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Ganz PixelPro Series Interface Manual

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H.264 NETWORK CAMERA
VCA Interface Manual

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Summary of Contents for Ganz PixelPro Series

  • Page 1 H.264 NETWORK CAMERA VCA Interface Manual...

  • Page 3: Table Of Contents

    Table of Contents Introduction ..........................1 Getting Started .......................... 3 VCA Feature Packages ....................... 5 Accessing VCA Configuration ..................... 7 Activation........................... 9 Activation..........................9 Obtaining an Activation Code ....................9 Applying an Activation Code to a Unit ................10 Enabling VCA ........................... 13 Switching VCA On and Off ....................
  • Page 4 Printed Documentation Non Detection Zones ......................24 Detection Rules ........................24 Detection Rules ....................... 25 Object Presence ....................... 25 Object Direction ......................26 Object Enter and Exit ....................... 26 Object Appear and Disappear ..................27 Object Dwell ........................28 Object Stopped ........................ 29 Object Class ........................
  • Page 5 Table of Contents Predefined Requests ....................... 53 Command Request ......................54 Importing Data into Microsoft Excel ................... 55 Camera Calibration ........................59 Camera Calibration ......................59 Camera Calibration Topics ....................59 Calibration Page Elements ....................59 3D Graphics Overlay ......................59 Mouse controls ........................
  • Page 6 Printed Documentation Maximum Hold-on Time ....................79 Allow Manual Override (User Control) ................79 Auto-tracking Initiation ....................79 PTZ Profile Configuration ....................80 PTZ Profile Configuration....................80 Creating a New PTZ Profile ....................80 Editing an Existing PTZ Profile ..................81 Removing a PTZ Profile ....................
  • Page 7 Table of Contents Minimum Alarm Object Display Time ................102 Minium Object Display Time ..................102 Detection Point of Tracked objects ................... 102 Restore All Default Settings ....................103...

  • Page 9: Introduction

    Introduction VCAsys is a real-time video analytics engine that utilizes advanced image processing algorithms to turn video into actionable intelligence. At the core of the product is an advanced object tracking engine that continually tracks moving and stationary targets. The tracking engine features built-in robustness to environmental nuisance conditions such as changing illumination, moving foliage, rippling water, etc.

  • Page 11: Getting Started

    Getting Started In order to get up and running as fast as possible, the following steps should be executed:  Locate a unit that supports VCAsys and ensure it is upgraded to a firmware version that contains the VCAsys engine. ...

  • Page 13: Vca Feature Packages

    VCA Feature Packages VCA functionality is available in a range of different packages and on different platforms. The license types available for IP and PC platforms are listed in the following table.

  • Page 15: Accessing Vca Configuration

    Accessing VCA Configuration All configuration of the VCAsys engine is performed by accessing the VCA section of the unit setup page:...

  • Page 17: Activation

    Activation Activation Some features of VCAsys must be activated before they can be used. Activating VCAsys consists of the following two steps:  Obtaining an activation code from your hardware supplier.  Applying an Activation code to the unit. Obtaining an Activation Code Before VCAsys can be enabled, it must be activated.

  • Page 18: Applying An Activation Code To A Unit

    Printed Documentation Applying an Activation Code to a Unit Once an activation code has been received from your hardware supplier, it's simply a case of entering the code on the appropriate web page. Select the the Activation menu:...
  • Page 19 Activation Enter the activation code and click "Apply". If the activation code is valid, the activated features will be displayed in the "Installed Licenses" box.

  • Page 21: Enabling Vca

    Enabling VCA Switching VCA On and Off By default, VCA is disabled. In order to enable VCA it must be activated. Select the VCA menu and then the Enable/Disable sub menu. Tick the Enable check box under Analytics and select the required mode.
  • Page 22 Printed Documentation Optimized for tracking people in indoor cluttered scenes. Exhibits higher performance when people are in close proximity to each other - people are tracked even when one person is obscured by the other. NOTE:  The People Tracking engine consumes more system resources than the Surveillance Tracking engine.

  • Page 23: Abandoned/Removed Object Detection

    Enabling VCA Abandoned/Removed Object Detection Check/Uncheck to enable/disable abandoned/removed object detection. When checked, a background process to detect abandoned and removed objects is enabled.

  • Page 24: Counting Line

    Printed Documentation NOTE: The use of abandoned object detection may degrade the ability of the tracking engine to track moving targets through occlusions. Therefore, this feature should only be enabled if the detection of abandoned or removed objects is necessary. Counting Line Check/Uncheck to enable/disable the counting line functionality.
  • Page 25 Enabling VCA...

  • Page 27: Configuration Of Zones And Rules

    Configuration of Zones and Rules Configuration of Zones and Rules In order to create some useful output, it is necessary to configure detection zones and detection rules. The detection zones and rules are configured by selecting VCA and then the Zones and Rules sub menu: Tracking Display tracking display...

  • Page 28: Event History

    Printed Documentation  Object stopped  Object dwell  Object direction  Object speed  Object tailgating  Counting line  Abandoned/removed object  Smoke detection  Fire detection  Object colour filer Event History The event history control shows the history of objects that have triggered rules and generated alarms.

  • Page 29: Display Non-Alarmed Objects

    Configuration of Zones and Rules Select this option to toggle between 2-color display mode (alarmed objects in red, non- alarmed objects in yellow), or multi-color displayed mode. In multi-color display mode, objects are displayed in a color selected by the system. Display Non-Alarmed Objects By default, all objects are displayed: alarmed objects in red;...

  • Page 30: Creating Detection Zones And Lines

    Printed Documentation Creating Detection Zones and Lines In order to detect events of interest, detection zones and lines must be defined. Detection zones define an area of interest. Detection lines are similar to detection zones but they define a perimeter instead of a region. Creating a Zone or Line To create a zone, either double click the left mouse button or right click and select Zone/Line...

  • Page 31: Editing Zones And Lines

    Configuration of Zones and Rules Editing Zones and Lines Zones and lines can be edited to be any shape or size. Zones and lines are controlled by manipulating "nodes" that represent the zone/line vertices. To change the shape of a zone or line, simply grab a node with the left mouse button and drag it to the desired location: Adding and Removing Nodes Zones and lines can be tailored to any scenario by simply adding more nodes to define the...

  • Page 32: Non Detection Zones

    Printed Documentation Non Detection Zones In some situations, especially where the scene is busy, objects tracked in some areas can interfere with detection zones in other areas. For example, on a windy day, moving foliage can generate false alarms that in some situations could be tracked through a detection zone. In order to minimize such issues, it is possible to configure "non-detection"...

  • Page 33: Detection Rules

    Configuration of Zones and Rules Detection Rules Once some detection zones and/or lines have been configured, it's possible to define some detection rules that apply to the zones/lines. By default, zones and lines are automatically configured to detect object presence. The rules are defined in the Properties Inspector: The properties inspector is context-sensitive to the zone selected.

  • Page 34: Object Direction

    Printed Documentation Objects that are present inside a zone or pass through a line will trigger the rule and raise an alarm. Object Direction Enable the object direction rule on the selected zone by checking the Direction Filter box in the properties inspector.

  • Page 35: Object Appear And Disappear

    Configuration of Zones and Rules Object Appear and Disappear Enable the object appear and disappear detection by checking the corresponding check boxes in the properties inspector and click apply. An object appear alarm is raised when an object appears inside a detection zone. Note that this is different from object entered detection since the object must be initially detected inside the zone without entering, e.g.

  • Page 36: Object Dwell

    Printed Documentation Object Dwell Enable the object dwell rule on the selected zone by checking the Dwell box in the properties inspector and click apply. Objects that dwell inside a zone for longer than the defined amount of time will trigger the rule and raise an alarm.

  • Page 37: Object Stopped

    Configuration of Zones and Rules Object Stopped Enable the object stopped rule on the selected zone by checking the Stopped box in the properties inspector and click apply. Objects that are stopped inside a zone for longer than the defined amount of time will trigger the rule and raise an alarm.

  • Page 38: Object Tailgating

    Printed Documentation In this example, the rule has been configured to include detection of people only. As illustrated, the person generates an alarm, but the vehicle is filtered out and does not trigger the alarm. Object Tailgating Enable the object tailgating rule on the selected zone by checking the Object Tailgating box in the properties inspector.
  • Page 39 Configuration of Zones and Rules Object Tailgating Trigger The tailgating filter can use either the tracking engine or the counting line as trigger sources for tailgating detection. Since the counting line exhibits higher performance when detecting multiple objects crossing a line, best performance will be obtained when the trigger is set to "Counting Line".

  • Page 40: Abandoned And Removed Object

    Printed Documentation Abandoned and Removed Object VCAsys can be configured to generate an alert highlighting an abandoned or removed object. Suspicious objects can be detected when carried into the scene and planted by a person as well as when dropped or thrown into the scene. Ensure that abandoned/removed object detection is enabled by checking the "Abandoned/removed object detection"...
  • Page 41 Configuration of Zones and Rules NOTE: The algorithm used for abandoned and removed object detection is the same in each case: it cannot differentiate between abandoned or removed objects. This is a fundamental limitation of the algorithm and arises because it just analyses how blocks of pixels change with respect to a background model that is constructed over time.
  • Page 42 Printed Documentation Stationary Object Hold-on Time The stationary object hold-on time is the time which the tracker will keep tracking an object once it has been detected as stationary or abandoned/removed. After an abandoned/removed object has been detected, the object will continue to be tracked for the time configured determined by the stationary object hold-on time.

  • Page 43: Object Speed

    Configuration of Zones and Rules Object Speed Enable the object speed rule on the selected zone by checking the Speed Filter box in the properties inspector. Adjust the lower and upper speed limits to suit the detection scenario. Objects that travel within the bounds of the configured speeds, through a zone or over a line trigger the rule and raise an alarm.
  • Page 44 Printed Documentation  People counting with overhead cameras in a retail environment.  Vehicle counting with overhead cameras on public highways. The counting line filter can be enabled when the unit has been configured with VCAcount/VCAaccess/VCAadvanced/VCApro license. In some scenes such as entrance with camera over-head installed, the counting line typically will generate a higher accuracy count than using the counters provided as part of VCAsurveillance.
  • Page 45 Configuration of Zones and Rules Calibrating the Counting Line In order to generate accurate counts, the counting line requires calibration. Unlike VCAsurveillance, this cannot be performed at a general level for the whole scene using the 3D calibration tool. This is because the counting line is not always placed on the ground plane: it may be placed at any orientation at any location in the scene.
  • Page 46 Printed Documentation Shadow Filter The counting line features a shadow filter which is designed to remove the effects of object shadows affecting the counting algorithm. Shadows can cause inaccurate counting results by making an object appear larger than its true size or by joining two or more objects together. If shadows are causing inaccurate counting, the shadow filter should be enabled by selecting the "Shadow Filter"...
  • Page 47 Configuration of Zones and Rules When the diagnostics metadata is enabled, the diagnostics will appear as black and white lines on either side of the counting line on the Zones and Rules page. Each line represents an object which was detected by the counting algorithm. The width of the line shows the width of the object detected by the line.

  • Page 48: Smoke Detection

    Printed Documentation Smoke Detection Enable the smoke detection filter by checking the Smoke Detection box in the properties inspector. If smoke is detected inside the corresponding detection zone alerts are raised in the alarm log window. The Time setting specifies how long smoke should be detected for, before the smoke detected event is raised.

  • Page 49: Fire Detection

    Configuration of Zones and Rules Fire Detection Enable the fire detection filter by checking the Fire Detection box in the properties inspector. If fire is detected inside the corresponding detection zone alerts are raised in the alarm log window. The Time setting specifies how long fire must be detected for, before the fire event is raised.
  • Page 50 Printed Documentation Diagnostic Data In order to evaluate the performance of the fire detection and troubleshoot issues in challenging circumstances, it's possible to enable the display of fire blobs. The blobs show the underlying pixels detected as potentially being fire by the algorithm. Note that the blobs must be enabled to be transmitted in the metadata on the advanced settings page for them...

  • Page 51: Object Colour Filter

    Configuration of Zones and Rules Object Colour Filter NOTE: The object colour filter requires a VCApro license, and the Tracking mode must be set to People Tracking on the VCA Enable/Disable page. Enable the object colour filter by checking the corresponding box in the properties inspector and click apply.
  • Page 52 Printed Documentation Object Colour Signature For every object that's tracked, a colour signature is calculated and transmitted in the metadata stream. The colour signature can be displayed as an overlay on the screen to help the selection of the parameters for the colour filter. In order for the colour signature to be displayed, the colour signature must be enabled in the metadata settings on the advanced page...

  • Page 53: Counters

    Counters Counters VCAsys also supports object counting. Any combination of detection zones or lines can be assigned to a counter. Counters can be configured to perform any combination of incremental, decremental or occupancy counting. Counter configuration is managed through the properties inspector in a similar way to the zone configuration. Topics in this section: ...

  • Page 54: Incremental Counters

    Printed Documentation In this example the red zone is configured to trigger when object travelling in the north direction are detected. The counter has been configured to increment the count whenever the zone (Zone 0) is triggered. Currently two objects have been counted. Incremental Counters When a zone is assigned to an incremental counter, the count will increment by 1 every time the zone is triggered.

  • Page 55: Counter Storage And Reporting

    Counter Storage and Reporting Counter Storage and Reporting The counter storage and reporting service allows the device to store the values of any configured counters at regular intervals in up to 4 on-board databases. Any of the databases can be queried by the user to generate tables, graphs and reports of the data stored in the database.

  • Page 56: Enable Database Service

    Printed Documentation Enable Database Service The control for enabling/disabling the database service. This also functions as the master switch for all other counting and reporting functions - if the database service is not enabled, none of the other services will function. DB Storage Allows the user to select where the database tables are stored in physical memory.

  • Page 57: Database Management

    Counter Storage and Reporting The database allows up to 4 tables to be configured (0-3). Each table can sample the counter values at different intervals, thus allowing reports that cover different granularities and time windows to be generated by the user. Tables must be enabled in-order.

  • Page 58: Tabular Reporting

    Printed Documentation The essence of the counter reporting page is to select the query parameters and then select whether it should be displayed as a table, bar or exported to CSV. There are a number of pre-defined requests that offer quick and easy way to get started. Every element on the counter reporting page has context-sensitive help: just hover the mouse over the item in question to get detailed information about the values that can be entered into that field.

  • Page 59: Bar Graph Reporting

    Counter Storage and Reporting Bar Graph Reporting Clicking the Bar button pops up a new window with a bar graph of the results. The colour of each bar matches the colour of the counter on the Zones & Rules configuration page.

  • Page 60: Csv Export

    Printed Documentation CSV Export Clicking the CSV button offers a file that contains the results of the query in comma- separated-variable format.

  • Page 61: Predefined Requests

    Counter Storage and Reporting Predefined Requests The counter reporting service has a number of pre-defined requests that reflect the most common usage scenarios. It's possible to just select one of these pre-defined requests and click one of the reporting modes directly to generate a report in a very short amount of time. The requests available are: Predefined From...

  • Page 62: Command Request

    Printed Documentation In each case, the predefined queries populate the rest of the fields on the page, so it's simple to use a predefined query and then change just a couple of fields to customise it. Command Request In addition to using the predefined requests it's possible to select all query parameters manually to query any combination of data.

  • Page 63: Importing Data Into Microsoft Excel

    Counter Storage and Reporting yesterday+3600 2011/05/22 01:00 sunday 06:00 2011/05/22 06:00 Counter ID Allows specification of which counters are included in the request, can be any one of: Counter ID Details Example active All currently displayed counters 1,4,5,6 All counters 0-19 one of 0-19 An individual counter id...
  • Page 64 Printed Documentation The counter reporting service is compatible with Microsoft Excel's Import Data From Web function which allows users to extract a real-time data feed from one or many cameras and then use Excel's powerful data analysis functions to perform further data processing. On the counter reporting page, set up the query to generate the data view required.
  • Page 65 Counter Storage and Reporting The data is then displayed in Excel and can be processed further. In this example, the three counters have been added to a bar chart.
  • Page 66 Printed Documentation...

  • Page 67: Camera Calibration

    Camera Calibration Camera Calibration Camera calibration is required in order for the VCA engine to classify objects into different object classes. Once the camera has been calibrated, the engine can infer real-world object properties such as speed, height and area and classify objects accordingly. Camera Calibration Topics ...

  • Page 68: Other Graphical Tools

    Printed Documentation Other Graphical Tools There are a number of other graphical tools that can be used to make the calibration process simpler and more accurate. Horizon Display The horizon can be displayed by right clicking and checking the menu option. If the horizon is visible in the video, it is possible to use this to set the tilt angle.
  • Page 69 Camera Calibration Virtual Ruler The calibration configuration control supports a virtual ruler. This can be useful for measuring distances along the ground plane to objects of known size such as road lane widths, car park space widths etc. The virtual ruler is effectively a "measurement stick" that measures the distance between two points along the ground plane (not heights).

  • Page 70: Calibrating A Camera

    Printed Documentation Calibrating a Camera Calibrating a camera is necessary in order to estimate object parameters such as height, area, speed and classification. If you know the height, tilt angle and vertical field of view corresponding to your installation, you can simply type the parameters in the appropriate boxes and apply the changes.

  • Page 71: Step 2: Adjust Tilt Angle And Camera Height

    Camera Calibration Step 2: Adjust tilt angle and camera height Now, adjust the camera tilt angle and vertical field of view until both mimics are approximately the same size as a real person at that position in the scene. If an estimated height is entered then adjust this along with the other two parameters.

  • Page 72: Tip: If It All Goes Wrong

    Printed Documentation Once you are happy that the scene is correctly calibrated, verify the settings by dragging the mimics around and comparing them to other people or people-sized objects in the scene. The more locations in the scene where the calibration is verified, the more accurate the calibration will be.

  • Page 73: Vertical Field Of View

    Camera Calibration Vertical Field of View The vertical field of view is required when calibrating a camera. If you know the vertical field of view of the camera it can be entered directly. If however, you don't know the vertical field of view, it can be determined from the following table, given the vertical image dimension and its focal length: If you are unable to determine the vertical field of view for your camera from the above...
  • Page 74 Printed Documentation...

  • Page 75: Object Classification

    Object Classification Object Classification VCAsys can perform object classification once the camera has been calibrated. The object classification is based on properties extracted from the object including object area and speed. VCAsys comes pre-loaded with the most common object classes, and in most cases these will not need to be modified.

  • Page 77: Tamper Detection

    Tamper Detection Tamper Detection The Tamper Detection module is intended to detect camera tampering events such as bagging, de-focusing, moving the camera, etc. This is achieved by detecting large persistent changes in the image. The output of the tamper detection algorithm is displayed as red blocks on the image. The red area is where the algorithm has detected that the image has changed from its reference image.
  • Page 78 Printed Documentation Suppress alarm on lights on/off: Large fast changes to the image lighting such as switching on/off indoor lighting can cause false tamper alarms. Enable this option if this is likely to be a problem in the area where the camera is installed.

  • Page 79: Scene Change Detection

    Scene Change Detection Scene Change Detection The Scene Change Detection page allows the user to adjust the settings of the scene change detection algorithm. The scene change detection module resets the tracking algorithm when it detects a large persistent change in the image. This prevents the tracking algorithm from detecting image changes as tracked objects which can be potential sources of false alarms.
  • Page 80 Printed Documentation If false scene change detections are a problem, the time and/or area should be increased so that large transient changes such as a close object temporarily obscuring the camera do not cause false scene change detections.

  • Page 81: Burnt-In Annotation

    Burnt-in Annotation Burnt-in Annotation The Burnt-in Annotation setting allows the VCA annotation to be burnt in to the raw video stream. The annotation can include tracked objects, counters and system messages. The Burnt-in Annotation can be enabled for compressed video streams or the analogue video output, if supported.

  • Page 82: Counter Configuration

    Printed Documentation Select the object properties to display. The object text size can be changed according to the user's preferences. Objects can be displayed in either two-color or multi-color mode. In two- color mode, select the display colors for objects in alarm and objects not in alarm. In multi- color mode, the object colors are selected automatically by the system.
  • Page 83 Burnt-in Annotation...

  • Page 85: Ptz Configuration And Autotracking

    PTZ Configuration and AutoTracking PTZ General Configuration PTZ General Configuration allows configuration of general VCA PTZ support. This extends the VCA functions to work with PTZ cameras. The general PTZ configuration for VCA is controlled by the settings highlighted in the red box in the figure below. Camera Preset Number for VCA Home Position This text box specifies the PTZ camera preset number for VCA home position.

  • Page 86: Return To Home Position Following Manual Override

    Printed Documentation Return to Home Position Following Manual Override When checked, the PTZ camera will automatically return to the VCA home position following user control of the camera (manual override) after the specified timeout has elapsed. NOTE: If this function is disabled and the VCA is enabled only at the preset home position, VCA will not be automatically re-enabled.

  • Page 87: Maximum Tracking Time

    PTZ Configuration and AutoTracking Maximum Tracking Time Defines the maximum time that a subject is tracked for by the PTZ camera. Even if a subject is being tracked by the PTZ camera, the PTZ camera will stop auto tracking (and return to the VCA home preset position if configured) if this time elapses.

  • Page 88: Ptz Profile Configuration

    Printed Documentation  By drawing a box around any portion of the image. Simply hold the shift key and click to drag out the target area. PTZ autotracking will be initiated on the area indicated. Autotracking in progress: PTZ Profile Configuration PTZ Profile Configuration Since every PTZ camera has different characteristics and a different response (e.g.

  • Page 89: Editing An Existing Ptz Profile

    PTZ Configuration and AutoTracking There are two steps to create a new PTZ Profile: 1. Enter the name of the new PTZ profile to be created in the text box. 2. Click the "Create" button. The new PTZ profile will be created and stored in the list of available PTZ profiles. Editing an Existing PTZ Profile Note: Only PTZ profiles that have been created by the user can be edited.
  • Page 90 Printed Documentation PTZ General Info Specifies general information related to the PTZ camera profile. Version The PTZ profile version.
  • Page 91 PTZ Configuration and AutoTracking Description Detailed description for the PTZ profile, normally contains camera manufacturer and model number. Protocol The PTZ protocol for the current camera. Please refer to "IO Configuration"->"UART"->"PTZ Protocol" for all supported PTZ protocols. PTZ Auto-tracking Parameters Minimum pan/tilt speed The minimum value (as specified via the HTTP API) at which the camera starts to move in pan &...
  • Page 92 Printed Documentation No movement (dead) zone Percentage of screen width/height in the centre of the image where the PTZ won’t attempt to track the subject, normalized as a percentage(0-100%). In most cases this value does not need to be adjusted and values of between 15-20% should give satisfactory results. Minimum target size for zooming in Minimum target size (percentage of image width/height) to trigger the camera to zoom-in, normalized as a percentage (0-100%).
  • Page 93 PTZ Configuration and AutoTracking Zoom speed Camera zoom speed (percentage of maximum camera zoom speed) for both zoom in and out, normalized as a percentage (0-100%). Controls how fast the camera zooms in and out. Where the camera only supports a fixed zoom speed, this value needs to be set to anything other than 0.

  • Page 94: Removing A Ptz Profile

    Printed Documentation serial2.fcgi?write=ff010000000000 Removing a PTZ Profile To remove a user created PTZ profile: 1. Select the user created PTZ profile to be deleted in the drop down box. 2. Click the "Delete" button. Note: Only PTZ profiles that have been created by the user can be removed. There are a number of PTZ profiles that come as standard and these cannot be changed by the user.
  • Page 95 PTZ Configuration and AutoTracking Calibrating a camera automatically  Select the PTZ profile that should be calibrated.  Click the Calibrate button to start the process.  Wait for the process to complete (can be up to 5 minutes). You should notice the PTZ camera moving about at this point while the system tries to determine the tracking parameters.

  • Page 97: Stabilizer

    Stabilizer Stabilizer The video stabilizer utilizes advanced digital image stabilizing algorithms to minimise the effects of camera shake. The stabilizer is enabled and configured using the pages under the Stabilizer tab in the left menu. If the stabilizer functionality has been enabled by providing a VCA Stabilizer license, the option to enable the stabilizer will appear in the Enable/Disable page.

  • Page 98: Camera Installation Mode

    Printed Documentation output frames are shifted to keep the image features aligned to previous frames. This results in areas for which there is no image data available. The Border In-fill combo box lets you select what happens to those areas of the image. There are 5 options available: ...

  • Page 99: Performance

    Stabilizer  Low Detail: When this option is enabled, the algorithm is disabled when a scene with insufficient detail for reliable stabilization is detected. This prevents the image position 'hunting’ when there is very little scene detail or features. For example, when the camera is pointed at a completely blank wall the stabilized image will jump around slightly because it is locking on to the random video noise.

  • Page 101: Generating External Event Notifications

    Generating External Event Notifications It is possible to assign the VCA alarms to trigger external events, e.g. a relay contact closure, a TCP/IP message, etc. To access the event configuration select the Event Configuration menu and then the VCA sub menu: The external event notification will be generated every time a VCA alarm is generated.

  • Page 103: Load And Save Vca Settings

    Load and Save VCA Settings It is possible to export the VCA settings from a device to an XML configuration file, and to re- load the settings back into the device at a later date. This might be useful for demonstration purposes, where multiple detection scenarios can be stored in separate configuration files, or in a situation where multiple devices need to share some basic VCA configuration parameters.
  • Page 104 Printed Documentation Click the browse button to select the file to load. Select the types of VCA settings to load. By default all VCA settings will be loaded and applied to the unit. Click the Load button to load the settings and apply them to the unit.

  • Page 105: Advanced Vca Settings

    Advanced VCA Settings In most installations, the default VCA configuration will suffice. However, in some cases, better performance can be achieved with modified parameters. The Advanced VCA Settings page allows configuration of the advanced VCA parameters.

  • Page 106: Alarm Holdoff Time

    Printed Documentation Alarm Holdoff Time The Alarm Holdoff Time defines the time between the successive re-triggering of an alarm generated by the same object triggering the same rule.
  • Page 107 Advanced VCA Settings To explain this concept, consider the following diagram where no Alarm Holdoff Time is configured: In this detection scenario, the person enters the zone 3 times. At each point an alarm is raised, resulting in a total of 3 alarms. With the Alarm Holdoff Time configured, it's possible to prevent re-triggering of the same rule for the same object within the configured time period.

  • Page 108: Measurement Units

    Printed Documentation In this case, an alarm is not raised when the person enters the zone for the second time, because the time between the occurrence of the last alarm of the same type for the object is less than the Alarm Holdoff Time. When the person re-enters the zone for a third time, the elapsed time since the previous alarm of the same type for that object is greater than the Alarm Holdoff time and a new alarm is generated.

  • Page 109: Statistics

    Advanced VCA Settings Contains the values of any counters that have been configured. Statistics Contains data related to the statistical properties of objects such as object dwell time (VCApro only). Color Signature Contains the color signatures of each tracked object (VCApro only). Do not send empty metadata packets Check this option to save bandwidth consumed by the metadata.

  • Page 110: Tracking Options

    Printed Documentation The Stationary Object Hold-on Time defines the amount of time that an object will be tracked by the engine once it becomes stationary. Since objects which become stationary must be "merged" into the scene after some finite time, the tracking engine will forget about objects that have become stationary after the Stationary Object Hold-on Time.

  • Page 111: Restore All Default Settings

    Advanced VCA Settings The left picture shows the centroid mode, and the right one shows the Midbottom mode. Restore All Default Settings This button restores ALL VCA settings to their default values. This can be useful if the configuration of a device is in an unknown state. Note that by default, VCA is switched OFF. Therefore, VCA will need to be re-enabled if all VCA settings are restored to defaults.

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