Signature capture technical

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Signature Capture Technical


<ul><li> 1. Signature Capture Technology Home About Us FAQ eSign Portal Tracking the Fast Changing eSignatures and Biometrics Industry Making Paperless Possible by Orion Systems, Inc. [ Register ][ Associations ] [ Technology ] [ Calendar ] [ Did You Know ] [Your Feedback ] [ Ask a Lawyer ] [ Orion Systems ] [ Legal ] eSign Portal Signature Capture Signature Capture Device A device that reads an individuals signature and converts it to a digital form. There are 2 basic types of signature capture technology: pressure sensitive (also known as touch screen) and electromagnetic. Pressure sensitive signature capture devices utilize technology that acts as an input device allowing one to sign their name just by touching the display screen. Signing is typically done using a plastic pen like device that contains no electrical or ink components or a true ink pen that writes ink over a paper that is placed over the signature capture display screen. One could use their finger or some other pointing device but the signature capture quality would suffer. The Technology There are a number of pressure sensitive technologies that are available on the market today. They range from electrically- sensitive (capacitive), acoustically-sensitive (SAW - surface acoustic wave) or photo-sensitive (infra-red). The most dominate signature capture pressure sensitive technology in use today is capacitive. For a good description of the different signature capture pressure sensitive technologies, refer to the Wikipedia descriptions on Touchscreen. Electromagnetic signature capture devices utilize technology comprised of a magnetic field and an electrical field. These types of device do not use pressure sensitive technology and thus require a special pen to transmit the signature capture data points. The signature capture pen is typically electrical while the signature capture pad is the magnetic field Some devices use a hybrid of both technologies. The advantage of pressure sensitive technology is that you do not need a special pen device to function, you merely need to apply pressure. A disadvantage to this technology is that, if more than one pressure point is applied at the same time, the device will sometimes spike and draw an incorrect straight line between the two points. The electromagnet devices do not Signature data formats have this spiking problem. Most signature capture devices convert the signature data points to vector (simply X and Y coordinates data) and transmit the data points to the host using varying formats and communications protocol. Some formats (as well as the device) are designed to be simple and supply a simple stream (similar to a mouse) of data points to an attached host system via the Serial port. The format typically contains the X and Y vector data along with a few control flags. The data is typically sent unencrypted. These types of devices do not typically contain a processor so the extent of what logic can be performed is extremely limited. In many respects these devices behave very similarly as mouse and can be priced somewhere1 de 2 17/01/2011 15:49 </li> <li> 2. Signature Capture Technology in the same range. Very often these signature capture devices Low End verification is the ability The more sophisticated Signature Class: Simple, low cost ($100 to $200) do not have LCD (screen displays). to reasonably verify whether a given signature is fraudulent. Signature verification signature capture devices include builtin processors, LCD There are a possibly a number cannot featuresin the device. providesand external system andof other be done cost signature screen, an number of vendors producing low such as Mag captureReader and Smart price Readers, will need to lookup The primary reason is that the system of which you will find Stripe devices with the Card range from $100 to $200 US dollars. This class of or of the individual fromBecause of the system stored the Retail device provides the basic signature most often in information Commerce industry. a database of captureprocessor,be connects approach more features such as which there may andmany. Theto a local PC serial an USB port. builtin function these devices perform requires or individual Since thesedata encryption, advanced enrollment) ahead of to sign their devicesseveral times builtin processors, they must signature name do not have (called compression (which communicate signature data cannot signature "looksthe host), time to informlocally (ie. theypoints transmission toover a LAN reduces the the system what their communicate like. The or WEB). They do not formats. (not necessary will capture the system stores characteristicsan Some screen, orthe signature and more complicated have LCD devices many of the more such as the features takes to complete points between itself) sophisticated(atime it found in the upper class signature, entire stylus data number of signature data the of device. The benefit of this signature, will format and can people a in dimensions of theand others etc. The ideathe that be found bit pen up events) class of device is cost is data into sign low-cost that are non-aligned fashion size time and (which their name in much the samewith the each of a byte thus it stream operations. would space and transmission time). to know or match these saves be difficult for someone else These signature capture Midrange Class: with At some later time when this individual salient characteristics. LCD screen, single feature ($200 to devices will, often, support multiple communications vehicles $400) USB and or activity, the system will compare the signs some form IP) beyond Serial communications. (notably characteristics with the saved enrolled ones and make a A midrange class of signature capture from the individual or determination whether the signature isdevices is priced in the $200 to $400 verification is used mainly in access similar not. Signature US dollar range and usually have a control design as the and is almost the added feature of an LCD environments low cost unit with never found in commerce, screen. The screen provide additional features as text and authorization, or other applications. In most non-access control graphic display output, signature display as an image or applications, the signature is captured while signing and touch screen input. Other than stored with the this class of imageable object, encrypted and the LCD screen, signed form. signature capture device verification is that it The drawback to signature s design and featuresisare the same an imperfect as the low cost units. science. The algorithms can fail an individual s signature. Individuals may sign slightly differently and cause the High End Class: with onboard processor, Multi Feature verification to fail. Terminals ($400-$600) The highest class of signature capture device is prices in the $400 to $600 or more US dollar range. This class of devices includes a builtin processor, LCD screen and other advance features such as Mag Stripe Reader and Smart Card Reader. Found mostly in the Retail or Commerce industry, these devices can also perform DEBIT or CREDIT card processing using the LCD touch screen pad. As such, they are multi purpose and combine many of the retail functions into one piece of hardware. They are commonly referred as Payment Terminals or Transaction Terminals.2 de 2 17/01/2011 15:49 </li> </ul>