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COVID-19


High-speed camera reveals sneeze aerosols travel 7-8m


Research at MIT using high-speed cameras has shown that aerosols from a sneeze could travel up to seven to eight metres. Te work is part of the evidence that


health officials have to weigh up as to whether to advise citizens to wear face masks in public places. Te MIT research was carried out by Lydia


Bourouiba. In the paper she said: 'Given the turbulent puff cloud dynamic model, recommendations for separations of 3 to 6 feet (1-2m) may underestimate the distance, timescale, and persistence over which the cloud and its pathogenic payload travel, thus


‘Micro-droplets carry many viruses. We produce them when we talk loudly or breathe heavily'


generating an underappreciated potential exposure range for a healthcare worker.' Te study analysed video recorded at


2,000 frames per second. During a sneeze air and moisture droplets can be expelled at 10 to 30m/s. In a separate study, scientists at Toho


University in Japan have shown how micro- droplets released in conversation can drift through the air and potentially contribute to the spread of coronavirus. Te team used laser beams and a high-


sensitivity camera to visualise how micro- droplets as small as 0.1µm wide travelled between two people having a conversation. Although the droplets didn't spread as far through the air as through a sneeze, they could be seen floating in the air. 'Micro-droplets carry many viruses.


We produce them when we talk loudly or breathe heavily. People around us inhale them, and that's how the virus spreads. We're beginning to see this risk now,' said Kazuhiro Tateda, president of the Japanese Association for Infectious Disease.


Elsewhere, German laser imaging


company Lavision has shown how exhaled air can be reduced using a face mask by visualising the air flow caused by a person breathing and coughing. Te company created a video using a


Schlieren imaging technique, whereby a random dot pattern in the background of the flow is imaged with a high resolution camera before and during the test. By comparing the two pictures, the local displacement of the background pattern caused by the flow of gases can be seen.


Virtual business conference organised for June By Thomas Lübkemeier


Following the postponement of the physical EMVA business conference in Sofia until next year - it will now take place from 10 to 12 June 2021 – the EMVA is organising a one-day virtual business conference in 2020, scheduled for 26 June. Technical presentation topics include: new approaches to 3D vision; vision-based autonomous navigation; artificial intelligence learning


at the edge - application to integration-free quality control; and machine learning and artificial intelligence for automated visual inspection. The closing keynote - trust in the age of fake realities: why the virtual economy needs more common sense - will be held by Dr Stephan Sigrist, founder and head of the think tank W.I.R.E. In addition, participants can


arrange in advance bilateral networking video calls during the conference breaks - these take the place of the B2B meetings that are an integral part of the physical conference. In order to contribute to the


international fight against Covid-19, the EMVA has decided


8 IMAGING AND MACHINE VISION EUROPE JUNE/JULY 2020


to donate all conference registration fees to the Covid-19 Solidarity Response Fund run by the World Health Organisation. Further details about the virtual conference and registration can be found at: https://bc-2020-virtual. emva.b2match.io/. Another EMVA event, the


European Machine Vision Forum, which was scheduled to take place in September 2020 in Cork, Ireland, has now been postponed until next year, from 9 to 10 September 2021.


Industry survey and knowledge centre The EMVA is currently conducting a detailed written online survey on


the consequences of the coronavirus pandemic in the machine vision industry. All stakeholders in the industry are invited to participate at www.surveymonkey.de/r/ W6LWV7K. The survey is complemented by a series of interviews on the topic with selected representatives of the industry. The EMVA is also supporting the machine vision industry with a new ‘vision knowledge centre’, to go online on its website. Users will find free access to video recordings of selected lectures at recent EMVA events. The initiative is expected to make an important contribution to knowledge transfer in machine vision.


@imveurope | www.imveurope.com


Josep Suria/Shutterstock.com


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