Introduction

This quick guide discusses the individual register Height Filter settings available on Irisys Vector 4D devices, and how to configure them.

In order to access these settings, you must first make an initial connection to the Vector unit; see separate guide: Irisys Vector 4D - Making a Setup Connection.

Register Settings

Once you are connected to your Vector, the Register settings are accessed via the ‘Settings’ tab, then ‘Counting’. 

On the 'Registers' dialog window each register has its own settings that can be changed independently, simply by  clicking the Edit symbol, shown here. If the Registers window is not shown click the Registers button first:

The ‘Edit Registers’ dialog will then open.

Height Filtering

Height filtering means that a register will only increment when both:

  • a person crosses the corresponding count line
  • they adhere to the height filter settings

This is commonly used to count only adults or only children, based on their height.

By default the height filtering will be disabled, meaning no one is excluded from the register totals. To enable height filtering, place a tick in the checkbox:

Once enabled, Height Filtering simply requires Lower and Upper Height Bounds to be entered. Anyone who crosses the line whose height is below the Lower bound will be ignored and similarly anyone who crosses the line who is taller than the Upper Bound will also be ignored.

Remember to click the ‘Save Register’ button after making register settings changes.
The Height Filtering at register level, is different to the Global Height Filtering option which is also available. Global height filtering affects everyone walking through the field of view.

Below is an example of two registers configured with Height Filtering - one to count Adults and one for Children. The height filtering cutoff point has been set to 1.2m i this example.

The corresponding lines associated with these registers should be placed in the appropriate direction the within the Vector’s field of view.

If the same counts are required in the OUT direction, then two similar registers should be added, with the corresponding count lines configured to count in the opposite direction.

Using height as a basis for differentiating between adults and children is very subjective, and also very difficult to validate. It is recommended that the Height Histogram data is evaluated first on order to determine a good cut off height between adults and children for each new location – see separate document on Height Histograms.
If necessary, the total count for a specific direction should be used for accuracy validation purposes.