GeoVision GV-LPR2811-DL User manual

GV-LPR2811-DL Camera
Installation Guide
Thank you for purchasing GV-LPR2811-DL Camera. This guide is designed to inform users
of certain installation guidelines and tips before installing the camera. For advanced
information on how to use GV-LPR2811-DL, please refer to GV-LPR2811-DL Camera User’s
Manual.
LPR2811-DL-IG-A

© 2020 GeoVision, Inc. All rights reserved.
Under the copyright laws, thismanual may not be copied, inwhole or inpart,
without the written consent of GeoVision.
Every effort has been made to ensure that the information in this manual is
accurate. GeoVision, Inc. makes no expressed or implied warranty of any kind
and assumes no responsibility for errors or omissions. No liability is assumed
for incidental or consequential damages arising from the use of the information
or products contained herein. Features and specifications are subject to
change without notice.
Note: No memory card slot or local storage function for Argentina.
GeoVision, Inc.
9F, No. 246, Sec. 1, Neihu Rd.,
Neihu District, Taipei, Taiwan
Tel: [phone]
Fax: [phone]
http://www.geovision.com.tw
Trademarks used in this manual: GeoVision, the GeoVision logo and GV
series products are trademarks of GeoVision, Inc. Windows and Windows XP
are registered trademarks of Microsoft Corporation.
November 2020

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Contents
1. Installation and Recognition Parameters ...................................................................2
2. Wire Definition..............................................................................................................5
3. Common Problems ......................................................................................................6

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Before installing GV-LPR Cameras, please read through this document carefully to ensure
the captured images are suitable for license plate recognition.
1. Installation and Recognition Parameters
View Angle
⚫Vertical View Angle ≦30°: The vertical view angle of the camera shall be within 30
degrees to the ground.
⚫Horizontal View Angle ≦30°: The horizontal view angle of the camera shall be within
30 degrees relative to the recognition target.
Camera Position
Installation Scenario
Recommended
Height in m (ft)
Recognition
Distance in m (ft)
Maximum Speed
in km/h (mi/h)
Parking Entrance/Exit
1 ~ 3 (3.3 ~ 9.8)
4.5 ~ 22
(14.8 ~ 72.2)
30 (18)
Roadside
1-Laned
2 ~ 6 (6.6 ~ 19.7)
100 (62)
2-Laned
8 ~ 22
(26.2 ~ 72.2)
60 (37)
Centered-
Top
1-Laned
5 ~ 6 (16.4 ~ 19.7)
100 (62)
2-Laned
60 (37)

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⚫Parking Entrance/Exit: For installing at a parking entrance/exit, the camera shall be
mounted at a recommended height of 1 ~ 3 meters (3.3 ~ 9.8 ft) with an optimal
recognition distance of 4.5 ~ 22 meters (14.8 ~ 72.2 ft) while the speed of the target
vehicle cannot be more than 30 km/h (18 mi/h).
4.5 ~ 22 m (14.8 ~ 72.2 ft)
1 ~ 3 m
(3.3 ~ 9.8 ft)
⚫Roadside: For installing at the side of a road, the camera shall be mounted at a
recommended height of 2 ~ 6 meters (6.6 ~ 19.7 ft), with an optimal recognition distance
of 4.5 ~ 22 or 8 ~ 22 meters (14.8 ~ 72.2 or 26.2 ~ 72.2 ft), respectively for single-laned
and dual-laned roads, while the speed of the target vehicle cannot exceed 100 or 60 km/h
(62 or 37 mi/h).
2 ~ 6 m
(6.6 ~ 19.7 ft)
4.5 or 8 ~ 22 m (14.8 or 26.2 ~ 72.2 ft)

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⚫Centered-Top: For installing at the top of the center of a road, the camera shall be
mounted at a recommended height of 5 ~ 6 meters (16.4 ~ 19.7 ft), with an optional
recognition distance of 8 ~ 22 meters (26.2 ~ 72.2 ft), while the speed of the target vehicle
cannot exceed 100 or 60 km/h (62 or 37 mi/h), respectively for single-laned and
dual-laned roads.
5 ~ 6 m
(16.4 ~ 19.7 ft)
8 ~ 22 m (26.2 ~ 72.2 ft)
Note: The captured plate should be no less than 50 pixels in height. To check the height,
copy the license plate image, open and paste into Paint, and save it in BMP format.
Right-click the BMP file, select Properties and click the Summary tab to find the height
information.

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2. Wire Definition
The data cable provides connection for power, ground and network access. The wires are
defined as below:
2
1
3
4
5
No.
Wire
Definition
1.
RJ-45
Ethernet / PoE (IEEE 802.3af)
2.
2-pin terminal block
DC 12V
3.
Pink RCA
Audio Input
4.
Green RCA
Audio Output
5.
Digital I/O
Blue
DI 1
Green
DI 2
Yellow
DO 1
Orange
DO 2
Brown
GND
Gray
RS-485 1+
Purple
RS-485 1-
Bright Green
RS-485 2+
White
RS-485 2-

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3. Common Problems
⚫Low Image Contrast: Adjust the image contrast and/or improve lighting conditions of the
recognition site.
⚫Large Roll, Yaw and Pitch Angles: Adjust the angle and direction of the camera.

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⚫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.
⚫Hollow Characters: Reduce the illumination.
⚫Plate Covered in Shadow: Avoid placing the camera where it is subjected to direct
sunlight, reflections or shadows, which may limit recognition performance.