recognition by prior ant OCR methods because the file name and file path are encoded in the VSBC. [0040]
  • Similarly, the encoded name and location of the original electronic version of the document, allows a copier to utilize the original document to be utilized as a copy source instead of having to rely on the document in-hand with the VSBC, which may have been severely degraded in the typical paper handling path. This is an example of a Copy-from-Electronic-Version Application. [0041]
  • A security application can utilize authentication information encoded in the VSBC for authentication purposes or other secure communication functions. For example, a digital signature can be encoded into the VSBC so that the source of the document can be authenticated. [0042]
  • In another example, the facsimile number is encoded in the VSBC so that an Automatic Fax-Back Application can utilize the encoded facsimile number to automatically dial the number when the document is fed into a facsimile machine without user intervention. Alternatively, an e-mail address may be encode d in the VSBC so that an Automatic Electronic-Mail Response Application can utilize the encoded electronic mail address to automatically send more information (e.g., a response) via e-mail to the author of the document. [0043]
  • The picture [0044] 304B with a user input feature can include one or more user input forms. For example, a Check Box Form 314 can be provided for a user to select from one of several options by simply checking the appropriate box. The text message box “Check Appropriate Box” 315 can be a visually significant barcode. In another example, a Circle Selection Form 318 can be provided for a user to select from one of several options by simply circling the appropriate selection. The text message box “Circle Desired Option” 319 can be a visually significant barcode. In yet another example, a Fill-In Form 324 can be provided for a user to fill in information requested by the form The text message box “Fill In” 325 can be a visually significant barcode.
  • Each of these forms request user input [0045] 330, such as a check mark, a circle, or text input. The user input 330 can then be decoded by the user input decode module 26 to recover the user input. Thereafter, the decision module 68 utilizes the user input in conjunction with the recovered message to select one of several available functions or tasks, and the driven application 70 for performing the selected tasks can be launched. For example, the user input can be utilized to arbitrate between different messages encoded in the different visually significant text boxes. In the automatic e-mail response application, the user input and the different visually significant text boxes can be utilized to (1) reply only to the sender or (2) to reply to all recipients including the sender.
  • The VSBC system [0046] 10 or 10A can be embodied on a media that is incorporated in office equipment (e.g., a personal computer (PC), printer, facsimile machine, scanner, copier, all-in-one machine, etc.) or separate from office equipment. When incorporated in office equipment, the media, having the VSBC system 10 or 10A embodied therein, can be in the form of a memory (e.g., random access memory (RAM), read only memory (ROM), etc.). When incorporated separate from the office equipment, the media, having VSBC system 10 or 10A embodied therein, can be in the form of a computer-readable medium, such as a floppy disk, compact disc (CD), etc.
  • FIG. 4A is a block diagram illustrating an office machine [0047] 400 in which the VSBC system 10 or 10A can be implemented. The office machine 400 includes a memory 410 in which the VSBCS 10 or 10A of the present invention can reside. The office machine 400 may be a personal computer (PC). If this is the case, the PC can be coupled to a printer, scanner, an all-in-one machine or other peripheral machine. It is noted that the VSBCS 10 or 10A may reside in the PC in the form of a driver program associated with one of these peripheral machines or can be stored in a memory that is located in the peripheral machines.
  • Alternatively, the office machine can be an all-in-one office machine (e.g., an integrated [0048] 20 scanner, printer, and facsimile machine) or any rendering machine.
  • FIG. 4B is a block diagram illustrating a computer-readable medium [0049] 420 in which the VSBC system 10 or 10A of the present invention can be implemented. The computer-readable medium 420 may be a floppy disk 440, a compact disc (CD) 430, or other computer-readable medium, etc. As can be appreciated, the VSBC system 10 or 10A can be implemented in a variety of other ways and in a variety of other components that are commonly found in an office environment.
  • FIG. 5 is a block diagram illustrating in greater detail the encoding module [0050] 14 and the decoding module 24 of FIG. 1 and FIG. 2. The encoding module 14 includes an encoder 500 for receiving a message 18 and generating an encoded message 504 based on the message 18. Encoding module 14 also includes a graphic modulation unit 510 for receiving the logo 16 and the encoded message 504 and based thereon, generates the VSBC 20. The VSBC 20 can be a specific pattern. In the channel 514, the VSBC 20 can be rendered directly on a document or incorporated into a document and rendered thereon.
  • Preferably, the visually significant two-dimensional bar codes of the present invention are graphical patterns composed, usually though not necessarily, of dots. The visually significant bar codes of the present invention are rendered, usually though not necessarily, using two-toned dots (e.g. black dots on a white background), and occupy, usually though not necessarily, a rectangular area The visually significant bar codes can incorporate various registration and fiducial marks, which are generally well known to those of ordinary skill in the art, for enabling automated identification and accurate registration of the bar code, which may be read in arbitrary orientations. In addition, the visually significant bar code system of the present invention can employ various error correcting codes, which are generally well known to those of ordinary skill in the art, for reliable automated retrieval of the bar codes. [0051]
  • The steps carried out by encoding module [0052] 14 to process the message 18 and the logo 16 to generate the VSBC 20 are described in greater detail hereinafter with reference to FIG. 6.
  • Channel [0053] 514 represents a typical office document-handling path for hard copies by standard office equipment. For example, a hard copy can be printed, photocopied, and scanned. It is understood that one or more of these standard office handling steps can be carried out by multi-functional equipment. Since the barcode pattern is subject to noise and office document s degradation (e.g., folds, stains, marks, and staples) in the channel 514, a standard cleaning process to address the noise and degradation of barcode pattern can be employed.
  • The steps carried out by the decoding module [0054] 24 to recover the message 60 from the acquired image 48 are described in greater detail hereinafter with reference to FIG. 8.
  • Generating the VSBC 20
  • FIG. 6 illustrates a method of encoding a message [0055] 18 into a visually significant barcode 20 according to one embodiment of the present invention. In step 600, the message 18 and the logo 16 are received. The message 18 can also be compressed by utilizing well known compression techniques in this step. For certain applications, such as universal resource locators (URLs), a tailored or customized compression scheme may be preferable.
  • In step [0056] 610, the compressed message is encoded by utilizing an error correction code with an output alphabet L to generate a message encoded in a sequence of Q symbols. This encoding step provides robustness to errors in the channel 514. For example, a standard 16? 31 bit BCH code that corrects for three errors, where L?4 (2 bits) can be used.
  • In step [0057] 620, the logo 16, which can be an M×N pixel image, is partitioned in a plurality of image matrices. In one example, K is equal to two (2), and M and N (i.e., the size of the logo 16) are even values (e.g., N=80 and M=40). The values of K, M and N can be modified and predetermined by a system designer to suit a particular application.
  • In step [0058] 630, an image area corresponding to R logo matrices is used for pre-defined fiducial marks. For example, the four corners of the image can be reserved for fiducial m arks. In each corner, an area of 4?4 pixels (2?2 matrices) can be designated for fiducial marks. The fiducial marks can be the whole area rendered white, except for an isolated location in each corner that is set apart or separate from adjacent matrices, which is rendered black. The upper-left fiducial mark, for example, can be all white except for the upper-left pixel, which is rendered black. It is preferable that the pattern for the fiducial mark be as robust to channel noise as possible. Since dots may be blurred or move relative to each other due to noise in the channel 514, this pattern ensures that the black fiducial dots do not merge with neighboring dots, and instead stand out clearly on a white background. Various other fiducial patterns can be utilized depending on the particular types of noise in a particular channel of interest.
  • In step [0059] 640, the remaining logo matrices (i.e., P=M×N/(K×K)−R logo matrices) are converted to K×K binary barcode matrices by utilizing one of a predefined set of L distinct maps (e.g., halftoning algorithms) based on a corresponding symbol in the coded message. In one example, there are 784 remaining image-matrices (based on N=80 and M=40) that can be ordered in raster scan. The 784 image matrices can accommodate slightly more than 25 batches of 31 matrices (Q?25?31?775). It is important to note that P should be greater than Q. Each batch codes two batches of 16 input bits: (1) one batch for the BCH MS bits, and (2) the other batch for the BCH LS bits. Thus, for the parameters specified above, the barcode can encode 25?16?2?800 bits of information.
  • FIG. 7A illustrates an exemplary implementation of encoding step [0060] 640 of FIG. 6 in accordance with one embodiment of the present invention. The logo 16 includes a plurality of pixels having one of two different gray levels: 25% and 75%. For example, pixels 704, 706 have a 25% gray level, and pixel 708 has a 75% gray level.
  • Referring to FIG. 7B, for those pixels in the logo [0061] 16 that have a 25% gray level, one of the four bar code matrices in the first row is used to render the based on the data to be encoded. For example, if the data to be encoded is “11”, pixel 704 is rendered by utilizing the bar code matrix 710. Similarly, if the data to be encoded is “01”, pixel 706 is rendered by utilizing the bar code matrix 730. Similarly, for those pixels in the logo 16 that have a 75% gray level, one of the four bar code matrices in the second row is used to render the based on the data to be encoded. For example, if the data to be encoded is “00”, pixel 708 is rendered by utilizing the bar code matrix 720.
  • Although this implementation utilizes two gray levels, 25% and 75%, it is noted that the present invention can be extended to include multiple levels can be utilized to suit a particular application. In addition, the present invention can be extended to pixels of different colors. [0062]
  • Alternatively, the remaining image-matrices can be ordered with interleaving methods that are known in the art, to provide robustness to burst-type degradations expected from stains, marks, or systematic printer/scanner distortions. The K×K binary barcode matrices can then be sent to a printer for printing onto a hard copy, such as a piece of paper. [0063]
  • There are many rendering methodologies from which one can choose the L distinct maps. For example, when halftoning algorithms are selected as the L distinct maps, there are many type of halftone methodologies one can choose from In an exemplary implementation a fixed-halftone-pattern halftoning method is utilized. This method specifies that the image be a 2-tone image. If black is 0, and white is 1, the bright tone b, and the dark tone d, are such that d?1?b. Also, the L halftoning algorithms correspond to L distinct K?K pattern-matrices, where each pattern matrix contains b?K?K black dots on white background. However, it is noted that other well-known halftoning methods, such as cluster dithering, disperse dithering (e.g., blue noise), and error diffusion methods can be utilized. When an error diffusion algorithm is employed, one can select from many different methods to diffuse the error. Similarly, when a disperse dithering algorithm is utilized, one can select from many methods to define the dither matrices (also known as screens) of various sizes. [0064]
  • Given a logo-matrix, and the selected pattern-matrix, the resulting barcode-matrix contains the pattern matrix values in the places corresponding to the bright pixels in the logo-matrix, and their complementary otherwise. [0065]
  • In this embodiment, the dots are preferably rendered as square dots at 120 dots-per-inch (dpi). It is noted that larger dots are more robust to channel degradations, but smaller dots enable more information on the same area of the paper. The dots can be rendered at a dpi higher than 120 dpi as long as acceptable error resilience can be assured. [0066]
  • It is noted that the size of the dots can be varied according to intensity. An example of varying the size of dots based on intensity is to make the black dots slightly larger than the white dots. It is also noted that the size of the dots can be varied according to neighborhood. An example of varying the size of dots based on neighborhood is to make minority colored dots larger. [0067]
  • FIG. 9 illustrates an exemplary logo [0068] 16 and message 18 that are used to generate a corresponding VSBC 20 by the encoding method of the present invention.
  • Decoding the Acquired Barcode Image 48
  • The image [0069] 48 acquired by the scanner 40 and introduced to the decoding module 24 is a degraded version of the original bar code-image. These degradations are attributed to the channel 514, namely, the printing and scanning processes, and potential office type degradations, such as copying, stains, folds, staples, and marks.
  • FIG. 8 illustrates a method of decoding a visually significant barcode according to one embodiment of the present invention. In step [0070] 800, the acquired image is received, for example, from the scanner. In step 810, the bar code image is located in the received image. For example, the received image can be a whole page of information, whereas the barcode image can be limited to a barcode zone, which may be a portion of the whole page. In one embodiment, the barcodes are located roughly at a same predetermined location in the acquired image and are surrounded by white pixels. This predetermined location is referred to herein as the barcode-zone. Alternatively, the barcodes can be disposed in varying locations on a page, as background, or as a frame for the page. When barcodes are disposed in such a manner, a barcode locating procedure can be utilized to locate the barcode image on the page.
  • In step [0071] 820, the fiducial marks are detected. The configuration of these fiducial marks indicates the type of global deformation introduced by the channel. In one embodiment, the fiducial marks are detected by using a zigzag scan.
  • FIG. 10 illustrates a zigzag scan [0072] 1000 that can be used in step 820 to detect the fiducial marks. The zigzag scan 1000 begins at the upper-left corner 1010. The first dark pixel 1020 of each scan (requires a threshold) is detected and considered to be a part of the corresponding fiducial pixel. The first dark pixel 1020 is also used as an anchor pixel for that mark (red dot in FIG. 5). Next, a flood-fill algorithm, which is known in the art, locates all the dark pixels 1030 connected to these anchors. The centers 1040 of the fiducial marks are then computed as the average (center of mass) of the pixels of each mark. An advantage of this zigzag scan is that it enables a robust detection of the an chor points even in the presence of significant rotations. This scan can be repeated at each corner of the barcode.
  • In step [0073] 830, viewing transformation distortions (e.g., translation, rotation, and affine) are corrected. By setting the center of the coordinate system to be ten pixels above and ten pixels to the left of the center of the upper-left fiducial mark, translation problems can be eliminated. The relative rotation of the center of the upper-right fiducial mark is then determined, and the image is rotated back accordingly.
  • Next, the skew factor, which is the horizontal translation of the centers of lower marks relative to the horizontal translation of the centers of the upper mark, is determined. If a skew is detected, the image is corrected for the detected skew. These transformation procedures can be implemented with standard procedures known in the computer vision and image processing areas. [0074]
  • In one embodiment, bilinear interpolation is utilized although other interpolators can be used. It is noted that a single affine transformation can be utilized to correct for both the rotation and the skew. [0075]
  • The four fiducial marks enable correction of global transformations with up to eight degrees of freedom In this embodiment, there are four degrees of freedom (two-translation, one-rotation, and one-skew). [0076]
  • In step [0077] 840, the acquired barcode image is partitioned into a plurality of sub-images that can be arranged in a rectangular array, where each sub-image corresponds to a single barcode matrix. Step 830 provides a rectangular image. In one embodiment, the step of partitioning the acquired barcode image involves the steps of measuring the image and slicing the image into rectangular sub-images. In our case M/K?20, and N/K?40 so each rectangular sub-image had the dimensions of 20?40.
  • In step [0078] 850, each sub-image is compared against the set of L possible barcode-matrices (i.e., the outputs of the L distinct maps (e.g., halftoning algorithms) given the corresponding image). When the halftone patterns of FIG. 7B are used, and the logo design is required to have a constant brightness in every logo-matrix, four vector products can be applied to every sub-image. The four vectors are Gaussian profiles that are each centered at the center of a quadrant of the sub-image. For dark sub-images, the pattern of FIG. 7B corresponds to the quadrant having the maximal value, and for bright sub-images, the pattern corresponds to the quadrant having the minimal value. This approach is also known as the matched filter approach in the image processing arts.
  • In step [0079] 860, a best match is selected to represent the sub-image in a sequence of P symbols over {1,2,?L}. It is noted that any maximum-likelihood-type of detector or any other match estimator can be utilized to determine which of the L possible maps (e.g., halftones) is the most likely to have produced the corresponding sub-image. Preferably, the best match is performed on a group of sub-images.
  • In step [0080] 870, the (possibly erroneous) sequence that was originally coded with an error-correcting code is decoded, thereby eliminating the effect of possible errors due to the degradations of the channel. The corresponding standard BCH error correction may be performed followed by the appropriate re-ordering of the bits.
  • In step [0081] 880, the sequence is decompressed to give the original message.
  • The present invention provides a barcode pattern with visual significance, thereby increasing its acceptance and use in the business environment and even the home environment. Whereas the prior art bar codes were limited to impersonal commercial and industrial applications, the barcode pattern of the present invention with visual significance changes the sentimental value attached the use of barcodes in more personal contexts from unfavorable to favorable. [0082]
  • In addition, different applications can easily incorporate the visually significant barcode pattern of the present invention and different variations thereof (e.g., different logos or other graphics), thereby enabling a user to customize or personalize the barcode pattern. [0083]
  • Moreover, the present invention utilizes techniques, such as error correct ion and the use of fiducial marks, to make the visually significant barcode pattern of the present invention robust to imperfections and noise in the hardcopy-handling channel. For example, the barcode pattern of is the present invention is robust to consecutive photocopying by common office copiers (e.g., analog and digital copiers). Also, the barcode pattern of the present invention is resilient to common office document degradations, such as folds, stains, marks, and staples. [0084]
  • Furthermore, the visually significant barcode pattern of the present invention can be printed by and read by standard office equipment, such as printers, scanners, copiers, and multi-functional equipment. [0085]
  • The foregoing description has provided numerous examples of the present invention. It will be appreciated that various modifications and changes may be made thereto without departing from the broader scope of the invention as set forth in the appended claims. [0086]

Claims (21)

What is claimed is:
1. A visually significant barcode system comprising:
an encoding module for receiving a message and a logo and based thereon for generating a visually significant barcode having the message encoded therein.
2. The visually significant barcode system of claim 1 further comprising:
a print engine coupled to the encoding module for receiving the visually significant barcode and based thereon for rendering a hard copy of the visually significant barcode.
3. The visually significant barcode system of claim 2 wherein the
print engine utilizes a halftone algorithm to render the hard copy of the visually significant barcode.
4. The visually significant barcode system of claim 1 further comprising:
a decoding module for receiving an acquired version of the visually significant barcode and based thereon for recovering a message encoded therein.
5. The visually significant barcode system of claim 4 further comprising:
an acquisition engine coupled to the decoding module for receiving a hard copy having a visually significant barcode, and based thereon, for generating the acquired version of the visually significant barcode.
6. The barcode system of claim 4 wherein the encoding module and the decoding module are embodied on a media.
7. The barcode system of claim 6 wherein the media is incorporated in an office machine in the form of a memory.
8. The barcode system of claim 7 wherein the office machine is one of a personal computer, an all-in-one office machine, a printer, and a scanner.
9. The barcode system of claim 6 wherein the media is a computer readable medium
10. The barcode system of claim 9 wherein the computer readable medium is one of a floppy disk and a compact disc.
11. The barcode system of claim 1 wherein the message is one of an electronic mail address, a uniform resource locator web address, authentication information, a facsimile number, and a file name and location.
12. The barcode system of claim 1 wherein the logo includes a user input feature for allowing a user to provide information.
13. The barcode system of claim 12 wherein the user input feature is one of a circle selection form, check box form, and fill-in form
14. The barcode system of claim 1 wherein the visually significant barcode is utilized in one of an automatic fax-back application, an automatic email-back application, copy from electronic version application, and a most-recent document application.
15. A method for generating a visually significant barcode comprising:
receiving an M×N pixel image;
receiving a message having a plurality of fields;
partitioning the M×N pixel image into a plurality of K×K image matrices; and
converting the K×K image matrices to K×K barcode matrices by utilizing one of a predetermined set of L distinct maps; wherein the selection of the particular map is based on a corresponding field of the message.
16. The method as in claim 15 wherein the pixel image is one of a black and white image, a color image, and a gray-level image.
17. The method as in claim 15 wherein the barcode matrices are multi-level barcode mat rices that includes one of gray level barcode matrices and color barcode matrices.
18. The method as in claim 15 further comprising:
defining an image area for predetermined fiducial marks.
19. The method as in claim 15 wherein the predetermined set of L distinct maps includes a predetermined set of halftoning algorithms that can be one of cluster dithering, disperse dithering, and error diffusion.
20. A method for decoding a visually significant barcode comprising:
receiving the barcode image;
partitioning the barcode image into a plurality of sub-images;
comparing each sub-image with a set of L possible barcode matrices; and
decoding a message based on a match estimation of each sub-image to each one of the L possible barcode matrices in a sequence of P symbols over {1, 2, . . . L}.
21. The method as in claim 20 further comprising:
receiving an image having a barcode image; and
locating the barcode image in the received image.
US10/692,610 2000-05-25 2003-10-24 Method and apparatus for generating and decoding a visually significant barcode Abandoned US20040089727A1 (en)

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050274804A1 (en) * 2004-06-14 2005-12-15 Fuji Photo Film Co., Ltd. Barcode creation apparatus, barcode creation method and program
US20050283448A1 (en) * 2004-06-22 2005-12-22 Dixon Kyle M Method and system for providing a barcode image over a network
US20060196950A1 (en) * 2005-02-16 2006-09-07 Han Kiliccote Method and system for creating and using redundant and high capacity barcodes
US20060210192A1 (en) * 2005-03-17 2006-09-21 Symagery Microsystems Inc. Automatic perspective distortion detection and correction for document imaging
US20070192335A1 (en) * 2006-01-31 2007-08-16 Yuuko Sugiura Data processing apparatus, data processing method, and computer-readable recording medium
US20080037899A1 (en) * 2006-08-14 2008-02-14 Xerox Corporation Image manipulation
US20080300062A1 (en) * 2004-06-04 2008-12-04 Mattel, Inc. Electronic Device for Enhancing an Interactive Experience with a Tangible Medium of Expression
US20090028453A1 (en) * 2007-07-27 2009-01-29 Hewlett-Packard Development Company, L.P. Content Encoder and Decoder and Methods of Encoding and Decoding Content
US7578436B1 (en) 2004-11-08 2009-08-25 Pisafe, Inc. Method and apparatus for providing secure document distribution
US20100044445A1 (en) * 2005-12-16 2010-02-25 Pisafe Method and System for Creating and Using Barcodes
US20120061469A1 (en) * 2010-09-15 2012-03-15 Fuji Xerox Co., Ltd. Image processing apparatus, identification apparatus, electronic writing instrument, method for determining bit sequence and computer readable medium
US20120200710A1 (en) * 2009-10-16 2012-08-09 Toshitaka Nakajima Prismatic retroreflective sheeting with reduced retroreflectivity of infra-red light
US8540141B2 (en) 2008-08-04 2013-09-24 Roche Diagnostics Operations, Inc. Encoding method for encoding medical items
US20140231504A1 (en) * 2011-09-30 2014-08-21 Stephen M. DeRoos Decision device and method thereof
US20140239072A1 (en) * 2013-02-28 2014-08-28 International Business Machines Corporation Automatically Converting a Sign and Method for Automatically Reading a Sign
US20150060551A1 (en) * 2012-03-30 2015-03-05 3M Innovative Ropertiecompany Retroreflective articles having a machine-readable code
US9170874B2 (en) 2012-07-17 2015-10-27 Hewlett-Packard Development Company, L.P. Providing a potential solution
US9581740B2 (en) 2008-12-15 2017-02-28 3M Innovative Properties Company Optically active materials and articles and systems in which they may be used
US9937879B2 (en) 2009-10-08 2018-04-10 3M Innovative Properties Company High contrast retroreflective sheeting and license plates
US20180268369A1 (en) * 2017-03-16 2018-09-20 Sarwar PEDAWI Global address system and method

Families Citing this family (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7387253B1 (en) 1996-09-03 2008-06-17 Hand Held Products, Inc. Optical reader system comprising local host processor and optical reader
US6938017B2 (en) * 2000-12-01 2005-08-30 Hewlett-Packard Development Company, L.P. Scalable, fraud resistant graphical payment indicia
US7075676B2 (en) * 2000-12-19 2006-07-11 Sharp Laboratories Of America, Inc. Method for attaching file as a barcode to the printout
US7028009B2 (en) * 2001-01-17 2006-04-11 Contentguardiholdings, Inc. Method and apparatus for distributing enforceable property rights
JP4759844B2 (en) * 2001-05-18 2011-08-31 ソニー株式会社 Information providing apparatus and method, an information processing apparatus and method, recording medium, and program
US7386129B2 (en) * 2001-05-30 2008-06-10 Digeo, Inc. System and method for multimedia content simulcast
US7093277B2 (en) * 2001-05-30 2006-08-15 Digeo, Inc. System and method for improved multi-stream multimedia transmission and processing
WO2003006257A1 (en) * 2001-07-11 2003-01-23 Ecole Polytechnique Federale De Lausanne Images incorporating microstructures
US7463737B2 (en) 2001-08-15 2008-12-09 Digeo, Inc. System and method for conditional access key encryption
AT376219T (en) * 2001-12-05 2007-11-15 Rodenstock Gmbh A method for marking of articles ligand
US6915020B2 (en) * 2001-12-19 2005-07-05 Hewlett-Packard Development Company, L.P. Generating graphical bar codes by halftoning with embedded graphical encoding
JP2005515559A (en) * 2002-01-21 2005-05-26 バロール デンマーク アクティーゼルスカブ How to register to identify the accepted items before storing in factory stock
US7206431B2 (en) * 2002-02-22 2007-04-17 Symbol Technologies, Inc. System and method for generating and verifying a self-authenticating document
US7028902B2 (en) 2002-10-03 2006-04-18 Hewlett-Packard Development Company, L.P. Barcode having enhanced visual quality and systems and methods thereof
US7502507B2 (en) 2002-10-31 2009-03-10 Microsoft Corporation Active embedded interaction code
US7009594B2 (en) 2002-10-31 2006-03-07 Microsoft Corporation Universal computing device
US7430497B2 (en) 2002-10-31 2008-09-30 Microsoft Corporation Statistical model for global localization
US7116840B2 (en) 2002-10-31 2006-10-03 Microsoft Corporation Decoding and error correction in 2-D arrays
US7133563B2 (en) * 2002-10-31 2006-11-07 Microsoft Corporation Passive embedded interaction code
JP4181881B2 (en) * 2003-01-22 2008-11-19 キヤノン株式会社 An image processing apparatus and method
US7274831B2 (en) 2003-04-03 2007-09-25 Microsoft Corporation High quality anti-aliasing
EP1668446A2 (en) * 2003-09-05 2006-06-14 Oliver Foehr Method, device and system for a machine-readable code enabled device enabling e-commerce transactions
US8363282B2 (en) 2003-10-31 2013-01-29 Hewlett-Packard Development Company, L.P. Halftone screening and bitmap based encoding of information in images
JP4534561B2 (en) * 2004-04-13 2010-09-01 株式会社日立製作所 Reliability determination method of printed material
US7304585B2 (en) * 2004-07-02 2007-12-04 Nokia Corporation Initiation of actions with compressed action language representations
US20060064308A1 (en) * 2004-09-02 2006-03-23 Oliver Foehr Method, device and system for a machine-readable code enabled device enabling E-commerce transactions
EP1653395A3 (en) 2004-10-01 2006-05-10 Axalto SA Protection method for a portable personal object
KR100636197B1 (en) * 2004-11-26 2006-10-19 삼성전자주식회사 Method and apparatus for printing image using barcode firmware information
US7826074B1 (en) 2005-02-25 2010-11-02 Microsoft Corporation Fast embedded interaction code printing with custom postscript commands
US7421439B2 (en) 2005-04-22 2008-09-02 Microsoft Corporation Global metadata embedding and decoding
US7400777B2 (en) 2005-05-25 2008-07-15 Microsoft Corporation Preprocessing for information pattern analysis
US7729539B2 (en) 2005-05-31 2010-06-01 Microsoft Corporation Fast error-correcting of embedded interaction codes
US7817816B2 (en) 2005-08-17 2010-10-19 Microsoft Corporation Embedded interaction code enabled surface type identification
US7747544B2 (en) * 2005-12-07 2010-06-29 Pitney Bowes Inc. Meter tape with location indicator used for unique identification
US7909256B2 (en) * 2005-12-31 2011-03-22 Motorola Mobility, Inc. Method and system for automatically focusing a camera
US8150163B2 (en) * 2006-04-12 2012-04-03 Scanbuy, Inc. System and method for recovering image detail from multiple image frames in real-time
US8166003B2 (en) * 2006-05-05 2012-04-24 Microsoft Corporation Permission-based document server
WO2008079748A1 (en) * 2006-12-20 2008-07-03 Cytyc Corporation Method and system for locating and focusing on fiducial marks on specimen slides
JP5257568B2 (en) * 2007-07-20 2013-08-07 富士ゼロックス株式会社 Image forming apparatus, an image forming system and an image forming program
US9734442B2 (en) 2007-10-31 2017-08-15 Ncr Corporation LumID barcode format
US8086502B2 (en) * 2008-03-31 2011-12-27 Ebay Inc. Method and system for mobile publication
US8825660B2 (en) * 2009-03-17 2014-09-02 Ebay Inc. Image-based indexing in a network-based marketplace
JP4629788B1 (en) 2009-11-20 2011-02-09 進 辻 Article display code is attached, the display code generating apparatus and information transmission method
US8430301B2 (en) * 2009-11-23 2013-04-30 Konica Minolta Laboratory U.S.A., Inc. Document authentication using hierarchical barcode stamps to detect alterations of barcode
US8593697B2 (en) * 2010-01-11 2013-11-26 Hewlett-Packard Development Company, L.P. Document processing
US9367776B2 (en) 2011-06-22 2016-06-14 Hewlett-Packard Development Company, L.P. Systems and methods for tracing the source of printed pages
US8632013B2 (en) * 2011-08-09 2014-01-21 Intellectual Ventures Fund 83 Llc Information retrieval using decoded machine-readable optical codes
US8948445B2 (en) 2012-05-03 2015-02-03 The Hong Kong University Of Science And Technology Embedding visual information in a two-dimensional bar code
US9454721B2 (en) * 2012-07-30 2016-09-27 Hewlett-Packard Development Company, L.P. Document copy with data-bearing halftone image
CN104525487B (en) * 2014-12-29 2016-11-02 施展 Smart one kind of course of post private information to protect the confidentiality of postal transceiver and its working methods

Citations (77)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4637051A (en) * 1983-07-18 1987-01-13 Pitney Bowes Inc. System having a character generator for printing encrypted messages
US4777357A (en) * 1985-11-11 1988-10-11 Hitachi, Ltd. Bar code reader
US4822986A (en) * 1987-04-17 1989-04-18 Recognition Equipment Incorporated Method of detecting and reading postal bar codes
US4901073A (en) * 1986-12-04 1990-02-13 Regent Of The University Of California Encoder for measuring the absolute position of moving elements
US4924078A (en) * 1987-11-25 1990-05-08 Sant Anselmo Carl Identification symbol, system and method
US5060980A (en) * 1990-05-30 1991-10-29 Xerox Corporation Form utilizing encoded indications for form field processing
US5075862A (en) * 1989-12-26 1991-12-24 Pitney Bowes Inc. System for printing value indicia with diagrammatic data representation
US5091966A (en) * 1990-07-31 1992-02-25 Xerox Corporation Adaptive scaling for decoding spatially periodic self-clocking glyph shape codes
US5120940A (en) * 1990-08-10 1992-06-09 The Boeing Company Detection of barcodes in binary images with arbitrary orientation
US5195123A (en) * 1988-11-23 1993-03-16 Clement Richard J Radiograph identification method and device
US5315098A (en) * 1990-12-27 1994-05-24 Xerox Corporation Methods and means for embedding machine readable digital data in halftone images
US5337361A (en) * 1990-01-05 1994-08-09 Symbol Technologies, Inc. Record with encoded data
US5339170A (en) * 1991-12-31 1994-08-16 Xerox Corporation Image processing system and method employing hybrid filtering to provide improved reconstruction of continuous tone images from halftone screen-structured images
US5459307A (en) * 1993-11-30 1995-10-17 Xerox Corporation System for storage and retrieval of digitally encoded information on a medium
US5486686A (en) * 1990-05-30 1996-01-23 Xerox Corporation Hardcopy lossless data storage and communications for electronic document processing systems
US5513563A (en) * 1994-11-14 1996-05-07 Pitney Bowes Inc. Indicia security via variable dot size
US5523552A (en) * 1994-10-19 1996-06-04 Symbol Technologies, Inc. Method and apparatus to scan randomly oriented two-dimensional bar code symbols
US5527407A (en) * 1992-12-30 1996-06-18 The Goodyear Tire & Rubber Company Apparatus and method for marking a rubber article with a message readable by a light scanning device
US5541396A (en) * 1991-07-19 1996-07-30 Rentsch; Frederic Method of representing binary data
US5550365A (en) * 1992-08-10 1996-08-27 United Parcel Service Of America, Inc. Method and apparatus for decoding bar code symbols using subpixel interpolation
US5591956A (en) * 1995-05-15 1997-01-07 Welch Allyn, Inc. Two dimensional data encoding structure and symbology for use with optical readers
US5644408A (en) * 1990-01-05 1997-07-01 Symbol Technologies, Inc. Apparatus for processing human-readable and machine-readable documents
US5661284A (en) * 1995-03-13 1997-08-26 Albert J. Freeman Commercial transaction system
US5682030A (en) * 1993-02-02 1997-10-28 Label Vision Systems Inc Method and apparatus for decoding bar code data from a video signal and application thereof
US5706099A (en) * 1995-06-05 1998-01-06 Xerox Corporation Method and apparatus for generating serpentine halftone images
US5710814A (en) * 1996-07-23 1998-01-20 Cheyenne Property Trust Cryptographic unit touch point logic
US5710636A (en) * 1995-06-05 1998-01-20 Xerox Corporation Method and apparatus for generating halftone images having human readable patterns formed therein
US5778076A (en) * 1994-01-03 1998-07-07 E-Stamp Corporation System and method for controlling the dispensing of an authenticating indicia
US5790703A (en) * 1997-01-21 1998-08-04 Xerox Corporation Digital watermarking using conjugate halftone screens
US5799112A (en) * 1996-08-30 1998-08-25 Xerox Corporation Method and apparatus for wavelet-based universal halftone image unscreening
US5801944A (en) * 1995-10-11 1998-09-01 E-Stamp Corporation System and method for printing postage indicia directly on documents
US5819240A (en) * 1995-10-11 1998-10-06 E-Stamp Corporation System and method for generating personalized postage indica
US5818970A (en) * 1991-04-26 1998-10-06 Canon Kabushiki Kaisha Image encoding apparatus
US5835615A (en) * 1997-03-24 1998-11-10 Synex Bar code printability gauge
US5866895A (en) * 1994-12-16 1999-02-02 Olympus Optical Co., Ltd. Information recording medium and information reproduction system
US5871288A (en) * 1996-12-24 1999-02-16 Pitney Bowes Inc. Method for customer selectable module size for an information based indicia
US5880451A (en) * 1997-04-24 1999-03-09 United Parcel Service Of America, Inc. System and method for OCR assisted bar code decoding
US5897669A (en) * 1995-09-20 1999-04-27 Olympus Optical Co., Ltd. Information recording medium for recording multimedia information as optical readable code data thereon and information recording/reproducing system using the same
US5898166A (en) * 1995-05-23 1999-04-27 Olympus Optical Co., Ltd. Information reproduction system which utilizes physical information on an optically-readable code and which optically reads the code to reproduce multimedia information
US5912745A (en) * 1992-10-15 1999-06-15 Digital Equipment Corporation Void and cluster apparatus and method for generating dither templates
US5946415A (en) * 1996-10-24 1999-08-31 The United States Of America As Represented By The Secretary Of The Army Method and apparatus to process drawing images
US5946414A (en) * 1998-08-28 1999-08-31 Xerox Corporation Encoding data in color images using patterned color modulated image regions
US5947200A (en) * 1997-09-25 1999-09-07 Atlantic Richfield Company Method for fracturing different zones from a single wellbore
US5953426A (en) * 1997-02-11 1999-09-14 Francotyp-Postalia Ag & Co. Method and arrangement for generating and checking a security imprint
US5974147A (en) * 1996-11-07 1999-10-26 Pitney Bowes Inc. Method of verifying unreadable indicia for an information-based indicia program
US5982896A (en) * 1996-12-23 1999-11-09 Pitney Bowes Inc. System and method of verifying cryptographic postage evidencing using a fixed key set
US5996893A (en) * 1997-10-28 1999-12-07 Eastman Kodak Company Method and apparatus for visually identifying an area on a photograph or image where digital data is stored
US6032861A (en) * 1995-01-03 2000-03-07 Lemelson; Jerome H. Method and apparatus for encoding and decoding bar codes with primary and secondary information and method of using such bar codes
US6064764A (en) * 1998-03-30 2000-05-16 Seiko Epson Corporation Fragile watermarks for detecting tampering in images
US6064738A (en) * 1996-12-10 2000-05-16 The Research Foundation Of State University Of New York Method for encrypting and decrypting data using chaotic maps
US6116510A (en) * 1997-05-16 2000-09-12 Olympus Optical Co., Ltd. Code reading and recording apparatus
US6141450A (en) * 1998-01-09 2000-10-31 Winbond Electronics Corporation Image compression system using halftoning and inverse halftoning to produce base and difference layers while minimizing mean square errors
US6141441A (en) * 1998-09-28 2000-10-31 Xerox Corporation Decoding data from patterned color modulated image regions in a color image
US6151590A (en) * 1995-12-19 2000-11-21 Pitney Bowes Inc. Network open metering system
US6175827B1 (en) * 1998-03-31 2001-01-16 Pitney Bowes Inc. Robus digital token generation and verification system accommodating token verification where addressee information cannot be recreated automated mail processing
US6193158B1 (en) * 1996-06-03 2001-02-27 Accu-Sort Systems, Inc. High speed image acquisition system and method
US6201901B1 (en) * 1998-06-01 2001-03-13 Matsushita Electronic Industrial Co., Ltd. Border-less clock free two-dimensional barcode and method for printing and reading the same
US6212504B1 (en) * 1998-01-12 2001-04-03 Unisys Corporation Self-authentication of value documents using encoded indices
US6240196B1 (en) * 1998-12-18 2001-05-29 Pitney Bowes Inc. Mail generation system with enhanced security by use of modified print graphic information
US6240212B1 (en) * 1997-06-19 2001-05-29 Samsung Electronics Co., Ltd. Scan interleaving method
US6252675B1 (en) * 1998-05-08 2001-06-26 Xerox Corporation Apparatus and method for halftone hybrid screen generation
US6256398B1 (en) * 1998-08-22 2001-07-03 Kenneth H. P. Chang Encoding and decoding a message within an image
US6263086B1 (en) * 1998-04-15 2001-07-17 Xerox Corporation Automatic detection and retrieval of embedded invisible digital watermarks from halftone images
US6311214B1 (en) * 1995-07-27 2001-10-30 Digimarc Corporation Linking of computers based on optical sensing of digital data
US20010047476A1 (en) * 2000-05-25 2001-11-29 Jonathan Yen Authenticatable graphical bar codes
US6345104B1 (en) * 1994-03-17 2002-02-05 Digimarc Corporation Digital watermarks and methods for security documents
US6364209B1 (en) * 1999-02-17 2002-04-02 Olympus Optical Co., Ltd. Data reading apparatus
US6373587B1 (en) * 2000-05-19 2002-04-16 Pitney Bowes Inc. Method for printing electronic tickets
US6398117B1 (en) * 2000-01-14 2002-06-04 Hewlett-Packard Co. Method and system for combining bar codes of different encoding dimensions
US6427021B1 (en) * 1998-12-02 2002-07-30 Pitney Bowes Inc. Recording graphical and tracking information on the face of a mailpiece
US6430302B2 (en) * 1993-11-18 2002-08-06 Digimarc Corporation Steganographically encoding a first image in accordance with a second image
US6457651B2 (en) * 1999-10-01 2002-10-01 Xerox Corporation Dual mode, dual information, document bar coding and reading system
US6470096B2 (en) * 1998-11-13 2002-10-22 Xerox Corporation Method for locating user interface tags in a document processing system
US6493110B1 (en) * 2000-04-05 2002-12-10 Gregory B. Roberts System and method for bar code rendering and recognition
US6510997B1 (en) * 1993-11-24 2003-01-28 Metrologic Instruments, Inc. Hand-supportable bar code symbol reading device having an integrated world wide web (www) browser command generator for automatically generating www browser program commands to initiate the execution of hyper-text transmission protocol (http) requests
US6526155B1 (en) * 1999-11-24 2003-02-25 Xerox Corporation Systems and methods for producing visible watermarks by halftoning
US6611623B2 (en) * 1998-07-31 2003-08-26 Sony Corporation Information processing apparatus, an information processing method and a medium

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10198774A (en) * 1997-01-09 1998-07-31 Olympus Optical Co Ltd Medium and device for information recording
US5974200A (en) 1997-03-20 1999-10-26 Matsushita Electric Industrial Company, Ltd. Method of locating a machine readable two dimensional barcode within an image

Patent Citations (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4637051A (en) * 1983-07-18 1987-01-13 Pitney Bowes Inc. System having a character generator for printing encrypted messages
US4777357A (en) * 1985-11-11 1988-10-11 Hitachi, Ltd. Bar code reader
US4901073A (en) * 1986-12-04 1990-02-13 Regent Of The University Of California Encoder for measuring the absolute position of moving elements
US4822986A (en) * 1987-04-17 1989-04-18 Recognition Equipment Incorporated Method of detecting and reading postal bar codes
US4924078A (en) * 1987-11-25 1990-05-08 Sant Anselmo Carl Identification symbol, system and method
US5195123A (en) * 1988-11-23 1993-03-16 Clement Richard J Radiograph identification method and device
US5075862A (en) * 1989-12-26 1991-12-24 Pitney Bowes Inc. System for printing value indicia with diagrammatic data representation
US5337361A (en) * 1990-01-05 1994-08-09 Symbol Technologies, Inc. Record with encoded data
US5337361C1 (en) * 1990-01-05 2001-05-15 Symbol Technologies Inc Record with encoded data
US5644408A (en) * 1990-01-05 1997-07-01 Symbol Technologies, Inc. Apparatus for processing human-readable and machine-readable documents
US5486686A (en) * 1990-05-30 1996-01-23 Xerox Corporation Hardcopy lossless data storage and communications for electronic document processing systems
US5060980A (en) * 1990-05-30 1991-10-29 Xerox Corporation Form utilizing encoded indications for form field processing
US5091966A (en) * 1990-07-31 1992-02-25 Xerox Corporation Adaptive scaling for decoding spatially periodic self-clocking glyph shape codes
US5120940A (en) * 1990-08-10 1992-06-09 The Boeing Company Detection of barcodes in binary images with arbitrary orientation
US5315098A (en) * 1990-12-27 1994-05-24 Xerox Corporation Methods and means for embedding machine readable digital data in halftone images
US5818970A (en) * 1991-04-26 1998-10-06 Canon Kabushiki Kaisha Image encoding apparatus
US5541396A (en) * 1991-07-19 1996-07-30 Rentsch; Frederic Method of representing binary data
US5339170A (en) * 1991-12-31 1994-08-16 Xerox Corporation Image processing system and method employing hybrid filtering to provide improved reconstruction of continuous tone images from halftone screen-structured images
US5550365A (en) * 1992-08-10 1996-08-27 United Parcel Service Of America, Inc. Method and apparatus for decoding bar code symbols using subpixel interpolation
US6172773B1 (en) * 1992-10-15 2001-01-09 Compaq Computer Corporation Void and cluster apparatus and method for generating dither templates
US5912745A (en) * 1992-10-15 1999-06-15 Digital Equipment Corporation Void and cluster apparatus and method for generating dither templates
US5527407A (en) * 1992-12-30 1996-06-18 The Goodyear Tire & Rubber Company Apparatus and method for marking a rubber article with a message readable by a light scanning device
US5682030A (en) * 1993-02-02 1997-10-28 Label Vision Systems Inc Method and apparatus for decoding bar code data from a video signal and application thereof
US6430302B2 (en) * 1993-11-18 2002-08-06 Digimarc Corporation Steganographically encoding a first image in accordance with a second image
US6510997B1 (en) * 1993-11-24 2003-01-28 Metrologic Instruments, Inc. Hand-supportable bar code symbol reading device having an integrated world wide web (www) browser command generator for automatically generating www browser program commands to initiate the execution of hyper-text transmission protocol (http) requests
US5459307A (en) * 1993-11-30 1995-10-17 Xerox Corporation System for storage and retrieval of digitally encoded information on a medium
US5778076A (en) * 1994-01-03 1998-07-07 E-Stamp Corporation System and method for controlling the dispensing of an authenticating indicia
US6345104B1 (en) * 1994-03-17 2002-02-05 Digimarc Corporation Digital watermarks and methods for security documents
US5523552A (en) * 1994-10-19 1996-06-04 Symbol Technologies, Inc. Method and apparatus to scan randomly oriented two-dimensional bar code symbols
US5513563A (en) * 1994-11-14 1996-05-07 Pitney Bowes Inc. Indicia security via variable dot size
US5866895A (en) * 1994-12-16 1999-02-02 Olympus Optical Co., Ltd. Information recording medium and information reproduction system
US6032861A (en) * 1995-01-03 2000-03-07 Lemelson; Jerome H. Method and apparatus for encoding and decoding bar codes with primary and secondary information and method of using such bar codes
US5661284A (en) * 1995-03-13 1997-08-26 Albert J. Freeman Commercial transaction system
US5591956A (en) * 1995-05-15 1997-01-07 Welch Allyn, Inc. Two dimensional data encoding structure and symbology for use with optical readers
US5898166A (en) * 1995-05-23 1999-04-27 Olympus Optical Co., Ltd. Information reproduction system which utilizes physical information on an optically-readable code and which optically reads the code to reproduce multimedia information
US5710636A (en) * 1995-06-05 1998-01-20 Xerox Corporation Method and apparatus for generating halftone images having human readable patterns formed therein
US5706099A (en) * 1995-06-05 1998-01-06 Xerox Corporation Method and apparatus for generating serpentine halftone images
US6311214B1 (en) * 1995-07-27 2001-10-30 Digimarc Corporation Linking of computers based on optical sensing of digital data
US5897669A (en) * 1995-09-20 1999-04-27 Olympus Optical Co., Ltd. Information recording medium for recording multimedia information as optical readable code data thereon and information recording/reproducing system using the same
US5819240A (en) * 1995-10-11 1998-10-06 E-Stamp Corporation System and method for generating personalized postage indica
US5801944A (en) * 1995-10-11 1998-09-01 E-Stamp Corporation System and method for printing postage indicia directly on documents
US6151590A (en) * 1995-12-19 2000-11-21 Pitney Bowes Inc. Network open metering system
US6193158B1 (en) * 1996-06-03 2001-02-27 Accu-Sort Systems, Inc. High speed image acquisition system and method
US5710814A (en) * 1996-07-23 1998-01-20 Cheyenne Property Trust Cryptographic unit touch point logic
US5799112A (en) * 1996-08-30 1998-08-25 Xerox Corporation Method and apparatus for wavelet-based universal halftone image unscreening
US5946415A (en) * 1996-10-24 1999-08-31 The United States Of America As Represented By The Secretary Of The Army Method and apparatus to process drawing images
US5974147A (en) * 1996-11-07 1999-10-26 Pitney Bowes Inc. Method of verifying unreadable indicia for an information-based indicia program
US6064738A (en) * 1996-12-10 2000-05-16 The Research Foundation Of State University Of New York Method for encrypting and decrypting data using chaotic maps
US5982896A (en) * 1996-12-23 1999-11-09 Pitney Bowes Inc. System and method of verifying cryptographic postage evidencing using a fixed key set
US5871288A (en) * 1996-12-24 1999-02-16 Pitney Bowes Inc. Method for customer selectable module size for an information based indicia
US5790703A (en) * 1997-01-21 1998-08-04 Xerox Corporation Digital watermarking using conjugate halftone screens
US5953426A (en) * 1997-02-11 1999-09-14 Francotyp-Postalia Ag & Co. Method and arrangement for generating and checking a security imprint
US5835615A (en) * 1997-03-24 1998-11-10 Synex Bar code printability gauge
US5880451A (en) * 1997-04-24 1999-03-09 United Parcel Service Of America, Inc. System and method for OCR assisted bar code decoding
US6116510A (en) * 1997-05-16 2000-09-12 Olympus Optical Co., Ltd. Code reading and recording apparatus
US6240212B1 (en) * 1997-06-19 2001-05-29 Samsung Electronics Co., Ltd. Scan interleaving method
US5947200A (en) * 1997-09-25 1999-09-07 Atlantic Richfield Company Method for fracturing different zones from a single wellbore
US5996893A (en) * 1997-10-28 1999-12-07 Eastman Kodak Company Method and apparatus for visually identifying an area on a photograph or image where digital data is stored
US6141450A (en) * 1998-01-09 2000-10-31 Winbond Electronics Corporation Image compression system using halftoning and inverse halftoning to produce base and difference layers while minimizing mean square errors
US6212504B1 (en) * 1998-01-12 2001-04-03 Unisys Corporation Self-authentication of value documents using encoded indices
US6064764A (en) * 1998-03-30 2000-05-16 Seiko Epson Corporation Fragile watermarks for detecting tampering in images
US6175827B1 (en) * 1998-03-31 2001-01-16 Pitney Bowes Inc. Robus digital token generation and verification system accommodating token verification where addressee information cannot be recreated automated mail processing
US6263086B1 (en) * 1998-04-15 2001-07-17 Xerox Corporation Automatic detection and retrieval of embedded invisible digital watermarks from halftone images
US6252675B1 (en) * 1998-05-08 2001-06-26 Xerox Corporation Apparatus and method for halftone hybrid screen generation
US6201901B1 (en) * 1998-06-01 2001-03-13 Matsushita Electronic Industrial Co., Ltd. Border-less clock free two-dimensional barcode and method for printing and reading the same
US6611623B2 (en) * 1998-07-31 2003-08-26 Sony Corporation Information processing apparatus, an information processing method and a medium
US6256398B1 (en) * 1998-08-22 2001-07-03 Kenneth H. P. Chang Encoding and decoding a message within an image
US5946414A (en) * 1998-08-28 1999-08-31 Xerox Corporation Encoding data in color images using patterned color modulated image regions
US6141441A (en) * 1998-09-28 2000-10-31 Xerox Corporation Decoding data from patterned color modulated image regions in a color image
US6470096B2 (en) * 1998-11-13 2002-10-22 Xerox Corporation Method for locating user interface tags in a document processing system
US6427021B1 (en) * 1998-12-02 2002-07-30 Pitney Bowes Inc. Recording graphical and tracking information on the face of a mailpiece
US6240196B1 (en) * 1998-12-18 2001-05-29 Pitney Bowes Inc. Mail generation system with enhanced security by use of modified print graphic information
US6364209B1 (en) * 1999-02-17 2002-04-02 Olympus Optical Co., Ltd. Data reading apparatus
US6457651B2 (en) * 1999-10-01 2002-10-01 Xerox Corporation Dual mode, dual information, document bar coding and reading system
US6526155B1 (en) * 1999-11-24 2003-02-25 Xerox Corporation Systems and methods for producing visible watermarks by halftoning
US6398117B1 (en) * 2000-01-14 2002-06-04 Hewlett-Packard Co. Method and system for combining bar codes of different encoding dimensions
US6493110B1 (en) * 2000-04-05 2002-12-10 Gregory B. Roberts System and method for bar code rendering and recognition
US6373587B1 (en) * 2000-05-19 2002-04-16 Pitney Bowes Inc. Method for printing electronic tickets
US20010047476A1 (en) * 2000-05-25 2001-11-29 Jonathan Yen Authenticatable graphical bar codes

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080300062A1 (en) * 2004-06-04 2008-12-04 Mattel, Inc. Electronic Device for Enhancing an Interactive Experience with a Tangible Medium of Expression
US8038538B2 (en) 2004-06-04 2011-10-18 Mattel, Inc. Electronic device for enhancing an interactive experience with a tangible medium of expression
US8622306B2 (en) 2004-06-14 2014-01-07 Fujifilm Corporation Barcode creation apparatus, barcode creation method and program
US7823784B2 (en) 2004-06-14 2010-11-02 Fujifilm Corporation Barcode creation apparatus, barcode creation method and program
US20050274804A1 (en) * 2004-06-14 2005-12-15 Fuji Photo Film Co., Ltd. Barcode creation apparatus, barcode creation method and program
WO2006009565A3 (en) * 2004-06-22 2006-08-31 Us Postal Service Method and system for providing a barcode image over a network
US20070106529A1 (en) * 2004-06-22 2007-05-10 United States Postal Service Method and system for providing a barcode image over a network
US20050283448A1 (en) * 2004-06-22 2005-12-22 Dixon Kyle M Method and system for providing a barcode image over a network
WO2006009565A2 (en) * 2004-06-22 2006-01-26 United States Postal Service Method and system for providing a barcode image over a network
US8401976B2 (en) 2004-06-22 2013-03-19 The United States Postal Service Method and system for providing a barcode image over a network
US20110140834A1 (en) * 2004-11-08 2011-06-16 Han Kiliccote Secure identification, verification and authorization using a secure portable device
US7578436B1 (en) 2004-11-08 2009-08-25 Pisafe, Inc. Method and apparatus for providing secure document distribution
US8342392B2 (en) * 2004-11-08 2013-01-01 Overtouch Remote L.L.C. Method and apparatus for providing secure document distribution
US20100191972A1 (en) * 2004-11-08 2010-07-29 Pisafe, Inc. Method and Apparatus for Providing Secure Document Distribution
US7543748B2 (en) * 2005-02-16 2009-06-09 Pisafe, Inc. Method and system for creating and using redundant and high capacity barcodes
US20060196950A1 (en) * 2005-02-16 2006-09-07 Han Kiliccote Method and system for creating and using redundant and high capacity barcodes
US20060210192A1 (en) * 2005-03-17 2006-09-21 Symagery Microsystems Inc. Automatic perspective distortion detection and correction for document imaging
US8376240B2 (en) 2005-12-16 2013-02-19 Overtouch Remote L.L.C. Method and system for creating and using barcodes
US20100044445A1 (en) * 2005-12-16 2010-02-25 Pisafe Method and System for Creating and Using Barcodes
US8215564B2 (en) 2005-12-16 2012-07-10 Overtouch Remote L.L.C. Method and system for creating and using barcodes
US8534567B2 (en) 2005-12-16 2013-09-17 Overtouch Remote L.L.C. Method and system for creating and using barcodes
US7966303B2 (en) * 2006-01-31 2011-06-21 Ricoh Company, Ltd. Data processing apparatus, data processing method, and computer-readable recording medium
US20070192335A1 (en) * 2006-01-31 2007-08-16 Yuuko Sugiura Data processing apparatus, data processing method, and computer-readable recording medium
US20080037899A1 (en) * 2006-08-14 2008-02-14 Xerox Corporation Image manipulation
US7627191B2 (en) * 2006-08-14 2009-12-01 Xerox Corporation Image manipulation
US20090028453A1 (en) * 2007-07-27 2009-01-29 Hewlett-Packard Development Company, L.P. Content Encoder and Decoder and Methods of Encoding and Decoding Content
US9270846B2 (en) * 2007-07-27 2016-02-23 Hewlett-Packard Development Company, L.P. Content encoded luminosity modulation
US8540141B2 (en) 2008-08-04 2013-09-24 Roche Diagnostics Operations, Inc. Encoding method for encoding medical items
US9581740B2 (en) 2008-12-15 2017-02-28 3M Innovative Properties Company Optically active materials and articles and systems in which they may be used
US9937879B2 (en) 2009-10-08 2018-04-10 3M Innovative Properties Company High contrast retroreflective sheeting and license plates
US20120200710A1 (en) * 2009-10-16 2012-08-09 Toshitaka Nakajima Prismatic retroreflective sheeting with reduced retroreflectivity of infra-red light
US9519087B2 (en) * 2009-10-16 2016-12-13 3M Innovative Properties Company Prismatic retroreflective sheeting with reduced retroreflectivity of infra-red light
US8353461B2 (en) * 2010-09-15 2013-01-15 Fuji Xerox Co., Ltd. Image processing apparatus, identification apparatus, electronic writing instrument, method for determining bit sequence and computer readable medium
US20120061469A1 (en) * 2010-09-15 2012-03-15 Fuji Xerox Co., Ltd. Image processing apparatus, identification apparatus, electronic writing instrument, method for determining bit sequence and computer readable medium
US20140231504A1 (en) * 2011-09-30 2014-08-21 Stephen M. DeRoos Decision device and method thereof
US9177032B2 (en) * 2011-09-30 2015-11-03 Hewlett-Packard Development Company, L.P. Decision device and method thereof
US9489465B2 (en) 2011-09-30 2016-11-08 Hewlett-Packard Development Company, L.P. Dynamically generating an information code
US10081314B2 (en) * 2012-03-30 2018-09-25 3M Innovative Properties Company Retroreflective articles having a machine-readable code
US9471863B2 (en) * 2012-03-30 2016-10-18 3M Innovative Properties Company Retroreflective articles having a machine-readable code
US20150060551A1 (en) * 2012-03-30 2015-03-05 3M Innovative Ropertiecompany Retroreflective articles having a machine-readable code
US20170028940A1 (en) * 2012-03-30 2017-02-02 3M Innovative Properties Company Retroreflective articles having a machine-readable code
US9170874B2 (en) 2012-07-17 2015-10-27 Hewlett-Packard Development Company, L.P. Providing a potential solution
US20140239072A1 (en) * 2013-02-28 2014-08-28 International Business Machines Corporation Automatically Converting a Sign and Method for Automatically Reading a Sign
US9092687B2 (en) * 2013-02-28 2015-07-28 International Business Machines Corporation Automatically converting a sign and method for automatically reading a sign
US20180268369A1 (en) * 2017-03-16 2018-09-20 Sarwar PEDAWI Global address system and method

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