Year: 2026
Type: article
Abstract: We report on a method to determine whether alcohol has been consumed using camera-based, non-contact imaging photoplethysmography (IPPG) technology. IPPG signals were collected using a visible-band CMOS camera and a 520 nm light-emitting diode (LED). The light source was set to a uniform light output of 2.8 mW/cm², and images were captured at 150 frames per second. To compare signal changes before and after alcohol consumption, hairless mice were orally administered alcohol, and IPPG signals were collected hourly. Signal analysis assessed alcohol consumption over time using frequency components of respiration and heart rate, second-harmonic components, and the frequency-to-magnitude ratio. Furthermore, alcohol consumption was assessed by analyzing the magnitude ratio and scatter plot at various frequencies, and the system's validity was confirmed through repeated experiments. These results clearly demonstrate that non-contact IPPG technology can be used as an effective and reliable tool for detecting alcohol consumption.
Source: Scientific Reports
Authors: Jea Young Choi, Kanghae Kim, Joo Beom Eom
Institution: Dankook University
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
Funder: Dankook University
OpenAlex ID: W7161635366
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