86
2.3.5 Expanded Features
Decoder Customize function
This function adjusts the scanning speed to facilitate scanning of hard-to-read symbols.
• Decoder Deliberation Levels
The level of deliberation with which symbols are scanned can be set at five different levels.
Setting the level to Very Quick or Quick limits symbols which can be decoded but increases the
decoding speed. Alternatively, setting the level to Deliberate of Very Deliberate allows many
symbols to be read but slows down the decoding speed.
Table 2.56
Decoding
Deliberation
Levels
Target Speed
Very Quick 1D bar codes with good print quality Very fast
Quick 1D bar codes with poor print quality
PDF417 barcodes with 500 digits or less
Fast
Normal Package scanning
PDF417, DataMatrix, QR, Aztec, MicroPDF, Code49, Codablock
F, Maxicode, Composite bar codes with 1000 digits or less.
Normal (default)
Deliberate PDF417, DataMatrix, QR, Aztec bar codes with 1000 to 2000
digits.
TTLC39, RSS-14 Stacked, RSS Expanded Stacked bar codes with
80 digits or less.
Slow
Very Deliberate PDF417, QR, Aztec with 2000 digits or more TLC39 with 80
digits or more
Very slow
The functions of the Imager Library relevant to the “Decoder Deliberation Levels” are as follows.
IMGSetDeliberation
: Sets up deliberation level for decoding symbol.
IMGGetDeliberation
: Retrieves the deliberation level for decoding symbol.
• Print Weight Adjust function
This function improves scanning of bar codes with thick or thin bars. Seven scales of the setting
are available. In ordinary condition, the setting does not required to adjust. However, it is useful to
improve scanning performance on bar code in a difficult condition.
Figure 2-11
The functions of the Imager Library relevant to the Print Weight are as follows.
IMGSetPrintWeight
: Sets up print weight of bar thickness used for decoding symbol.
IMGGetPrintWeight
: Retrieves print weight of bar thickness used for decoding symbol.
1 2 3 4 5 6 7
Thin Default Thick
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