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VIVOTEK
User's Manual - 67
The methodology of using the Resize Buttons at the upper left corner of the streaming
window is the same as that on the home page.
5. Wait for the scan to complete. After a short while, the clearest image obtained should
be displayed and the optimal focus range achieved. Use the arrow marks on the sides
to ne-tune the focus if you are not satised with the results.
You may still need to use
the arrow marks to ne-tune the focus depending on the live image on your screen. “>”
means moving from wide to tele end; and “<” tele to wide.
Below is the procedure to perform the automated Focus function:
1. Select from the bottom of the screen whether you want to perform focus adjustment on
the Full view or within a Custom focus window. You can create a custom window and
click and drag the window to a desired position on screen.
2. It is recommended to Reset to the default back focus position of the sensor board.
3. You can use the Open iris checkbox (default) to increase the iris size for a better focus
adjustment result.
4. Click to select the Fine-tune focus or the Full-range scan buttons. When a full-range
scan is selected, a full-range scan through the camera's entire focal length can take
about 30 to 80 seconds. If not, the auto focus scan will only go through the length where
optimal focus may occur, and that takes about 15 to 20 seconds. In theory, best results
of the auto scan can be acquired when the camera's iris is fully open.
Keep focus position:
Use the Save day/night focus position to preserve your focus parameters. Trafc license
plate recognition requires more accurate focus. You can perform focusing at day time
once, and then perform focusing at the night time and save both the day and night
focusing positions. A blur issue due to the shifting focusing position can occur in daytime
(visible light) and nighttime (IR light) frequently. Saving the positions allows the camera
to switch to the correct setting when the IR cut lter turns into either the day or the night
mode.
Note that the Save day focus position button will not be available when in the night mode.
Nor will the Save night focus position button be available when in the day mode.
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