About CAWA SCAN
Technology in service of coffee farmers
CAWA SCAN is an agricultural technology initiative exploring how image-based artificial intelligence can help farmers understand possible crop-health problems and access relevant agricultural information.
The problem
Leaf problems are easy to miss and hard to name
Coffee is one of Uganda's most important crops, and many farmers grow it on small plots. When leaves start to change colour or show spots, it is not always clear what is happening or whether it is serious. Expert advice is valuable, but it is not always close at hand when a problem first appears.
CAWA SCAN aims to give farmers a quick first look at possible leaf problems from a phone photo, together with plain information about what to check and when to ask an extension worker.
Coffee first
The first version focuses only on coffee leaves, starting with healthy leaves, coffee leaf rust and Phoma. Doing one crop carefully comes before doing many.
Honest about limits
Results are presented as AI-assisted information, not a diagnosis. When the AI cannot tell, CAWA SCAN says so instead of guessing.
A longer road
Maize, banana, tomato and beans are on the roadmap. Each will be added only after detection has been built and tested for that crop.
Where the project stands
- CAWA SCAN is a prototype. The AI service that analyses photos is still being selected and tested on coffee leaf images.
- Disease information and learning articles are drafts awaiting review by an agricultural specialist.
- CAWA SCAN has no field-trial results, institutional endorsements or partnerships to report yet. We will only publish such information when it exists.
Photo credits
Photographs are loaded from Unsplash and Wikimedia Commons and are used under the licences shown. The CAWA SCAN logo belongs to the CAWA SCAN team.
- A Ugandan coffee farmer picking ripe coffee cherries, by Jameswasswa (CC BY-SA 4.0, Wikimedia Commons)
- Coffee farmers in Uganda working among coffee trees, by Jameswasswa (CC BY-SA 4.0, Wikimedia Commons)
- A farmer's hand holding a branch heavy with coffee cherries, by Jameswasswa (CC BY-SA 4.0, Wikimedia Commons)
- Ripe red coffee cherries held in a farmer's open hands, by Jameswasswa (CC BY-SA 4.0, Wikimedia Commons)
- Coffee bushes growing under banana plants on a farm in Uganda, by Kateregga1 (CC BY-SA 4.0, Wikimedia Commons)
- A farmer reaching into a coffee bush to pick cherries, by Nel Ranoko (Unsplash License, Unsplash)
- A smiling woman farmer standing among green crops, by Lisa Marie Theck (Unsplash License, Unsplash)
- A young woman farmer in the shade of a tree, by Lisa Marie Theck (Unsplash License, Unsplash)
- A farmer checking his crops in a green field, by Richard Nyoni (Unsplash License, Unsplash)
- Women farmers working a hillside garden, one carrying a child on her back, by Annie Spratt (Unsplash License, Unsplash)
- A smiling woman farmer kneeling in her garden, by Annie Spratt (Unsplash License, Unsplash)
- Hands picking ripe coffee cherries from a branch, by LIVESTART STIVEN (Unsplash License, Unsplash)
- Hands dropping ripe red coffee cherries into a full basket, by LIVESTART STIVEN (Unsplash License, Unsplash)
- A palm full of freshly picked red coffee cherries, by George Dagerotip (Unsplash License, Unsplash)
- A hand picking a ripe coffee cherry from a branch, by Faris Ristiansyah (Unsplash License, Unsplash)
- Glossy dark green coffee leaves with ripening cherries, by Allec Gomes (Unsplash License, Unsplash)
- Healthy coffee leaves around a cluster of green coffee cherries, by Aditya Hegde (Unsplash License, Unsplash)
- A cluster of coffee cherries ripening from green to red, by eli hirtzel (Unsplash License, Unsplash)
- Coffee cherries ripening along a branch, by dennis epema (Unsplash License, Unsplash)
- Coffee plants in white blossom on a hillside, by PROJETO CAFÉ GATO-MOURISCO (Unsplash License, Unsplash)
- Rows of coffee plants on a hillside with mountains behind, by PROJETO CAFÉ GATO-MOURISCO (Unsplash License, Unsplash)
- Coffee branches heavy with red and green cherries, by PROJETO CAFÉ GATO-MOURISCO (Unsplash License, Unsplash)
- A green farming valley surrounded by hills, by Dhan Sugui (Unsplash License, Unsplash)
- Coffee drying in the sun on raised beds, by Michael Starkie (Unsplash License, Unsplash)
- Green coffee cherries growing on a tree branch, by Michael Starkie (Unsplash License, Unsplash)
- Red, orange and green coffee cherries among leaves, by Clint McKoy (Unsplash License, Unsplash)
- Glossy dark green coffee leaves growing in pairs along a branch, by Frank Schulenburg (CC BY-SA 3.0, Wikimedia Commons)
- Robusta coffee leaves photographed against red soil, by Vinayaraj (CC BY-SA 4.0, Wikimedia Commons)
- Coffee leaf with orange powdery rust spots spread across its surface, by Carvalho et al. (CC BY 2.5, Wikimedia Commons)
- A hand turning over a coffee leaf to show orange rust patches on the underside, by Smartse (CC BY-SA 3.0, Wikimedia Commons)
- Coffee leaves with rust spots on a farm in Kenya, by Daniel Case (CC BY-SA 4.0, Wikimedia Commons)
- Young coffee plant with a browning patch on the edge of a lower leaf (photograph labelled as Phoma on coffee; awaiting expert confirmation), by Victor M. Vicente Selvas (CC BY-SA 4.0, Wikimedia Commons)