iiinova — where your digital self keeps evolving

Reposted by Stijn Oomes

Philip Ball @philipcball.bsky.social · 30/09/2026

Was the Parthenon exquisitely designed to "correct" for visual distortions in its perfect geometry? This idea seems to be widely believed. But it seems it doesn't stand up to scrutiny. royalsocietypublishing.org/rsos/article...

royalsocietypublishing.org

The illusion of illusions: there are no optical corrections in the Parthenon

Abstract. One of the oldest and most enduring myths in human history is the belief that the Parthenon was cleverly designed with various curved structures

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Qiusheng Wu @giswqs.bsky.social · 28/09/2026

GeoLibre in 30 Seconds: Free, Open-Source GIS That Runs Everywhere Try it out - Launch GeoLibre Web: web.geolibre.app - GitHub: github.com/opengeos/Geo... - Documentation: geolibre.app

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Stijn Oomes @stijnoomes.bsky.social · 24/10/2025

Natural Perspective is an approach that basically ignores the optical projection. Euclid called it 'visual cone’ (300 BC). Gibson later called it 'visual solid angle’ (1986). I apply Rational Trigonometry (Wildberger 2005) and get pleasantly simple expressions. youtu.be/9qCtaVkFZsI

youtu.be

Geometric Vision | Lesson 8 | Natural Perspective

YouTube video by Stijn Oomes

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Stijn Oomes @stijnoomes.bsky.social · 25/09/2026

We have some problems at home and our prime minister is fumbling quite a bit, but nevertheless i can say that he, PM Rob Jetten, made me proud with his address to the UN share.google/Lvku20iWNcNe...

share.google

Netherlands - Prime Minister Addresses United Nations General ...

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Stijn Oomes @stijnoomes.bsky.social · 05/08/2026

If you are in NYC, please help! Below is a frame from a video recorded inside The Oculus, the main hall of the World Trade Center Transportation Hub. For a 3D vision project we would like to know the length and width of the marble tiles. We prefer the metric system. Thanks!

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Stijn Oomes @stijnoomes.bsky.social · 05/08/2026

Look what I found at Metropolia in Helsinki.

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Stijn Oomes @stijnoomes.bsky.social · 11/07/2026

I do not like the summer heat but I do like to walk while talking about science and mathematics in 17th century Amsterdam. So I scheduled an Amsterdam Geo-Walk in the early morning of Wednesday 22 July. That is in 10 days when it is predicted to be a little cooler. www.skool.com/amsterdam-ge...

skool.com

Amsterdam Geo-Walk

A guided tour through 17th century Amsterdam. Where cartography meets geometry. Where the Dutch Golden Age meets the Scientific Revolution.

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Stijn Oomes @stijnoomes.bsky.social · 10/07/2026

I visited Amsterdam for the first time (without parents) in the early 1980s. Ed van der Elsken captured 1982 Amsterdam in his documentary “Een fotograaf filmt Amsterdam”. The city was clearly less international than it is now, but paradoxically also more diverse. Link below.

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Dr Anna Clark @drannaclark.bsky.social · 09/07/2026

The Arnolfini Portrait, masterpiece of Northern Renaissance, oil on oak panel, 1434 by Jan van Eyck, died in Bruges #OTD 1441; tender memorial probably of wife who died in childbirth; richly detailed interior of brass candelabra, snuffed candle, faithful dog, mirror reflecting artist. ALT NG London

The couple’s costly fur-trimmed and lined clothes (his purple silk velvet tabard trimmed with sable and her spring green houppelande lined with miniver) suggest the male subject is Giovanni di Nicolao Arnolfini, silk merchant from Lucca, who lived in Bruges & supplied fine textiles to Philip the Good of Burgundy, ruler of Europe's richest court, and patron of Van Eyck.

The young woman has been identified as Giovanni’s wife Costanza, thought to have died in childbirth.

The intimacy & tenderness of the couple, with their joined hands, is reflected in the convex mirror, which also bears witness to the shadowy presence of the artist, whose signature & date are just above: ‘Johannes de Eyck fuit hic 1434’ (Jan van Eyck was here 1434).

The painting passed into the Habsburg Collections (Margaret of Austria, Philip II of Spain) before The National Gallery.

Note: forthcoming Exhibition of Van Eyck at National Gallery London - from November 2026.

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Stijn Oomes @stijnoomes.bsky.social · 29/06/2026

Truly an amazing accomplishment.

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Qiusheng Wu @giswqs.bsky.social · 20/06/2026

GeoLibre v1.5.0 is here! Try it out - Live demo: viewer.geolibre.app - GitHub: github.com/opengeos/Geo... - Documentation: geolibre.app - Release notes: github.com/opengeos/Geo... #GIS #GeospatialData #OpenSource #RemoteSensing #DataVisualization #MapLibre #Python

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Stijn Oomes @stijnoomes.bsky.social · 13/06/2026

I have heard people say that getting a PhD means overly specializing in an extremely tiny piece of knowledge. I think that it is essentially an exercise in realizing how f#€k!ng difficult it is to actually really understand something.

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Stijn Oomes @stijnoomes.bsky.social · 04/06/2026

Adam J French captured the Zeitgeist perfectly.

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Cabel Sasser @cabel.panic.com · 11/05/2026

this graduation speech moment is notable, and her amazed shock at having failed to read the room feels instructive. when you're inside the bubble, you think everybody else is. but everybody isn't.

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Stijn Oomes @stijnoomes.bsky.social · 09/05/2026

“It's a new dawn, it's a new day. It's a new life for me. And I'm feeling good.” Feeling Good, Nina Simone (1965) youtu.be/Yc5jwR9KUvg?...

youtu.be

Nina Simone - Feeling Good (Lyric Video)

YouTube video by NinaSimoneVEVO

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Karin Spaink @karinspaink.bsky.social · 08/05/2026

Vandaag ben ik uit vrije wil gestorven, in het gezelschap van mijn beste vrienden. Het hoe & wat daarvan staat in mijn allerlaatste stukje: www.spaink.net/2026/05/08/e....

spaink.net

Karin Spaink - Exit Spaink – mijn allerlaatste stukje

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Kirsten Verdel @locuta.bsky.social · 08/05/2026

Karin Spaink is niet meer :( www.spaink.net/2026/05/08/e...

spaink.net

Karin Spaink - Exit Spaink – mijn allerlaatste stukje

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Ron Chan @rondanchan.bsky.social · 06/05/2026

Using the rules of linear perspective to combat ai slop can I get a hell yeah

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Thony Christie @rmathematicus.bsky.social · 26/03/2026

The evolution of Newton's mechanics from De motu (1684) to Principia (1687) #histsci thonyc.wordpress.com/2026/03/26/f...

Portrait of Isaac Newton by Godfrey Kneller 1689

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Stijn Oomes @stijnoomes.bsky.social · 18/02/2026

They seem to enjoy sitting in their little chairs.

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Arnoud Visser @physar.bsky.social · 16/12/2025

In the final assignment of this year's Vision for Autonomous Robots course the students have to create a Visual 3D map and do the navigation on that map. Luckily there is an Aibo robot dog overlooking their progress from its watchtower.

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Chiara Phillips @chiaraphillips.bsky.social · 19/11/2025

Happy GIS Day! 🌍❣️ Felt fitting that the theme of the #30DayMapChallenge was projections today! I want to dive into the math behind these sometime, it’s fascinating!!

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Stijn Oomes @stijnoomes.bsky.social · 08/11/2025

For reasons I do not recall the Geo-Walks have always been on weekdays. So, the next Amsterdam Geo-Walk is on Saturday 15 November, starting at 10:00. The main characters are father & son Blaeu, and Mayor Hudde, with cameos of Descartes and Huygens. You can sign up at www.skool.com/amsterdam-ge...

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Stijn Oomes @stijnoomes.bsky.social · 29/10/2025

It is election night here in the Netherlands. We voted today for the members of parliament in the Second Chamber. It is quite unpredictable this time. I always enjoy looking at the people behind the reporter at the gatherings of the political parties. As an amateur anthropologist.

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Stijn Oomes @stijnoomes.bsky.social · 29/10/2025

Deze info heb ik nu even nodig. Dank Steeph!

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Stijn Oomes @stijnoomes.bsky.social · 28/10/2025

As a citizen of Amsterdam, I was invited to celebrate its 750th anniversary in City Hall on Dam Square. I was mainly interested in the 6.24-meter-diameter floor maps by Joan Blaeu in the Burgerzaal. I made a cameo appearance during an interview for local news channel AT5. I am the man in blaeu.

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Stijn Oomes @stijnoomes.bsky.social · 26/10/2025

The Royal Palace Amsterdam is probably the only building in the city that is exactly aligned with the cardinal directions. Strangely satisfying.

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Stijn Oomes @stijnoomes.bsky.social · 24/10/2025

youtu.be

Geometric Vision | Lesson 8 | Natural Perspective

YouTube video by Stijn Oomes

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Stijn Oomes @stijnoomes.bsky.social · 21/10/2025

In the 7th and final session today I gave a summary of the theory of vision I am developing. I realised I have shared many partial results but have never given a overview of all the steps in the vision process. If you want to join me on this adventure, sign up at www.skool.com/geometric-vi...

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Peter Adamson @histphilosophy.bsky.social · 11/05/2025

Why is Descartes' name synonymous with mind-body dualism, why was he so convinced by this theory, and how did he explain vital activities in the body if there is no "soul"? Find out the answers on today's new podcast: www.historyofphilosophy.net/descartes-du... #hopwag #philsky #descartes #mind

Diagram explaining vision from an early printed work by Descartes

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Stijn Oomes @stijnoomes.bsky.social · 13/10/2025

@rmathematicus.bsky.social thank you for being a source of inspiration for this!

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Stijn Oomes @stijnoomes.bsky.social · 13/10/2025

I am getting ready for the first Amsterdam Geo-Walk of the season. It is a guided tour around 17th century Amsterdam with geography and geometry as its main themes. This week I have 16 participants which is more than I am used to.

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Stijn Oomes @stijnoomes.bsky.social · 11/10/2025

The fundamental problem of human visual perception; eyes & brains measure visual directions and visual angles, but we need to know object dimensions & shape, positions, and attitudes.

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Stijn Oomes @stijnoomes.bsky.social · 08/10/2025

In the 5th session today I discussed some of the computer vision systems that I have developed. One nice result is that I determined the height of the National Monument on Dam square in Amsterdam from a photograph taken by a drone. You can still join for free at www.skool.com/geometric-vi...

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Stijn Oomes @stijnoomes.bsky.social · 01/10/2025

Today was the 4th of 7 sessions and I have addressed the core topic of my research: visual objects. If you want to follow along, you can still join for free at lnkd.in/e4UsJjFr

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Flip Phillips @flipphillips.com · 19/09/2025

We love the retina. A tractable brain. Learn how it works and you understand infinitely more about the rest of the nervous system. This structural image - <chefs kiss>

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Thony Christie @rmathematicus.bsky.social · 17/09/2025

René Descartes mechanics and cosmology #histsci thonyc.wordpress.com/2025/09/17/f...

Left: engraved portrait of René Descartes
Right: title page of Principia Philosophiæ

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Stijn Oomes @stijnoomes.bsky.social · 17/09/2025

Below you can see me gesturing that my new method for finding the focal length of a camera is really close to the classic result. I have derived a simple formula for the focal length of a camera from the elliptical projections of spheres only.

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Stijn Oomes @stijnoomes.bsky.social · 10/09/2025

The 2nd video for my Skool channel is on geometry. I applied Rational Trigonometry created by Wildberger to derive simple expressions for what Euclid called 'visual cones' and Gibson called 'visual solid angles'. You can see that I am looking up to them.

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Stijn Oomes @stijnoomes.bsky.social · 04/09/2025

Everything went smoothly while re-recording the 1st video for my Skool channel. Except for claiming that vision is fundamentally simple, I also talked about cognitive models and argued that future AI needs explicit visual world models.

A person's head in silhouette looking at a car model and thinking about it visualised by a thought bubble.

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Stijn Oomes @stijnoomes.bsky.social · 03/09/2025

I have been recording the first video for my Skool channel today. It turned out that the 🎤was not properly connected. So, I practiced recording my first video today.

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Stijn Oomes @stijnoomes.bsky.social · 28/08/2025

I opened my own school. Below is an invite to a free private online community on the theme of geometric vision. For those who can join, I will give a first course on my research results every Wednesday over the next 7 weeks. Check it out via www.skool.com/geometric-vi...

skool.com

Geometric Vision

A geometric approach to visual perception and computer vision.

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Stijn Oomes @stijnoomes.bsky.social · 31/07/2025

Unless Wikipedia's translation is wrong it is literally in the 1st postulate of Euclid’s Optics: Let it be assumed 1. That rectilinear rays _proceeding from the eye_ diverge indefinitely.

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Stijn Oomes @stijnoomes.bsky.social · 21/06/2025

The fundamental problem of vision; we measure directions and angles, but we want to know distances and dimensions.

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