SharpOS 14.2 Portal - Zoom and focus page - SharpV | SharpOS 14.2

AutoVu™ SharpV Deployment Guide 14.2

Product
SharpOS
SharpV
Content type
Guides > User guides
Version
14.2
Language
English
Last updated
2023-03-14

The Zoom and focus page is available from the Configuration > Cameras menu. Use the Zoom and focus page to adjust the images from the ALPR camera and context camera so that they are clear, and vehicles associated with plate reads can be easily identified.

Normally the zoom and focus is adjusted once, and only needs to be adjusted if the location of the SharpV changes.

To properly adjust the zoom and focus for the SharpV:
  • The camera must be pointed at a stationary license plate or target so that you can evaluate the appearance of the plate reads.
Cameras
Select which camera you want to adjust (ALPR or Context).
Temporarily adjust the exposure
Use the slider to adjust the exposure for the best plate image.
NOTE: This temporary setting is only used while adjusting the zoom and focus. Auto-exposure is temporarily suspended and the iris is fully open. After adjustment is complete, this setting is ignored and the camera uses the Exposure setting that is configured on the Configuration > Cameras page.
Enable Flash
(Context camera only) If you need to calibrate the zoom and focus of the context camera in low light conditions, select this option to enable the IR illuminator.
Set the zoom level
Use the slider to adjust the zoom level. Use the Show ruler option in the portal to help you adjust the zoom so that the plate characters are 25 - 60 pixels, where 30 pixels is ideal.
IMPORTANT: The zoom level impacts the focus. Always adjust the zoom level before setting the focus.
Set the focus
If you are not using the autofocus feature, you can use the slider to adjust the focus level.
Autofocus
The graph and the focus slider move as the autofocus calibration proceeds. After about 45 seconds, the Stop autofocus button changes back to Autofocus, signaling that the calibration is complete.
Best score
The Best score graph shows you when the optimal setting is reached for the focus. Two orange lines are displayed; the bright orange line indicates the current focus value, the dim orange line indicates the best focus that has been achieved since the Reset button was last pressed.
Reset
Click to reset the Best score graph.
Show ruler
Select this option to have the ruler display on the camera image. Drag the ruler next to the license plate and enter a pixel (px) value to change the size of the ruler on the screen. The height of the plate characters in the image should be between 25 - 60 pixels, where 30 pixels is ideal.
Tip: Click the license plate to use digital zoom to help you evaluate the best zoom level. There are three zoom levels: 1:1, 2:1, and 4:1. A preview of the zoomed area is displayed in the top right corner of the image.
Done
Click when you are finished calibrating the zoom and focus for your ALPR and Context cameras.