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Intelligent Signature Capture - IMGBOX
Note: 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 imager to output only the area of the image
corresponding to the signature capture box. The imager also automatically
adjusts for aspect ratio and distortion, issues that arise due to imager skew with
respect to the bar code.
Align the aimers with the signature area (not with the bar code), then pull the
trigger. Send the IMGBOX command string after the trigger pull.
negative
positive
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 imager is held
from the bar code, assuming that the entire signature capture area is within the
imager's field of view.
The intelligent signature capture command string for this application is:
IMGBOX Modifiers
A - Output Image Width: This option is used to output an image of a
particular width. If using this option, set the resolution to zero.
B - Output Image Height This option is used to output an image of a
particular height. If using this option, set the resolution to zero.
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
2020/4820/4820i User's Guide
IMGBOX40S0X70Y190W100H1R0F
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