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Intelligent Signature Capture - IMGBOX
IMGBOX commands can only be used with PDF417, Code 39, Code 128, Aztec,
Codabar, and Interleaved 2 of 5 symbologies.
Intelligent signature capture ships only part of an image to the host application.
This method reduces transfer time and file size, while simplifying signature
capture.
Below is an example of an intelligent signature capture application. In this
example, the operator reads the bar code, which is then transmitted to the host
application. Upon the receipt of the bar code data, the host application sends
the IMGBOX command, which tells the scanner to output only the area of the
image corresponding to the signature capture box. The scanner also
automatically adjusts for aspect ratio and distortion, issues that arise due to
scanner skew with respect to the bar code.
Align the aimers with the signature area (not with the bar code), then activate the
trigger. Send the IMGBOX command string after the trigger command.
An important aspect of intelligent signature capture is that all dimensions used in
the application are measured as multiples of the minimum element size of the
bar code. Using this method, intelligent signature capture always outputs the
correct image size and resolution, no matter the distance at which the scanner
is held from the bar code, assuming that the entire signature capture area is
within the scanner’s field of view.
The intelligent signature capture command string for this application is:
IMGBOX40S0X70Y190W100H1R0F
IMGBOX Modifiers
D - Pixel Depth: Indicates the number of bits per pixel in the transmitted
image.
8D 8 bits per pixel, grayscale image
1D 1 bit per pixel, black and white image
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