IVS/Global Setup

Revision as of 22:53, 5 August 2019 by Marques.Phillips (talk | contribs)

Global Setup

Description

This article will show you how to set the global rules for IVS analysis.

Depth of field calibration allows the camera to determine the corresponding relationship between the 2D image captured by the camera and the actual 3D object using one horizontal ruler and three vertical rulers that are defined by the user using the corresponding actual distance.

Note: Global setup is for the Fast-Moving IVS feature

Prerequisites

  • Supported device with IVS feature

Metric to Imperial Conversion

  • 1 Meter = 3.28 Feet
  • 2 Meters = 6.56 Feet
  • 3 Meters = 9.84 Feet

Global Setup Best Practices

  • The camera must be installed at a medium or distant view with an installation height of more than 3 meters.
  • Scenes with parallel view or ceiling mounted are not supported
  • Horizontal surfaces can be calibrated, not vertical walls or sloping surfaces
  • Not applicable for scenes that have a distorted view such as captured by super wide-angle or a fisheye camera


Vertical rulers: Three rulers must be created. Select three reference objects with fixed height that are positioned in a triangular distribution

Horizontal ruler: Use a reference object with a known length such as a sign on the road or make an actual measurement of the ground

The scene for this example has been measured and marked with tape to use as a guide.

Video Instructions

Coming Soon

Step by Step Instructions

1. Log into the web interface of the camera

IVS Global Setup - 1.jpg

2. Click Setting

IVS Global Setup - 2.jpg

3. Click Event > IVS

Click the tab labeled 'Global Setup'

IVS Global Setup - 3.jpg

4. The calibration zone must be created

Click inside the video frame to draw a frame


IVS Global Setup - 4.jpg

5. Left click to draw - This frame must include all of the objects/areas being used as a reference for the rulers

IVS Global Setup - 5.jpg

IVS Global Setup - 5-1.jpg

6. The 3 vertical reference rules must be drawn.

These objects must be identical in height.

Toggle the button next to Vertical then click Add Rules

Then click inside the video frame to drag and draw the line

IVS Global Setup - 6.jpg


7. One Vertical ruler has been created in this scene

IVS Global Setup - 7.jpg

8.Repeat the same process twice to create 2 more Vertical rulers in the scene

IVS Global Setup - 8.jpg


9. The horizontal reference rule must be drawn.

Toggle the button next to Horizontal then click Add Rules

Then click inside the video frame to drag and draw the line

IVS Global Setup - 9.jpg

10. All rules complete

IVS Global Setup - 10.jpg

11. Enter the actual length of the created Rulers by first selecting the Rule in the list above then entering the value in the 'Actual Length' field (in meters)

IVS Global Setup - 11.jpg

12. Click Save once all parameters have been set

IVS Global Setup - 12.jpg


13. To test calibration accuracy:

  • Use the drop-down to select from Height or Weight Verification
  • Click Calibration Validation

IVS Global Setup - 13.jpg

Left click inside the Calibrate Region to draw a line


IVS Global Setup - 14.jpg

Zoomed:

IVS Global Setup - Calibration Validation Zoomed .jpg

Sign used as reference:

Vertical Object - Real Estate Sign.JPG

In this example the Calibration appears to be correct, the drawn line reports a value of 1.70

Sign measures 5 feet 10 inches = 1.778 meters


In the case of a major difference between the estimated value and the actual one, fine-tune or reset the parameters until the error requirement is met.