{"id":2262,"date":"2019-07-11T17:22:31","date_gmt":"2019-07-11T09:22:31","guid":{"rendered":"https:\/\/www.agrinoon.com\/agriculture\/?p=2262"},"modified":"2019-07-11T17:22:31","modified_gmt":"2019-07-11T09:22:31","slug":"robot-uses-machine-learning-harvest-lettuce","status":"publish","type":"post","link":"https:\/\/www.agrinoon.com\/agriculture\/2019\/07\/11\/robot-uses-machine-learning-harvest-lettuce\/","title":{"rendered":"Robot uses machine learning to harvest lettuce"},"content":{"rendered":"
A vegetable-picking robot that uses machine learning to identify and harvest a commonplace, but challenging, agricultural crop has been developed by engineers.<\/div>\n
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The \u2018Vegebot\u2019, developed by a team at the University of Cambridge, was initially trained to recognise and harvest iceberg lettuce in a lab setting. It has now been successfully tested in a variety of field conditions in cooperation with G\u2019s Growers, a local fruit and vegetable co-operative.<\/div>\n
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Although the prototype is nowhere near as fast or efficient as a human worker, it demonstrates how the use of robotics in agriculture might be expanded, even for crops like iceberg lettuce which are particularly challenging to harvest mechanically. The\u00a0results<\/a>\u00a0are published in\u00a0The Journal of Field Robotics.<\/em><\/span><\/div>\n
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Crops such as potatoes and wheat have been harvested mechanically at scale for decades, but many other crops have to date resisted automation. Iceberg lettuce is one such crop. Although it is the most common type of lettuce grown in the UK, iceberg is easily damaged and grows relatively flat to the ground, presenting a challenge for robotic harvesters.<\/div>\n
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\u201cEvery field is different, every lettuce is different,\u201d said co-author Simon Birrell from Cambridge\u2019s Department of Engineering. \u201cBut if we can make a robotic harvester work with iceberg lettuce, we could also make it work with many other crops.\u201d<\/div>\n
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\u201cAt the moment, harvesting is the only part of the lettuce life cycle that is done manually, and it\u2019s very physically demanding,\u201d said co-author Julia Cai, who worked on the computer vision components of the Vegebot while she was an undergraduate student in the lab of Dr Fumiya Iida.<\/div>\n
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The Vegebot first identifies the \u2018target\u2019 crop within its field of vision, then determines whether a particular lettuce is healthy and ready to be harvested, and finally cuts the lettuce from the rest of the plant without crushing it so that it is \u2018supermarket ready\u2019. \u201cFor a human, the entire process takes a couple of seconds, but it\u2019s a really challenging problem for a robot,\u201d said co-author Josie Hughes.<\/div>\n
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The Vegebot has two main components: a computer vision system and a cutting system. The overhead camera on the Vegebot takes an image of the lettuce field and first identifies all the lettuces in the image, and then for each lettuce, classifies whether it should be harvested or not. A lettuce might be rejected because it\u2019s not yet mature, or it might have a disease that could spread to other lettuces in the harvest.<\/div>\n
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The researchers developed and trained a machine learning algorithm on example images of lettuces. Once the Vegebot could recognise healthy lettuces in the lab, it was then trained in the field, in a variety of weather conditions, on thousands of real lettuces.<\/div>\n
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A second camera on the Vegebot is positioned near the cutting blade and helps ensure a smooth cut. The researchers were also able to adjust the pressure in the robot\u2019s gripping arm so that it held the lettuce firmly enough not to drop it, but not so firm as to crush it. The force of the grip can be adjusted for other crops.<\/div>\n
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\u201cWe wanted to develop approaches that weren\u2019t necessarily specific to iceberg lettuce so that they can be used for other types of above-ground crops,\u201d said Iida, who leads the team behind the research.<\/div>\n
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In future, robotic harvesters could help address problems with labour shortages in agriculture, and could also help reduce food waste. At the moment, each field is typically harvested once, and any unripe vegetables or fruits are discarded. However, a robotic harvester could be trained to pick only ripe vegetables, and since it could harvest around the clock, it could perform multiple passes on the same field, returning at a later date to harvest the vegetables that were unripe during previous passes.<\/div>\n
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\u201cWe\u2019re also collecting lots of data about lettuce, which could be used to improve efficiency, such as which fields have the highest yields,\u201d said Hughes. \u201cWe\u2019ve still got to speed our Vegebot up to the point where it could compete with a human, but we think robots have lots of potential in agri-tech.\u201d<\/div>\n
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Iida\u2019s group at Cambridge is also part of the world\u2019s first\u00a0Centre for Doctoral Training (CDT)\u00a0<\/a>in agri-food robotics. In collaboration with researchers at the University of Lincoln and the University of East Anglia, the Cambridge researchers will train the next generation of specialists in robotics and autonomous systems for application in the agri-tech sector. The Engineering and Physical Sciences Research Council (EPSRC) has awarded \u00a36.6m for the new CDT, which will support at least 50 PhD students.<\/span><\/div>\n
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Source:<\/strong>\u00a0Cambridge University<\/a><\/span><\/h4>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

A vegetable-picking robot that uses machine learning to identify and harvest a commonplace, but challenging, agricultural crop has been developed by engineers. The \u2018Vegebot\u2019, developed by a team at the University of Cambridge, was initially trained to recognise and harvest iceberg lettuce in a lab setting. It has now been successfully tested in a variety… Continue reading Robot uses machine learning to harvest lettuce<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-2262","post","type-post","status-publish","format-standard","hentry","category-industry-news","entry"],"yoast_head":"\nRobot uses machine learning to harvest lettuce - agrinoon<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.agrinoon.com\/agriculture\/2019\/07\/11\/robot-uses-machine-learning-harvest-lettuce\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Robot uses machine learning to harvest lettuce - agrinoon\" \/>\n<meta property=\"og:description\" content=\"A vegetable-picking robot that uses machine learning to identify and harvest a commonplace, but challenging, agricultural crop has been developed by engineers. 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