iiinova — where your digital self keeps evolving

Thomas Lefebvre @tlbvr.com · 30/05/2026

Implemented something to track pieces and give them stable ids. This will allow me to understand more precise movement across the board, e.g knowing if a piece got lifted and put back on the same square.

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Thomas Lefebvre @tlbvr.com · 16/05/2026

Transposing the board into a 2D grid for visualization. I'm going to need some smoothing/tracking because at soon as the model loses after some jitter, it forgets something was there before.

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Thomas Lefebvre @tlbvr.com · 25/04/2026

It's now able to map detections back to squares in the board grid space and flag them as "occupied".

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Thomas Lefebvre @tlbvr.com · 11/04/2026

Model needs work with classification but the video pipeline is now much smoother at 30fps.

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Thomas Lefebvre @tlbvr.com · 06/03/2026

Making progress..slowly but surely. The model needs more training but here's a friday evening end to end pipeline.

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Thomas Lefebvre @tlbvr.com · 01/03/2026

I may have an acute overfitting case here...

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Thomas Lefebvre @tlbvr.com · 28/02/2026

Decided to fine-tune YOLO. I'm annotating data...how's your saturday?

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Thomas Lefebvre @tlbvr.com · 14/02/2026

I'm trying Molmo and this is impressive

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Thomas Lefebvre @tlbvr.com · 13/02/2026

Overwriting the overridable overridden instructions.

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Thomas Lefebvre @tlbvr.com · 26/01/2026

We just named one of our service after this magical object. For all the Zelda fans out there.

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Thomas Lefebvre @tlbvr.com · 19/01/2026

Finally got it working on live camera. It's still supper laggy when I draw onto the frame but the most important part is the homography works in various angles. Still need to test how it behaves in various brightness settings.

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Thomas Lefebvre @tlbvr.com · 18/01/2026

I applied the same heuristics to another board where I printed the actual aruco markers. Works well! Defining the playable squares by hand is a bit tedious, but I'm sure we can streamline this.

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Thomas Lefebvre @tlbvr.com · 02/01/2026

I'm finally writing the second part. Never too late.

Screenshot with a sneak peek of the second part of the blog series.

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Thomas Lefebvre @tlbvr.com · 30/12/2025

Woaw. I'm finding my TS roots again (this is python)

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Thomas Lefebvre @tlbvr.com · 29/12/2025

On to detecting pieces — I'm not sure yet how I'm going to avoid false positive because of light/shadows.

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Thomas Lefebvre @tlbvr.com · 24/12/2025

Building a way to map game boards and make it resilient to jitter/skewing. Goal is to feed video frames to this algorithm and keep the mapping stable.

Skewed board 1 retaining original mapping

Skewed board 2 retaining original mapping

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Thomas Lefebvre @tlbvr.com · 29/07/2025

I'm setting up K-fold cross validation producing K models, each trained on a subset of the training set and predicting on a validation set. Appending those predictions together, we ensure that the whole dataset has been seen but equally split amongst the models.

screenshot showing the train process of various models

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Thomas Lefebvre @tlbvr.com · 25/07/2025

Friday night. Will this job pass before I pass out?

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Thomas Lefebvre @tlbvr.com · 24/07/2025

I spawned two machines. Someone stops me.

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Thomas Lefebvre @tlbvr.com · 23/07/2025

I live in the MLFlow dashboard these days. Let's see if `likeable-horse-161` performs better.

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Thomas Lefebvre @tlbvr.com · 09/07/2025

I'm preparing a presentation for my team @unsplash.com to walk them through our recent progress in categorizing illustrations If you missed it, I wrote a blog post about it bsky.app/profile/tlbv...

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Thomas Lefebvre @tlbvr.com · 23/06/2025

Making good progress. Here's a peek — Probably gonna take me another week or so.

Screenshot of the blog post I'm writing.

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Thomas Lefebvre @tlbvr.com · 05/06/2025

When your day is going well, very much know what needs to be done.

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Thomas Lefebvre @tlbvr.com · 30/04/2025

I dont know how folks can even read news on their phone nowadays

Screenshot of my phone with ads everywhere

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Thomas Lefebvre @tlbvr.com · 22/02/2025

Saturday morning maintenance?

Screenshot of dependencies that need an upgrade

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Thomas Lefebvre @tlbvr.com · 30/01/2025

Nice! I’m in the middle of this one. Will queue it up.

Book cover of “designing machine learning systems”

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Thomas Lefebvre @tlbvr.com · 29/12/2024

Looks like I found a winner. nomic-embed-text yields a higher F score even when prioritizing precision over recall. Gonna clean up the notebook and write up a short post about this experiment. Learned a lot!

Screenshot of plot results for my experiment

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Thomas Lefebvre @tlbvr.com · 28/12/2024

Post side project wind down.

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Thomas Lefebvre @tlbvr.com · 27/12/2024

Then asked GPT to come up with the test cases given a sample of my data. The algorithm then picks an embedding model given the best F1 score across all test queries and models and recommends which one I should use and at which cosine similarity threshold.

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Thomas Lefebvre @tlbvr.com · 27/12/2024

Got myself a little framework to compare embedding models for retrieving similar restaurants given a search query. I'll make the github repo public soon.

Plotting F1 score across various embedding models

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Thomas Lefebvre @tlbvr.com · 26/12/2024

I'm running tests against different embedding models and cosine similarity thresholds to find the most balanced combo for finding similar restaurants given their description and a search query.