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Video Exposure Monitoring (VEM) is a technique that uses synchronized real-time (or near real-time) instruments that collect chemical, biological, radiological, and physical agent data, with video equipment that records workers’ and workplace activities.

Rationales for implementing VEM

Exposure to some environmental factors is difficult to sense with human sense organs.
The visualisation of invisible variables in the video picture can help to discover dependence between visible events and some easily measurable, but not visible variable.
The PIMEX method (abbreviation for PIcture Mixed EXposure) is successfully used to visualise invisible physical variables.

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The PIMEX method

The PIMEX method is based on a combination of direct-reading instruments and video filming.
The measurement instruments for environmental or other factors are connected to the equipment.
Concurrently with the measurement, the work or other event under investigation is filmed.
Signals from the video camera and the measurement instrument are mixed to give information on the current level of the measured variable.