Manual
Table Of Contents
- Introduction
- Getting Started
- VCA Feature Packages
- Accessing VCA Configuration
- Activation
- Obtaining an Activation Code
- Applying an Activation Code to a Unit
- Switching VCA On and Off
- Enabling Metadata Streaming
- Configuration of Zones and Rules
- Customizing the Tracking Display
- Creating Detection Zones and Lines
- Creating a Zone or Line
- Non-Detection Zones
- Detection Rules
- Object Presence
- Object Direction
- Object Enter and Exit
- Object Appear and Disappear
- Object Dwell
- Object Stopped
- Object Class
- Object Tailgating
- Object Speed
- Object Color Filter
- Counting Line
- Camera Calibration
- Calibration Page Elements
- Calibrating a Camera
- Advanced Calibration Parameters
- Vertical Field of View
- Measurement Units
- Object Classification
- Logical Rules
- Adding and Removing Logical Rules
- Editing Logical Rule Clauses
- Editing Logical Rule Actions
- Clause Types
- Action Types
- Counters
- Creating Counters
- Assigning Rules to Counters
- Counter Storage and Reporting
- Counter Database Service
- Counter Reporting Service
- Email Notification
- Enable Email Notification
- Adding a New Email Notification Recipient
- Email Configuration
- Name
- Description
- Email Address
- Schedule Configuration
- Current Device Time
- Enable Hourly Report
- Trigger Time
- Weekday
- Enable Daily Report
- Trigger Time
- Weekday
- Enable Weekly Report
- Trigger Day
- Trigger Time
- Enable Monthly Report
- Trigger Day
- Trigger Time
- Report Configuration
- Time
- Report All Data
- Time Range
- Counter ID
- Table (Sampling)
- Sorting Order
- Value Type
- Format
- Send Test Report
- Importing Data into Microsoft Excel
- Other Reports
- Heatmap Reporting
- Events Reporting
- Tracks Reporting
- Tamper Detection
- Scene Change Detection
- Burnt-in Annotation
- PTZ Profiles
- PTZ Control Element
- Configure a PTZ Preset
- Create VCA Profile
- Delete VCA Profile
- Disable PTZ Preset
- PTZ Configuration and Auto-Tracking
- PTZ General Configuration
- PTZ Auto-tracking Configuration
- Importing & Exporting VCA Configuration
- Generating External Event Notifications
- Advanced VCA Settings
- Alarm Holdoff Time
- Measurement Units
- Metadata Format
- Event
- Object
- Counting
- Do not send empty metadata packets
- Blob
- Tamper Diagnostics
- Counting Line Diagnostics
- Scene Change Diagnostics
- More Information
- Stationary Object Hold-on Time
- Tracking Options
- Minimum Tracked Object Size
- Display Options
- Minimum Alarm Object Display Time
- Minimum Object Display Time
- Detection Point of Tracked objects
- People Tracker
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Ganz GXi Series VCA Interface Manual V3.05.31.18
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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. Once enough of
the image has changed and remained so for a certain length of time, a tamper alarm is triggered.
Note: To see the output of the tamper detection on the image, Tamper Debug metadata must be enabled
on the VCA -> Advanced page. Please refer to Advanced Settings for more information.
Advanced Tamper Detection Settings
In the advanced tamper detection settings, it is possible to change the thresholds for the area of the
image which must be changed and the length of time it must be changed for before the alarm is triggered.
• Tampered Duration until Alarm: The length of time that the image must be persistently changed
before the alarm is triggered.
• Tampered Image Area: Percentage area of the image which must be changed for tampering to
be triggered.
If false alarms are a problem the duration and/or area should be increased so that large transient
changes such as a close object temporarily obscuring the camera do not cause false alarms.
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.
However, this option will reduce sensitivity to genuine alarms, so it is not recommended if fast light
changes are not likely to be a problem