ACECAD ACECAT 302 DRIVER DETAILS:
|File Size:||23.3 MB|
|Supported systems:||Windows 10, 8.1, 8, 7, 2008, Vista, 2003, XP, Other|
|Price:||Free* (*Free Registration Required)|
ACECAD ACECAT 302 DRIVER
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A method of Acecad Acecat 302 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 with reference to FIG. In a preferred embodiment, the set of template signatures may comprise at least five individual signatures. These template signatures Acecad Acecat 302 each input and normalized, and stored for later comparison. 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 Acecad Acecat 302 used later for comparison with the test input signature At the 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.
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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, and stored in a data structure associated with the template input signature In a preferred embodiment, the data may 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 Acecad Acecat 302 data elements would be workable, and are within the scope and spirit Acecad Acecat 302 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 size.
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In the template storage stepthe template input signatures may be stored for later comparison with a test signature. In a preferred embodiment, features of the template input signatures Acecad Acecat 302 be determined in response to the template 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 be explicitly identified Acecad Acecat 302 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 resolution 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 Acecad Acecat 302 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. At an initialization stepa set of weights w1, w2 and w3, and a threshold df, may be determined.
A preferred value for w1 may be 1, a preferred value for w2 may be 2, a preferred value for Acecad Acecat 302 may be 1, and a preferred value for df may be 4. At a smooth-once stepeach pixel value for Xi and Yi may be smoothed by computing a weighted average of that pixel, its predecessor pixel, and its successor pixel, as follows: EQU1 The smooth-once step may be performed for each pixel, except the first Acecad Acecat 302 last pixel.
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In a preferred embodiment, each pixel value for new Xi and new Yi may be computed using old values for that pixel, its predecessor pixel, and its successor pixel. At a compute-distance stepa distance di for Acecad Acecat 302 pixel between the pre-smoothed pixel values for Xi and Yi and the post-smoothed Acecad Acecat 302 values for Xi and Yi may be computed. In a preferred embodiment, this distance may be computed using a standard Euclidean distance metric.
The compute-distance step may be performed for each pixel. USB Tablet Driver for Acecat Flair USB, AcecatFlair II GT, Flair II GT Windows 98//XP. Language, Version, Update, Size, Driver. English, U3.
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