This function uses the dimensions of the bar code as its coordinate system. Thus, all parameters describing the image size and position are in units called Intelligent Bar Code Units. An Intelligent Bar Code Unit is equivalent to the narrow element width of the bar code.
Once the transfer has started, use oemGetImageData (page 12) to retrieve the image. The dimensions of the resulting image can be calculated using the following formula:
Resulting Width = Specified Width * Specified Resolution
Resulting Height = Specified Height * Specified Resolution
In the following figure, the center of the image of interest is at location (20, 18), its width is 28, and its height is 8. Again, all values are in Intelligent Bar Code Units. To convert measurements to Intelligent Bar Code Units, recall that each Intelligent Bar Code Unit is equal to the narrow element width. Thus, use the following formula:
Val in Intelligent Bar code Units = (Measurement in Inches) / ( Size of an Intelligent Bar code Unit)
or
Val in Intelligent Bar code Units = (Measurement in Inches) / (narrow element width)
| 22 |
| 18 |
Bar Code Height | 14 |
Narrow Element
Width (Intelligent
Bar Code Unit)
Image of Interest
+X axis
20 34
+Y
Result_t oemStartIntellImgXfer (
const IntellImgDesc_t *pImageDesc
)
Return Values
RESULT_SUCCESS RESULT_ERR_PARAMETER RESULT_ERR_BADREGION RESULT_ERR_BADSMARTIMAGE RESULT_ERR_SMARTIMAGETOOLARGE
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