Ace Cad Acecat 302 Driver
It works for the Macally ICECAD Mini USB Graphic Tablet and the ACECAD Acecat Mini USB Graphic Tablet. They are Macally ICECAD Input Driver. Digitizer - x cm - electromagnetic - 3 buttons - wired - USB - retail. Official Ace Cad Acecat Free Driver Download for DOS - . World's most popular driver download site.
|File Size:||21.9 MB|
|Supported systems:||Windows 2K, Windows XP, Windows Vista, Windows Vista 64 bit, Windows 7, Windows 7 64 bit, Windows 8, Windows 8 64 bit, Windows 10|
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Ace Cad Acecat 302 Driver
The test features may be compared against features of a set of template signatures, and verified in response to the presence or absence of the test features in the template signatures.
The test signature may be preprocessed, so as to normalize it and remove artifacts which are irrelevant to verification. The features of the template signatures may be determined and stored in an associative memory or a data structure with associative memory capabilities, e. The method of verification may be adjusted to greater or lesser sensitivity in response to external conditions. Field of the Invention This Ace Cad Acecat 302 relates to signature verification.
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Description of Related Art In a variety of applications, methods for verifying that a person seeking access is in fact authorized are often required. For example, keys are commonly used to require some form of authentication before entry to a building or a vehicle is permitted. Where Ace Cad Acecat 302 is desired to software programs or to software-controlled devices such as an automated bank teller or credit card account access is often verified by requiring that the person seeking access enter a password or personal identifier number "PIN"or by requiring that such information be recorded on a magnetic strip or in the memory of a "smart" card.
While these methods of the prior art achieve the goal of limiting access, they are subject to several drawbacks. It would be Ace Cad Acecat 302 to have a method of authorization which allows verification in response to the signature of the person seeking access. However, known methods of signature matching generally require costly human review of the signature.
Accordingly, it is an object of the invention Ace Cad Acecat 302 provide a method of automated signature verification. In a preferred embodiment, the test signature may be preprocessed, so as to normalize it and remove artifacts which are Ace Cad Acecat 302 to verification. In a preferred embodiment, the features of the template signatures may be determined and stored in an associative memory or a data structure with associative memory capabilities, e. In a preferred embodiment, the method of verification may be adjusted to greater or lesser sensitivity in response to external conditions. An automated signature verification system may comprise an input device for receipt of an input signaturesuch as a writing implement and a pressure platecoupled to a processor for receiving data relating to the input signature In a preferred embodiment, the writing implement and pressure plate may comprise a stylus and graphics tablet for freehand computer input, in which the location of the stylus on the tablet and the pressure then exerted are periodically transmitted to the processoras are known in the art such as the "Acecat" graphics tablet made by ACECAD of Monterey, Calif.
However, it would be clear to those skilled in the art, after perusal of this application, that other types of input device would also be workable, and are within the scope and spirit of the invention.
The operation and software structures of Ace Cad Acecat 302 system are described herein in terms of their functions and at a level of detail which would be clear to those of ordinary skill in the art. It would also be clear to those skilled in the art, after perusal of this application, that processors of other types could be adapted to methods shown herein without undue experimentation, and that such other types of processor are within the scope and spirit of the invention.
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In response to the input signaturethe processor may generate a verification signalwhich may be used to verify the identity of the person writing the input signature This verification signal may be viewed by an operator, may be coupled directly to a locking deviceor may be coupled to software within the processor or within another processor. In a preferred embodiment, the verification signal may be combined with other methods for verifying the identity of the person, such as methods which Ace Cad Acecat 302 already known in the art.
A method of automated signature verification may comprise a template input stepa template normalization stepa template storage stepa test input stepa test normalization stepa comparison stepand an accept-reject decision step As shown herein, the method may use a system as described Ace Cad Acecat 302 reference to FIG. In a preferred embodiment, the set of template signatures may comprise at least five individual signatures. These template signatures are each input and normalized, and stored for later comparison.
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The method may then proceed, when verification of a person's identity is desired, to verify a test signature. The test signature is input and normalized, compared with the template signatures, and accepted or rejected in response to that comparison. In the template input stepthe person whose identity is to be verified later may write a set of template input signatures on the input devicee. The template input signatures are known to be valid signatures, and may be used later for comparison with the test input signature At Ace Cad Acecat 302 template input stepthe identity of the person may be explicitly identified to the system, e.
However, it is not required that the identity of the person be explicitly identified, e.
In a preferred embodiment, data transmitted by the input device to the processor may be periodically retrieved by the processoras is well known in the art, Ace Cad Acecat 302 stored in a data structure associated with the template input signature In a preferred embodiment, the data Ace Cad Acecat 302 comprise a set of pixels, each of which may comprise a set of pixel data, organized into a data structure as shown in the following table. However, those skilled in the art would recognize, after perusal of this application, that other sets of data elements would be workable, and are within the scope and spirit of the invention.
Use of a normalized form allows the processor to remove features of the template input signature which are deemed irrelevant to comparison with other signatures. Such irrelevant features may include noise introduced by the input deviceorientation, and Ace Cad Acecat 302. In the template storage stepthe template input signatures may be stored for later comparison with a test signature.
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In a preferred embodiment, features of the template input signatures may be determined in response to the Ace Cad Acecat 302 input signatures and stored in a manner which allows associative memory retrieval. In the test input stepthe person whose identity is to be verified may write a test input signature on the input devicein similar manner as the template input step At the test input stepthe identity of the person may Ace Cad Acecat 302 explicitly identified to the system in similar manner as in the template input step At the test input stepthe processor may capture similar data as in the template input step In the test normalization stepthe processor may normalize the test input signature in similar manner as the template normalization step is performed for the template input signature In the comparison stepthe processor may compare the test input signature with the stored template input signatures In a preferred embodiment, features of the test input signature may be determined with reference to the test input signature and compared with the stored template input signatures using associative memory retrieval.
It may occur that data captured by the graphics tablet has a higher Ace Cad Acecat 302 than data which is transmitted to the processore. This may result in two pixels being mapped to the same location on the graphics adapter, which in turn may cause the input signature to appear not to be smooth, and may even cause strokes of the input signature to appear to zigzag. Additionally, the manner in which the input signature was written may cause it not to be smooth.