Novus 4000 series Merkblatt
Camera installation guidelines
for the proper operation of the Deep
Learning-based image analysis function
4000 series IP cameras
Installation guidelines IP 4000 series cameras version 1.0
All rights reserved © AAT SYSTEMY BEZPIECZEŃSTWA sp. z o.o.
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1. INTRODUCTION................................................................................................................. 3
2. INSTALLATION GUIDELINES - FACE RECOGNITION ......................................... 4
2.1. Choosing an installation location ................................................................................... 4
2.2. Camera positioning ......................................................................................................... 5
2.3. Camera options configuration......................................................................................... 7
3. INSTALLATION GUIDELINES - OTHER IMAGE ANALYSIS FUNCTIONS ....... 8
TABLE OF CONTENTS
Installation guidelines IP 4000 series cameras version 1.0
All rights reserved © AAT SYSTEMY BEZPIECZEŃSTWA sp. z o.o.
3
1. INTRODUCTION
Some models of the 4000 series IP cameras are equipped with advanced image analysis functions. To
ensure the proper and effective operation of the functions, it is necessary to meet certain requirements
regarding the place and method of installation of the camera.
Therefore, to ensure high efficiency of the image analysis (VCA) function, Novus recommends that
you follow the instructions in this manual when installing the camera.
INTRODUCTION
This manual is for reference only, and the drawings and diagrams contained therein are only
intended to illustrate the described options.
Due to the high requirements of the face recognition function regarding the scene selection and
camera installation location, it is impossible to give detailed directions. The best effect can be
obtained only by analyzing specific problems and user requirements, and placing the camera
adequately to the specific environment.
Installation guidelines IP 4000 series cameras version 1.0
All rights reserved © AAT SYSTEMY BEZPIECZEŃSTWA sp. z o.o.
4
2. INSTALLATION GUIDELINES - FACE RECOGNITION
2.1. Choosing an installation location
• Select an area where people move in an orderly manner towards the camera as the installation
site. The recognition site must not be obscured by anything. Make sure that the camera can
capture the direction of movement of all the people whose faces you want to recognize.
In the absence of space corresponding to the above conditions, it should be created by setting
walls, barriers, etc. so as to ensure orderly movement of people in front of the camera.
• Ensure stable and sufficiently intense lighting. In the event of insufficient light, or light falling
from behind on the recognized person, additional lighting should be provided so that facial
features are clearly visible.
INSTALLATION - FACE RECOGNITION
Place of installaon suitable: stable and suciently intense light, orderly movement of people
ensured.
Incorrect installaon place: insucient lighng, disordered movement of people, incorrect camera
observaon angle.
Installation guidelines IP 4000 series cameras version 1.0
All rights reserved © AAT SYSTEMY BEZPIECZEŃSTWA sp. z o.o.
5
INSTALLATION - FACE RECOGNITION
2.2. Camera positioning
• The camera should be positioned as directly in front of incoming people as possible. The
camera’s yaw angle should not exceed 30°.
• To minimize masking of the face when observing a group of people, the camera should be
positioned higher than the assumed average level for the faces of passersby. Depending on the
parameters of the camera and the dimensions of the observation site, the mounting height of the
camera should be between 2.5 - 3.5 m. For cameras with short focal length lenses (2.8mm,
3.6mm), the mounting height should not be higher than 3 m. The recommended camera tilt angle
is 15 °.
Installation guidelines IP 4000 series cameras version 1.0
All rights reserved © AAT SYSTEMY BEZPIECZEŃSTWA sp. z o.o.
6
INSTALLATION - FACE RECOGNITION
• The width of the recognition area (W) depends on the resolution of the camera sensor and optical
parameters. A recognition area that is too wide causes blurring and blur in captured face photos
and causes the face recognition to malfunction. Therefore, it is important to choose the
appropriate width of the recognition area, depending on the camera you have. The following table
may be helpful in estimating this parameter:
The distance (L) should be chosen so as to obtain the optimal width of the recognition area.
• The camera mounting height results from the assumptions given earlier and can be estimated
based on the following formula:
H = W + tanα * D
Where:
D - observation distance
W - average level on which faces of the observed people are located
α - camera tilt angle. For a recommended angle of 15 ° tanα = 0.27
Notes:
W is the height of the person's face. The assumed range is 1.3 m≤ W ≤1.7 m. The recommended
W value is 1.5 m. It is recommended that the camera tilt angle α be within the range of 5 ° ≤ α ≤
15 °.
Camera sensor resolution Optimum width of the recognition
area
2MPX 2.5m
4MPX 3.3m
6MPX 4.5m
8MPX 5.5m
Installation guidelines IP 4000 series cameras version 1.0
All rights reserved © AAT SYSTEMY BEZPIECZEŃSTWA sp. z o.o.
7
CONIGURATION - FACE RECOGNITION
2.3. Camera options configuration
• The primary parameter in face recognition is pupil distance. In order for the camera to be able to
correctly distinguish the details of a human face, it should fit in the field of 120x120 pixels. Then
the pupils are about 50 pixels apart, which is optimal for recognition.
For convenient definition of the face size in pixels, you can use the "Pixel counter" option
available as an icon under the live view window.
With the help of another person, place them at the assumed distance from the camera, and then
frame their face. The helper should then move towards and away from the camera until his face
fits within the desired size field. This will be the optimal place for facial recognition. If, for other
reasons, it is not possible to perform recognition in this place, adjust the focal length of the lens
or move the camera to obtain the desired effect.
• After you have positioned the camera, make the appropriate settings in the face recognition menu.
Among the configuration options, there are two ("Min Pixel" and "Max Pixel") related directly to
the face size in the recognition area.
The values of these options are selected such that the calculated or measured face size in the
recognition area is within the range.
Capturing the
scene for
analysis
Face
idencaon in
the eld of
120x120 pixels
Pupillary
posion
recognion
Face images larger and smaller than the set limits will be ignored and will not be analyzed.
Installation guidelines IP 4000 series cameras version 1.0
All rights reserved © AAT SYSTEMY BEZPIECZEŃSTWA sp. z o.o.
8
INSTALLATION - OTHER IMAGE ANALYSIS FUNCTIONS
3. INSTALLATION GUIDELINES - OTHER IMAGE ANALYSIS FUNCTIONS
Other image analysis functions such as "Human and Vehicle Detection", "Crowd Density Detection"
and "Queue Length Detection" also use the facial recognition engine to perform their functions. The
operation of the algorithm is slightly modified here and adapted to other tasks fulfilled by these
functions (especially this applies to the "Crowd Density Detection" and "Queue Length Detection"
functions, which can also recognize people from the back). However, despite these differences, also for
these functions, the principles of mounting and positioning the camera are the same as for the "Face
Recognition" function.
Installation guidelines IP 4000 series cameras version 1.0
All rights reserved © AAT SYSTEMY BEZPIECZEŃSTWA sp. z o.o.
9
NOTES
8.11.2022 TF, MK v.1.0
AAT SYSTEMY BEZPIECZEŃSTWA Sp. z o.o.
431 Pulawska St., 02-801 Warsaw, Poland
tel.: +4822 546 0 546, [email protected]
www.novuscctv.com
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Inhaltsverzeichnis
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