Introduction

Impero Wellbeing subscribers get exclusive access to the viewed word capture system, that triggers full screen captures on devices when certain words are detected. These captures are then sent to Impero Backdrop where users with the appropriate access can perform a triage against them with actions such raise a concern or mark as false positive. For more details on capture triage, click on the following link.

Users can deploy a Backdrop device client application. This application connects to Backdrop and downloads keyword lists covering a wide variety of e-safety categories including, for example, weapons and violence, bullying, or radicalisation. Users can also create their own collection of custom keyword lists. For more details on keyword lists, click on the following link.

When a keyword is detected on-screen capture is silently taken and sent to Backdrop listing Who, When, and What.

Who – The identified user on the device when the capture was triggered.

When – The time and date the capture was triggered.

What – The keyword term that triggered the capture.

Device Client Applications

All the device client applications provide the functions listed above and it is important to understand how each platform delivers that functionality. We strive for parity across platforms but sometimes restrictions on certain device types mean that a different approach is necessary.

Windows

Captures viewed words across all applications and across all device displays. Scans the device display once every 50 seconds; this allows time for the previous scan to complete.

Once a capture is taken for a viewed word, that word is not going to be recaptured for the next 3 minutes, (scanning still happens during this period). This is to prevent Backdrop from being put under excessive load.

The scans are conducted with OCR (Optical Character Recognition) and rely on the ‘tessdata’ folder found in the install location. Written word captures runs in parallel to viewed word captures.

Prior to using Wellbeing, make sure that you are aware of the known limitations:

• Scans for words only in English currently.
• Does not work as well with applications that use the ‘dark mode’ theme.
• Looks for single words only, ‘hiding bruise’ and other phrases do not trigger.

ChromeOS

Captures viewed words in the current active in-focus web page in the Chrome browser. Scans the device display once every 50 seconds; this allows time for the previous scan to complete.

Once a capture is taken for a viewed word we scan the HTML on that web page to look for further instances of that word. We record up to 5 instances of that word and record the keyword context (100 characters before and 100 characters after the word) and add them to the capture event to send to Backdrop. Once a word is captured then a cooldown timer begins ensuring we don't capture the same word for 3 minutes (scanning still happens during this period). This is to prevent Backdrop from being put under excessive load.

The scans are conducted with OCR (Optical Character Recognition). Written word captures run in parallel to viewed word captures.

Prior to using Wellbeing, make sure that you are aware of the known limitations:

• Does not work as well with applications that use the ‘dark mode’ theme.

Android

iOS

Captures viewed words in the current active in-focus web page in the Impero browser. Scans the device display once every 50 seconds; this allows time for the previous scan to complete.

Once a capture is taken for a viewed word we scan the HTML on that web page to look for further instances of that word. We record up to 5 instances of that word and record the keyword context (100 characters before and 100 characters after the word) and add them to the capture event to send to Backdrop. Once a word is captured then a cooldown timer begins ensuring we don't capture the same word for 3 minutes (scanning still happens during this period). This is to prevent Backdrop from being put under excessive load.

The scans are conducted with OCR (Optical Character Recognition). Written word captures run in parallel to viewed word captures.

Prior to using Wellbeing, make sure that you are aware of the known limitations:

• Does not work as well with applications that use the ‘dark mode’ theme.