Abstract: Read head array stitching techniques are described. A card reader includes an array of magnetic sensors (a read head array) for retrieving account information from a magnetic stripe of a financial transaction card. The magnetic sensors can be arranged in rows and columns. During a card swipe, each magnetic sensor receives a series of readings. A processor determines relative bit rates for each series of readings. The processor determines which sensor corresponds to which track of the magnetic stripe based on a comparison of the relative bit rates. The processor generates a data stream for at least one track based on portions of readings from each sensor during periods of time the sensor is determined to correspond to the track.

Abstract: A device is described for the hiding and subsequent recovery of visual information. The device comprises two or more tokens (1), each containing a mask (2,3) of coloured pixels (4), are overlaid (5), so that when the pixels are aligned, hidden information, invisible in the individual tokens. The hidden information consists of one or more recognisable alphabetic, numerical or pictorial characters (6). During token overlay and alignment, the information becomes recognisable because it is made up of pixels whose colour is differentiated from the other pixels in the overlay. The information is hidden by adding pixels of certain colours. When the tokens are overlaid and the pixels aligned, the added pixels are effectively subtracted, revealing the hidden information. The tokens may be printed on various media, or may be displayed on an electronic device.

Abstract: Methods and apparatus for issuing a payment device from a remote dispensing device are provided. In an embodiment, a dispensing device receives a purchase request including a load amount, to purchase a proximity payment device. The dispensing device reads proximity payment device information from a stored pre-personalized proximity payment device, establishes a secure communications channel with a security terminal, encrypts a personalization data request, transmits it to the proximity device issuer server, and receives an encrypted personalization message. The dispensing device then decrypts the encrypted personalization message to obtain personalization data, writes the personalization data and the load amount to the pre-personalized proximity payment device, and then dispenses the personalized proximity payment device.

Abstract: A method is disclosed for controlling operational parameters of a wireless reader device and/or one or more other devices based on proximity of the wireless reader device to a wireless electronic circuit. At a first location, the wireless reader device and/or the one or more other devices are controlled based on a first operational parameter. At a second location, interrogation signals are transmitted from the wireless reader device, and response signals are received at the wireless reader device. The response signals are transmitted from the wireless electronic circuit in response to receiving the interrogation signals from the wireless reader device. The response signals convey a control parameter to the wireless reader device that is associated with a second operational parameter. Thereafter, the wireless reader device and/or the one or more other devices are controlled based on the second operational parameter.

Abstract: A server apparatus having a one-time scan code issuing function, a user terminal having a one-time scan code recognizing function, and a method for processing a one-time scan code are provided so as to safely and conveniently transmit one-time information used for key-exchange-scheme-based encryption, using a scan code such as a bar code and a QR code.

Abstract: Methods and systems for generating and resolving multi-mode barcodes comprise: inputting graphical data representing a barcode pattern into memory; translating the graphical data into barcode information according to a standard for translating a particular type of barcode pattern into barcode information; detecting the presence of multiple, distinct data items of different types in the barcode information, wherein each data item specifies an action to be taken by the scanning device; identifying a data item in the barcode information for which the scanning device is capable of taking the action specified by the data item; and performing the action specified by the data item.

Abstract: A card reader device is provided with a housing having a slot for swiping a magnetic stripe of a card to complete a financial transaction between a buyer and seller. A read head is in the housing reads data stored on the magnetic stripe and produces a signal indicative of data stored on the magnetic stripe. An output jack is adapted to be inserted into a microphone input associated with a mobile device for provides the signal indicative of data stored on the magnetic stripe to the mobile device. A sourcing power device couples to an audio jack of the mobile device and sources power from the mobile device through the audio jack.

Abstract: A credit card reader shields a credit card, stores data from one or more credit cards simultaneously and then selectively broadcasts data associated with one of the cards. A slim, electromagnetically shielding housing has a cavity and a card reader for reading data from a credit card received in the cavity. A processor connects the card reader to a memory component, and connects both to an RFID device, where the credit card data can be broadcast to an RFID reader. A control interface allows a user to initiate reading credit card data, to select a card data set to store in memory, or to broadcast a dataset. A display shows transaction information and stored card data. A retractable input/output plug can engage a socket on another device to transmit and receive data. A memory card device can selectively store credit card data and transaction data.

Abstract: An electro-optical code reading terminal for dynamically switching mode of operation from a printed code reading mode to an electronically displayed code reading mode is provided. The electro-optical code reading terminal measures and monitors, using one or more magnetic sensors, a magnetic field experienced at the electro-optical code reading terminal. When the electro-optical code reading terminal device determines that a change in the measured magnetic field exceeds a predetermined threshold within a predetermined time period, the electro-optical code reading terminal device infers presence of an electronically displayed code. The electro-optical code reading terminal device then switches its mode of operation from the printed code reading mode of operation to the electronically displayed code reading mode of operation.

Abstract: Methods and systems read a machine identification code from a machine using a portable computerized device. Such methods and systems automatically sense current environmental conditions of the location and automatically calculate a current location-based environmental signature based on the current environmental conditions sensed by the sensors. Also, such methods and systems automatically compare the current location-based environmental signature with a previously stored location-based environmental signature to verify whether the machine identification code is in the correct location based on a similarity measure being above a predetermined threshold, using the processor. Such methods also display a machine identification validity message on a graphic user interface of the portable computerized device based on the process of verifying the machine identification code determining that the machine identification code is in the correct location.

Abstract: Provided is a device and methods for facilitating mobile device payments using a wearable personal digital device. The device may comprise a processor, a memory unit, a timepiece module, a communication circuit, a display, a camera, control elements, a connection port, and a band adapted to secure the device on a human body or clothes. The processor may be configured to retrieve information encoded in a barcode, generate barcodes, display retrieved information and barcodes on the display. Additionally, the device may comprise a swipe card reader to make payments using the wearable personal digital device by swiping a payment card through the device. In addition to that, the device may comprise one or more sensors and one or more accelerometers to measure biometric parameters of the user, display measured parameters on the display, and store the parameters to the memory of the device.

Abstract: A stream dot technique forming a dot pattern at an arbitrary position on a curved surface body or a medium surface by including the step of linearly and consecutively arranging a plurality of reference dots according to a predetermined rule, providing a first virtual reference line which connects the plurality of reference dots, providing a second virtual reference line which is defined at a predetermined position from the reference dot and/or the first virtual reference line, providing a plurality of virtual reference points at predetermined positions on the second virtual reference line, and placing an information dot whose information is defined by a distance and a direction from the virtual reference point at an end point expressed by a vector with the virtual reference point being a start point.

Abstract: An apparatus, a computer program product and a method is provided for data accessing during wireless communication. The example embodiment comprises receiving, through a transceiver at an apparatus, a first wireless signal comprising payload data and one or more indications instructing write operation for the payload data (520), and powering down the transceiver at least partly while storing the received payload data into an associated memory (530) within the apparatus according to the one or more indications.

Abstract: A read head system has a housing and a read positioned in the housing with a slot for swiping a magnetic stripe of a financial transaction card with the slot utilized to enable a financial transaction between a buyer and seller. The read head reads data on the magnetic stripe and produces a signal indicative of data stored on the magnetic stripe. The read head includes an output jack configured to be coupled to at least one of a audio jack or microphone port of a mobile device. The read head provides the signal to the mobile device.

Abstract: An apparatus includes a diffusive plate that is substantially perpendicular to the optical axis of an imaging lens arrangement and covers a side face of a solid rectangular defining a volume space within which parts of a scan engine are deposited. The parts of the scan engine including at least the illumination light source, the imaging lens arrangement, an imaging sensor, and a controller for controlling both the illumination light source and the imaging sensor. The diffusive plate includes a first opening to allow light enter the imaging lens arrangement through the first opening. The area enclosed by the boundary of the diffusive plate substantially equal to the area of the side face of the solid rectangular.

Abstract: The invention uses three-dimensional printing techniques to lay down a three-dimensional black and white grid (or “4-dimensional” grid, if color is used). To read and decode a three-dimensional bar-code, a light-field camera is used to capture the whole three-dimensional structure and the focus levels are then determined for a predetermined number of vertical levels. Adding color adds another degree of freedom (dimension) in the number and difficulty of encoding and decoding the three-dimensional bar-codes. These bar-codes cannot be simply made or copied, providing a level of security thereby.

Abstract: A data reading system including one or more imagers, the data reading system having a lower main housing structure with a horizontal surface, across which items to be read are passed, and an upper reader module, such as pole-mounted top down reader (TDR) including an imager configured to provide a top down viewing angle from above the horizontal surface of the item in a read region. In one configuration, the pole-mounted upper reader module includes a one-piece post housing section mounted to the main housing structure and extending therefrom and containing imaging electronics and optics of the upper reader.

Abstract: A product authorization service is described, including receiving, from a first source, an item serial number (ISN) of a product and an item-specific key (ISK) for the product; receiving, from a second source, a product-package serial number (PPSN) associated with the product and information about the second source; storing the received PSN with an authorized indication based on the information about the second source indicating an authorized source; receiving, from the product, the PSN and the ISN; determining whether the PSN is the same as the receive PSN with the authorized indication; and if the PSN is the same as the receive PSN, transmitting the ISK to the product, the ISK enables activation of one or more features of the product.

Abstract: A system and a method are configured to program, track and/or monitor infusion data (such as proper medication, dosage information, drug identification, patient identification, and/or other information believed to be relevant) for a drug infusion system. An electronic data tag, such as a radio frequency identification device (“RFID”) tag, may be coupled to one or more components of the infusion system, such as a medication container or infusion set.

Abstract: A checkout system includes a clerk-operated, bi-optical workstation through which products associated with targets having target data to be electro-optically captured are passed, and a customer-operated, accessory reader having an accessory window and a data capture assembly for capturing additional target data of additional targets associated with transaction-related items. The accessory reader is supported by the workstation for movement relative to the workstation to enable the customer to readily position and aim the accessory window at the additional targets.

Abstract: One embodiment is directed to a interconnection system comprising at least one port at which an interconnection between at least two cables can be made, an RFID reader configured to read an RFID tag attached to at least one of the cables interconnected at the port, and an interface to connect a removable module to the system. The removable module comprises a rechargeable battery to power the system. The removable module is configured to provide a communication link to communicate data read by the RFID reader to a device outside of the interconnection system. Other embodiments are disclosed.

Abstract: An apparatus and method for selectively attaching sensor(s) or antenna(s) to a mobile device at a convenient location are provided. The mobile device includes a body and a processing unit housed within the body for running an application, where the body includes a forward end and a rearward end that supports engagement with a charging dock. In addition, the rearward end accepts engagement of a snap-on module that physically assembles to and electronically interfaces with the mobile device. The antennas or sensors are externally mounted to the mobile device at a location proximate to the forward end of the body. Further, these antennas or sensors are interconnected to the snap-on module using media-routing conduit(s) that are configured to carry signals from the antennas or sensors to the snap-on module for distribution as an input to the application running on the processing unit.

Abstract: A security element is provided for a document of value. The security element includes an array of apertures through at least a portion of the document of value, the arrangement of apertures relative to one another forming an observable data item. The array of apertures includes apertures of at least two different shapes or orientations, the occurrence of the different shapes or orientations within the array representing an encoded data item. Also provided is a method of manufacturing a security element on a document of value, including: obtaining a first data item and generating an aperture array template; obtaining a second data item and encoding the second data item within the aperture array template; and perforating at least a portion of the security document according to the encoded aperture array template.

Abstract: A system verifying an item in a package comprises a package producer and a verifier. The package producer produces a package with a label, wherein the package includes an item each with one or more selected tag identifiers that are placed in a location on the item. The verifier verifies the item using 1) the one or more selected tag identifiers as detected using a spectral measurement or 2) a location or a shape of the one or more selected tag identifiers on the item, and 3) the label as read using a label reader.

Abstract: Embodiments are disclosed herein that relate to the use of active tag codes that change as a function of time to incorporate a greater amount of data into the tag code compared to a static tag code of similar configuration. For example, one disclosed embodiment provides a method of presenting an active tag code to a receiving device. The method includes presenting a first portion of the active tag code at a first time, the first portion of the active tag code encoding a first subset of information of a set of information encoded in the active tag code. The method further includes presenting a second portion of the active tag code at a second, later time, the second portion of the active tag code encoding a second subset of information of the set of information encoded in the active tag code.

Abstract: A method includes the following: (1) detecting light from a target object to capture multiple images of the target object while substantially maintaining the distance between the target object and the imaging lens arrangement that is configured to have a focus position thereof changed with a lens-driving-parameter; (2) processing the at least one of the multiple images to determine a feature-size in an aiming pattern; (3) processing at least two of the multiple images to find an optimal lens-driving-parameter that results in the maximum image sharpness; and (4) storing both the feature-size and the optimal lens-driving-parameter into a memory.

Abstract: Controlling rights associated with a product is described, including receiving, from a source, a first code of a media product, the first code is unique to the media product; authorizing the media product based on the first code and information about the source; receiving, from another source, the first code and a second code of media the product, the second code is unique to the media product; determining whether the first code is authorized; if the first code is authorized, identifying an encryption key for the media product based on the second code, and transmitting the encryption key to the second source, the encryption key enables access to content of the media product.

Abstract: A decodable indicia reading terminal can comprise a laser-based scanner, an imager-based scanner, a central processing unit (CPU), and an illumination assembly. The laser-based scanner can include a laser source, a photo-detector, and an analog-to-digital (A/D) converter. The laser source can be configured to emit a laser beam onto a substrate bearing decodable indicia. The photo-detector can be configured to receive a beam of a variable intensity reflected by the decodable indicia, and to output a first analog signal representative of the variable intensity. The A/D converter can be configured to convert the first analog signal into a first digital signal. The imager-based scanner can include a multiple pixel image sensor, an imaging lens, and an A/D converter. The imaging lens can be configured to focus an image of the decodable indicia on the image sensor.

Abstract: The invention relates to a magnetic stripe reader, and more particularly, to systems, devices and methods of directly extracting binary information embedded in a magnetic stripe using simple analog and digital signal processing techniques. Once information stored in the magnetic stripe is extracted as a F-2F waveform by the magnetic stripe reader, peaks, valleys and mid-level transition points between every consecutive peak and valley are detected. A peak-to-peak period and an average time are directly derived to determine whether the corresponding peak-to-peak transition is associated with a binary bit of “1” or “0”. This magnetic stripe reader spares a need for a multi-bit analog-to-digital converter (ADC) and a large memory, and thus, constitutes a simple and self-contained solution that may read out the binary information stored on the magnetic stripe with reduced power consumption and improved cost efficiency.

Abstract: A tire sorting apparatus for reliably reading information from a tire identifier, such as a barcode, formed on the surface of a tire without damaging the tire. Placed under a tire mounting table is a tire grip means which has three grip arms arranged circularly in a plane perpendicular to the tire center axis and link mechanisms for spreading the grip arms. Placed above the mounting table is a barcode reader rotating means for rotating a barcode reader held by a barcode reader holding means. The rotation axis of the barcode reader is aligned with the center of the circle formed by the grip arms of the tire grip means.

Abstract: A printed wiring board includes a circuit substrate on which sheets are laminated, a wireless IC element provided on the sheet, a radiator provided on the sheet, and a loop-shaped electrode defined by first planar conductors, via hole conductors, and one side of the radiator, coupled to the wireless IC element. The first planar conductors are coupled to the radiator and the second planar conductors by auxiliary electrodes.

Abstract: Systems and methods for managing access to electronic products are described. In an embodiment, a system implemented method includes receiving, from a source, a first code associated with an item; receiving, from another source, another first code and a second code associated with the item; evaluating the first code with the another first code; associating the second code with the first code based on a result from the evaluating; identifying an access key, and transmitting the access key to the second source, the access key is for accessing one or more rights associated with the item.

Abstract: A card reader (data read-out device) causes an image display section to display an image that indicates a predetermined portion on a display surface of a display panel, as a portion where a non-contact IC card (recording medium) is to be close. An antenna for making communications with a non-contact IC card is arranged at a portion located at the rear side of the predetermined portion on a rear surface of the display panel. In a case where a user brings a non-contact IC card close to the predetermined portion on the display surface presented as an image, the card reader reads out data from a non-contact IC card wirelessly by using an antenna. A user can identify a portion where a recording medium is to be brought close without turning his/her gaze away from the display surface of the card reader. Therefore, it is possible to bring a recording medium close to a proper position so as to enable reading out data.

Abstract: Aspects of the subject disclosure provide a card reader for receiving payment card information at a mobile point-of-sale terminal. In some implementations, a reader of the subject technology can include a memory, a conditioning module and a 3.5 mm audio plug including an audio bus that is configured for insertion into a headphone port of a host device, such as a smart phone or tablet computer. Implementations of the subject technology also include a microprocessor configured to perform operations for tuning communication parameters. That is, upon connection of the reader device to the host computing device, the devices can engage in an exchange of carrier waves which the devices exchange can used to not only determine and negotiate operational parameters for the devices that support a highest possible connection speed with acceptable connection quality.

Abstract: An antenna for use in an asset-identification system. The antenna includes a plurality of electrically conductive coils electrically connected in parallel. The coils are physically aligned along a common axis. The coils are offset along the common axis by a distance selected to reduce the mutual inductance between the electrically conductive coils, while allowing the signals from the electrically conductive coils to add together.

Abstract: A reading sensor adapted to read a security element having magnetic areas with different coercivity, comprising at least one first reading head and at least one second reading head, which are arranged parallel to each other and are capable of detecting two distinct signal sequences, and a permanent magnet which is arranged between the reading heads.

Abstract: A content authorization service is described, including receiving, from a first source, information comprises a key for accessing content recorded on a disc; storing the key, a pre-recorded media serial number (PMSN), and a product serial number (PSN); receiving, from a second source, another PSN, the another PSN; determining that the PSN and the another PSN is a same code; recording data that indicates the disc is authenticated if the PSN and the another PSN is the same code; receiving, from a third source, at least one of the PSN and the PMSN; determining that the at least one of the PSN and the PMSN identifies the disc; and if the at least one of the PSN and the PMSN identifies the disc, transmitting the key to the third source, the key enables access to the content recorded on the disc.

Abstract: A structure (10) for holding sample-containing receptacles includes a cover (40) with holes formed therein through which the receptacles can be accessed with a substance transfer mechanism, such as a robotic pipettor. When the transfer mechanism is inserted into and then withdrawn from a receptacle, a string of viscous material may be suspended from the mechanism. A viscous string removal element (44) adjacent each opening (42) engages the string of viscous material and dislodges the string from the mechanism when the mechanism moves in a prescribed path with respect to the removal element.

Abstract: A programmable camera includes a camera control device, an optical sensor, a volatile data memory, a flash memory, and an interface to a data bus, e.g., a CAN bus. The camera is configured to optically receive and read in program data in a programming mode with the aid of an optical code, e.g., a barcode, and to program the flash memory using the received program data.

Abstract: Systems and methods for creating and using 2-dimensional matrix code on tags or labels to identify panel components and associated information stored in and accessible from a data storage device or server or computer with a document management system (DMS). Related information can be encoded into an identifier using a URL with hyperlink onto a 2D matrix tag or label attached to specific panel component or wire. The information encoded in the 2D matrix code can be decoded using an interactive reader and data capture device such as a smart-phone or tablet computing device. Use the capture device's decoded information to provide interactive access and visual display to the interactive URL and hyperlink related information in the DMS. The capture device can be configured to provide immediate intelligence and functions with comparison and confirmation of quality, functionality, maintenance, status, and conformity with respect to panel components.

Abstract: A card reader that can prevent phishing and causes no damage on a card in the case where no phishing comes up. A card reader equipped with a card transfer mechanism for taking in and ejecting a card includes a gate mechanism, in which formed is an insertion & ejection slot for inserting and ejecting the card. A protrusion protruding toward an ejecting direction of the card is formed in the gate mechanism. Furthermore, the gate mechanism includes: a card detection mechanism for detecting the card having been ejected by the card transfer mechanism to a pullout-enabled position where a user of the card reader can pull out the card; and a card pullout prevention mechanism for protecting the card from being pulled out when the card is not ejected to the pullout-enabled position at the time of ejecting the card. The card detection mechanism is placed inside the protrusion.

Abstract: A portable health data tool permits a health care provider to assimilate and display a plurality of health care data from a patient and to associate the data with patient identifying information all stored in a memory contained in the tool. The tool includes a code reader for reading patient information into the tool from a bar code or other coded tag. The tool is associated with a plurality of different data assimilation devices stored with the tool's housing, including but not limited to, instruments for measuring, temperature, blood pressure, two-finger or lead wire ECG data, pulse oximetry data, sound data and picture data obtained from an optional digital camera integrated within the housing. The tool further includes data receiver and/or transmitter ports, which may be wireless or cable ports, for transferring data between the health data tool and a separate computer system that stores patient records.

Abstract: Aspects of the subject disclosure provide a card reader for receiving payment card information at a mobile point-of-sale terminal. In some implementations, a reader of the subject technology can include a memory, a conditioning module and a 3.5 mm audio plug including an audio bus that is configured for insertion into a headphone port of a host device, such as a smart phone or tablet computer. Implementations of the subject technology also include a microprocessor configured to perform operations for receiving a training sequence for use in determining communication parameters associated with a mobile device, and in response to the training sequence, transmitting an acknowledgement signal to the mobile device, via the audio bus, to indicate that a communicative coupling with the mobile device has been successfully established.

Abstract: An anti-counterfeit system comprises an item with at least one marker affixed thereto. The marker comprises a chemical signature having at least one chemical, and indicates the source of the item. The marker is detectable in the item to reveal whether the item is authentic or counterfeit. In at least one embodiment, the marker comprises a chemical signature that is unique to a particular entity and is affixed to items authentic to that entity. Further, a method of determining the authenticity of an item comprises isolating an item for testing, determining the presence of a marker, analyzing the marker for a chemical signature, comparing the results of the analysis to a chemical signature unique to a particular entity, and determining from the comparison whether the item is authentic or counterfeit. In some embodiments, the method further comprises quantifying the results of the analysis, such as the chemical(s) discovered therein.

Abstract: A method and program for encoding and decoding color barcodes to increase their data capacity. The encoding steps include determining a shape and a color for each data cell to encode digital data, wherein a combination of the shape and the color for the data cell is chosen from a plurality of combinations of shapes and colors in accordance with a value of the digital data to be encoded, and coloring a subset of the plurality of pixels in each data cell in accordance with the shape and the color for the data cell determined above. The decoding steps include segmenting the data cells in a color barcode, recognizing a shape formed by a subset of pixels in each data cell and the color of the shape, and obtaining digital data from a combination of the recognized shape and color in each data cell.

Abstract: A method for automatically sorting undeliverable as addressed (UAA) mail includes capturing an image of a first UAA mail piece with a camera connected to an automated mail sorter to create first image data, printing an id-tag on the mail piece, and classifying the first UAA mail piece as one of finalized or non-finalized. The method includes outputting a first label result to a label printer and printing a new label on the first UAA mail piece if the first UAA mail piece is classified as finalized.

Abstract: A stored-value container has a body and a stored-value chip mounted on the body. The stored-value chip stores payment information for transaction deduction after being read by an external device. When using the stored-value container to buy beverage, instead of paying with cash or a stored-value card, a consumer can hand the stored-value container to a store clerk to finish payment directly through the stored-value chip. Accordingly, with the stored-value container, consumers can finish the purchasing procedure quickly without carrying cash or a stored-value card and also take environmental protection into account.

Abstract: Cash drawers that are operated by wireless devices are disclosed. A cash drawer illustratively includes a communication interface that receives commands from a wireless device, and a controller that process the command received from the wireless device. The cash drawer may optionally include a reader that reads an identifier associated with the wireless device. The reader is illustratively an RFID reader and the identifier is an RFID tag associated with the wireless device. Alternatively, the reader is an NFC reader and the identifier is an NFC chip associated with the wireless device. In another embodiment, the cash drawer includes an identifier that is configured to be read by a wireless device. The identifier is illustratively either barcode, an RFID tag, or an NFC chip. The cash drawer may also include an indicator that identifies when the wireless device is authorized to operate the cash drawer.

Abstract: A barcode and RFID reading apparatus includes: a micro-controller; at least a RFID antenna configured to detect a RFID tag in a first area proximate to the reading apparatus; a RFID reader connected to the at least one antenna and controlled by the micro-controller, the RFID reader being configured to receive a RFID tag data from the at least one antenna and send the RFID tag data to the micro-controller; and a barcode reader controlled by the micro-controller, the barcode reader being configured to detect a barcode in a second area proximate to the reading apparatus and send a barcode data from the barcode to the micro-controller; the micro-controller is configured to check whether the barcode reader or the RFID reader ends a data-reading process; if one reader ends the data-reading process, the micro-controller switches off the one and switches on the other.

Abstract: A method for the detection of a marker affixed to the surface of an object, includes: acquiring a photographic image of a zone containing at least one marker; extracting contours from the photographic image; detecting a marker-positioning contour from among the aforementioned contours, which corresponds to a set of confocal conics having a predetermined form; modelling an image of the confocal conics in the form of a matrix having at least two symmetric matrices of order 3; analyzing the matrices in order to determine a perspective correction for the photographic image; detecting, in the perspective-corrected photographic image, an indexing element associated graphically with the positioning contour of the marker, and rotation-correcting the photographic image; detecting, in the perspective and rotation-corrected photographic image, encoded data graphically associated with the positioning contour of the marker, and decoding the encoded data. A marker-detection system using the method is also described.