Blueberry bruise detection by pulse-phase thermography

As part of an ongoing grant to analyze blueberry damage during harvesting and processing, new sensing technologies are being explored for detection of blueberry bruises. In pulse-phase thermography, the inspection target (berries) are heated by thermal radiation, and their change in temperature over time is monitored by a thermal camera. By closely inspecting and comparing the rates of heating and cooling of bruised and healthy berries, it may be possible to differentiate between them.

Imaging system diagram

Fourier transform figure v2

four phasegrams

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