Guy Coleman
@geezacoleman.bsky.social
Post-doc at the University of Copenhagen in ML/weeds | passionate about open-source tech
Creating the OpenWeedLocator - DIY weed detection. Build yours here!
https://github.com/geezacoleman/OpenWeedLocator
Creating the OpenWeedLocator - DIY weed detection. Build yours here!
https://github.com/geezacoleman/OpenWeedLocator
Making the most of the trail running while in Spain
November 10, 2025 at 8:26 PM
Making the most of the trail running while in Spain
So exciting to finally get this in a cab and running.
It's been a long-held goal to get a proper OWL controller working that ran over a network and could scale, instead of just GPIO based.
#agsky
It's been a long-held goal to get a proper OWL controller working that ran over a network and could scale, instead of just GPIO based.
#agsky
November 4, 2025 at 2:13 PM
So exciting to finally get this in a cab and running.
It's been a long-held goal to get a proper OWL controller working that ran over a network and could scale, instead of just GPIO based.
#agsky
It's been a long-held goal to get a proper OWL controller working that ran over a network and could scale, instead of just GPIO based.
#agsky
A long time coming - but a true networked, MQTT-based controller for an OWL boom.
Manage as many OWLs as your network can handle, remotely.
#agsky
Manage as many OWLs as your network can handle, remotely.
#agsky
November 3, 2025 at 11:16 PM
A long time coming - but a true networked, MQTT-based controller for an OWL boom.
Manage as many OWLs as your network can handle, remotely.
#agsky
Manage as many OWLs as your network can handle, remotely.
#agsky
An OWL set up for weed detection and spot spraying trials on an Amiga robot by Texas A&M PhD students Bholu and Vijai.
First of its kind on this robotic platform
#opensource #agsky
First of its kind on this robotic platform
#opensource #agsky
October 26, 2025 at 12:07 PM
An OWL set up for weed detection and spot spraying trials on an Amiga robot by Texas A&M PhD students Bholu and Vijai.
First of its kind on this robotic platform
#opensource #agsky
First of its kind on this robotic platform
#opensource #agsky
October 6, 2025 at 1:41 PM
Every plant imaged three times over three days to get a mean model prediction. Using a Sony Alpha A7IV for imaging.
Would absolutely automate this for a future experiment...
#agsky
Would absolutely automate this for a future experiment...
#agsky
September 27, 2025 at 6:58 PM
Every plant imaged three times over three days to get a mean model prediction. Using a Sony Alpha A7IV for imaging.
Would absolutely automate this for a future experiment...
#agsky
Would absolutely automate this for a future experiment...
#agsky
Differences between the third generation of high and low wheat similarity ryegrass are pretty clear through the camera lens.
So much more reflective leaf surface facing the camera, compared to the wheat-mimetic.
All 3 selections made by a wheat-ryegrass classification algorithm. No human input.
So much more reflective leaf surface facing the camera, compared to the wheat-mimetic.
All 3 selections made by a wheat-ryegrass classification algorithm. No human input.
September 24, 2025 at 5:12 PM
Differences between the third generation of high and low wheat similarity ryegrass are pretty clear through the camera lens.
So much more reflective leaf surface facing the camera, compared to the wheat-mimetic.
All 3 selections made by a wheat-ryegrass classification algorithm. No human input.
So much more reflective leaf surface facing the camera, compared to the wheat-mimetic.
All 3 selections made by a wheat-ryegrass classification algorithm. No human input.
Looks very pretty with the randomised design and colourful labels now.
First time seeing the F3 high similarity population - exciting times
First time seeing the F3 high similarity population - exciting times
September 6, 2025 at 4:09 PM
Looks very pretty with the randomised design and colourful labels now.
First time seeing the F3 high similarity population - exciting times
First time seeing the F3 high similarity population - exciting times
Interim results from the PhD would suggest that, yes, image classification algorithms can drive morphological changes in plants towards a mimetic phenotype.
September 3, 2025 at 2:25 PM
Interim results from the PhD would suggest that, yes, image classification algorithms can drive morphological changes in plants towards a mimetic phenotype.
The final 720 pots in a three year experiment.
Can weeds evolve to avoid being detected by cameras?
Can weeds evolve to avoid being detected by cameras?
September 3, 2025 at 2:19 PM
The final 720 pots in a three year experiment.
Can weeds evolve to avoid being detected by cameras?
Can weeds evolve to avoid being detected by cameras?
Pretty cool to see targeted steam/hot water applications using presumedly WeedITs or similar here in 🇩🇰.
Have oversaturated the photo so the blue line is more obvious. Very compact machine.
#agsky
Have oversaturated the photo so the blue line is more obvious. Very compact machine.
#agsky
August 15, 2025 at 7:16 AM
Pretty cool to see targeted steam/hot water applications using presumedly WeedITs or similar here in 🇩🇰.
Have oversaturated the photo so the blue line is more obvious. Very compact machine.
#agsky
Have oversaturated the photo so the blue line is more obvious. Very compact machine.
#agsky
Finally got the MQTT-based operation of the OWL to some form of usefulness.
Only takes two lines to set the whole thing up:
git clone
bash owl_setup.sh
The interface lets you monitor, control and download data to check its quality.
Only takes two lines to set the whole thing up:
git clone
bash owl_setup.sh
The interface lets you monitor, control and download data to check its quality.
July 10, 2025 at 9:56 PM
Finally got the MQTT-based operation of the OWL to some form of usefulness.
Only takes two lines to set the whole thing up:
git clone
bash owl_setup.sh
The interface lets you monitor, control and download data to check its quality.
Only takes two lines to set the whole thing up:
git clone
bash owl_setup.sh
The interface lets you monitor, control and download data to check its quality.
It's weirdly nostalgic finding a @raspberrypi.com 3B+ from 2018 with my very early days Python code on it.
self.self = self
I guess? This Pi will never be updated.
self.self = self
I guess? This Pi will never be updated.
June 26, 2025 at 9:40 PM
It's weirdly nostalgic finding a @raspberrypi.com 3B+ from 2018 with my very early days Python code on it.
self.self = self
I guess? This Pi will never be updated.
self.self = self
I guess? This Pi will never be updated.
An OWL building workshop with 11 farmers from Western Aus!
Lots of great feedback on the build process.
Lots of great feedback on the build process.
June 24, 2025 at 9:03 PM
An OWL building workshop with 11 farmers from Western Aus!
Lots of great feedback on the build process.
Lots of great feedback on the build process.
Close up of the board itself. Wiring was definitely a hassle, but decided for extra connectors so the lasers wouldn't always be stuck in this.
June 21, 2025 at 7:38 PM
Close up of the board itself. Wiring was definitely a hassle, but decided for extra connectors so the lasers wouldn't always be stuck in this.
Set up a 16 channel laser demo for the OpenWeedLocator using the new 16 channel control board.
Plan is to make precision weed control in horticulture more accessible.
Plan is to make precision weed control in horticulture more accessible.
June 21, 2025 at 7:37 PM
Set up a 16 channel laser demo for the OpenWeedLocator using the new 16 channel control board.
Plan is to make precision weed control in horticulture more accessible.
Plan is to make precision weed control in horticulture more accessible.
Box next to the OWL controller.
I think learning how to make PCBs and not spending 2 days wiring this would be more productive...
I think learning how to make PCBs and not spending 2 days wiring this would be more productive...
June 10, 2025 at 10:04 PM
Box next to the OWL controller.
I think learning how to make PCBs and not spending 2 days wiring this would be more productive...
I think learning how to make PCBs and not spending 2 days wiring this would be more productive...
I have probably committed some wiring sins here, but finished up the OWL Box.
50A across 12 channels, each to an OWL. 50A contactor, plus an EN channel to each OWL driver board to disable all outputs as a hardware-based control.
Can controller connected at the base.
50A across 12 channels, each to an OWL. 50A contactor, plus an EN channel to each OWL driver board to disable all outputs as a hardware-based control.
Can controller connected at the base.
June 10, 2025 at 10:00 PM
I have probably committed some wiring sins here, but finished up the OWL Box.
50A across 12 channels, each to an OWL. 50A contactor, plus an EN channel to each OWL driver board to disable all outputs as a hardware-based control.
Can controller connected at the base.
50A across 12 channels, each to an OWL. 50A contactor, plus an EN channel to each OWL driver board to disable all outputs as a hardware-based control.
Can controller connected at the base.
A moderately complete design for a screen-based cab controller for the OWL.
The Pi inside will connect over wifi to manage connected OWLs via MQTT. Using the 7 inch @raspberrypi.com touch screen 2.
#agsky
The Pi inside will connect over wifi to manage connected OWLs via MQTT. Using the 7 inch @raspberrypi.com touch screen 2.
#agsky
May 3, 2025 at 6:01 AM
A moderately complete design for a screen-based cab controller for the OWL.
The Pi inside will connect over wifi to manage connected OWLs via MQTT. Using the 7 inch @raspberrypi.com touch screen 2.
#agsky
The Pi inside will connect over wifi to manage connected OWLs via MQTT. Using the 7 inch @raspberrypi.com touch screen 2.
#agsky
April 25, 2025 at 1:28 PM
The new 16 channel OWL driver board for precision application over some drinks.
Now for the enclosure/designs!
paradar.co.uk/products/owl...
#agsky
Now for the enclosure/designs!
paradar.co.uk/products/owl...
#agsky
April 18, 2025 at 12:55 AM
The new 16 channel OWL driver board for precision application over some drinks.
Now for the enclosure/designs!
paradar.co.uk/products/owl...
#agsky
Now for the enclosure/designs!
paradar.co.uk/products/owl...
#agsky
First of seven 3D printed OWL enclosures for the 12m boom.
Five will be aluminium so we can compare durability/waterproofness.
PolyTerra PETG, 0.12mm layer height, Bambu Labs P1S.
3D model available here: github.com/geezacoleman...
#agsky
Five will be aluminium so we can compare durability/waterproofness.
PolyTerra PETG, 0.12mm layer height, Bambu Labs P1S.
3D model available here: github.com/geezacoleman...
#agsky
April 6, 2025 at 9:01 AM
First of seven 3D printed OWL enclosures for the 12m boom.
Five will be aluminium so we can compare durability/waterproofness.
PolyTerra PETG, 0.12mm layer height, Bambu Labs P1S.
3D model available here: github.com/geezacoleman...
#agsky
Five will be aluminium so we can compare durability/waterproofness.
PolyTerra PETG, 0.12mm layer height, Bambu Labs P1S.
3D model available here: github.com/geezacoleman...
#agsky
A fantastic few days at the Hello Tomorrow Global Summit in Paris.
The European deep tech scene is pretty impressive. Hopefully a few more agtech startups represented in the future!
The 2025 European Deep Tech report was also launched. You can download it here: dealroom.co/reports/the-...
#agsky
The European deep tech scene is pretty impressive. Hopefully a few more agtech startups represented in the future!
The 2025 European Deep Tech report was also launched. You can download it here: dealroom.co/reports/the-...
#agsky
March 15, 2025 at 7:51 PM
A fantastic few days at the Hello Tomorrow Global Summit in Paris.
The European deep tech scene is pretty impressive. Hopefully a few more agtech startups represented in the future!
The 2025 European Deep Tech report was also launched. You can download it here: dealroom.co/reports/the-...
#agsky
The European deep tech scene is pretty impressive. Hopefully a few more agtech startups represented in the future!
The 2025 European Deep Tech report was also launched. You can download it here: dealroom.co/reports/the-...
#agsky