CipherLab 9400 Series User Manual page 50

9400 .NET Programming
imageIllumination
[in][out] A value that defines whether to flash illumination on every image
capture to aid decoding.
gain
[in][out] A value that defines gain when Decoding Autoexposure or Image
Autoexposure is disabled.
exposureTime
[in][out] A value that defines exposure time when Decoding Autoexposure or
Image Autoexposure is disabled.
snapshotModeTimeout
[in][out] A value that defines the amount of time it remains in Snapshot Mode.
It exits Snapshot Mode upon a trigger event, or when the Snapshot Mode
Timeout elapses.
snapshotAimingPattern
[in][out] A value that defines whether to project the aiming pattern on every
image capture.
imageResolution
[in][out] A value that defines how to alter image resolution before
compression. Multiple pixels are combined to one pixel, resulting in a smaller
image containing the original content with reduced resolution.
42
Guide
0 Disable Image Capture Illumination
1* Enable Image Capture Illumination
79~127
Gain is a means of amplifying the raw image data before it is converted
into 256 grayscale values. Increasing the gain increases brightness and
contrast, but also increases noise (undesired electrical fluctuations in the
image) which makes the image less attractive and/or harder to decode.
5, 10, 15, 20, 25 or 30
Exposure Time controls the amount of time the CCD is allowed to collect
light, mush like the shutter speed for a camera, Generally, the brighter the
environment, the lower the exposure time. Increasing the exposure time
past 20 ms in a handheld application increases the risk of blurring the
image due to hand jitter.
0~9 0* (= 30 seconds)
Values increment by 30. For example, 1 = 60 seconds, 2 = 90
seconds, etc.
0 Disable Snapshot Aiming Pattern
1* Enable Snapshot Aiming Pattern
0* 640×480 (= Full resolution)
1 320×240 (= Half resolution)
2 212×160 (= 1/3 resolution)
3 160×120 (= 1/4 resolution)
100*
10* (millisecond)