7 - 4 DS457 Fixed Mount Imager Integration Guide
Imager Preferences
The parameters in this chapter control image capture characteristics. Image capture occurs in all modes of
operation, including decode, video, and snapshot.
Operational Modes
The imager has three modes of operation:
•
Decode Mode
•
Snapshot Mode
• Snapshot with Viewfinder Mode
•
Video Mode.
Decode Mode
By default, upon a trigger event, the imager attempts to locate and decode bar codes within its field of view.
The imager remains in this mode as long as the trigger is active, until it decodes a bar code, or it reaches the
Decode Session Timeout on page 6-19.
Snapshot Mode
Use Snapshot Mode to capture a high-quality image and transmit it to the host. To temporarily enter this mode
scan the Snapshot Mode bar code. While in this mode the imager blinks the green LED at 1-second intervals
to indicate it is not in standard operating (decode) mode.
In Snapshot Mode, the DS457 laser aiming pattern highlights the area to capture in the image. The next trigger
event instructs the imager to capture a high quality image and transmit it to the host. A short time may pass
(less than 2 seconds) between trigger activation and image capture as the imager adjusts to the lighting
conditions. Hold the imager steady until image capture, denoted by a single beep.
If a trigger event does not occur within the Snapshot Mode Timeout period, the imager returns to Decode
Mode. Use Snapshot Mode Timeout on page 7-14 to adjust this timeout period. The default timeout period is
30 seconds.
To disable the laser aiming pattern during Snapshot Mode, see Snapshot Aiming Pattern on page 7-14.
Use Video View Finder on page 7-32 to enable Snapshot with Viewfinder Mode. In this mode the imager
behaves as a video camera until the trigger activates, at which time a Snapshot occurs as described above.
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