GeoVision GV-LPR Manual de usuario

GV-LPR Camera

Installation Guide

2016/01

English

LPR-QG-E

All GeoVision Products are manufactured in Taiwan.

1. Important Notice

When installing the GV-LPR Camera, consider the guidelines in this document

to ensure the captured image is sound for further analysis.

The GV-LPR Camera comes with free GV-DVR LPR software. Since the free

GV-DVR LPR software is a trial edition, it can only capture the license plate

images and does not support plate recognition. When you use the access

control software GV-ASManager to see the captured plates, you will see “Plate

Not Recognized” message as illustrated below.

Continued on the reverse

● The view angle of the camera should be within 30 degrees to the

ground. Based on the view angle and the IR distance of your camera,

install the camera at a proper height and distance.

For example, if the IR distance of your camera is 20 meters, the camera

should be installed 12 meters at the maximum from the ground and 16

meters from the vehicle.

2. Installation Site

12M

16M

< 30°

20M

● Install the camera to the front of the vehicle (Recommended)

● Installing the camera on the side

< 15°

►

To avoid capturing unnecessary contents in the image, the camera should be

installed in a higher position to capture the front part of the vehicle only. When you

install the camera at angle to the side, the angle should not exceed 15 degrees.

● For VGA or D1 image resolution, the full width of the vehicle should fill the

image.

● For 1.3M image resolution, the captured vehicle should occupy

approximately half to two third of the image width.

3. Criteria for Qualified Car Plate Resolution

Note: The captured plate should be 30 to 35 pixels in height. To check

the height, copy and paste the characters into a Paint file and save it in

BMP format (e.g. ). Right-click the BMP file, select

Properties and click the Summary tab to find the Height information.

Note:

1. For GV-LPC 2210 / 2211 / 2011, only install your camera in such an

angle illustrated by figure1 and figure 3 to ensure image quality.

2. Try to avoid placing the camera where it can be subjected to direct LED

light. The LED lighting from vehicles, streetlights, etc. may cause flickering

images.

Figure 1

Figure 2

Figure 3

9F, No. 246, Sec. 1, Neihu Rd., Neihu District, Taipei, Taiwan

Tel: +886-2-8797-8376 Fax: +886-2-8797-8335

[email protected]

http://www.geovision.com.tw

4. Common Problems

● Large roll, yaw and pitch angles: adjust the angle and direction of the

camera.

● Low image contrast: adjust image contrast and/or improve lighting

conditions.

● Hollow characters: reduce the illumination.

● The plate is in shadow: avoid placing the camera where it is subjected to

direct sunlight, reflections or shadows. Recognition may be degraded.

● Overexposed images: reduce the illumination or adjust the angle/direction

of the camera.

● Blurry images: adjust the focus or the shutter speed of the camera.

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