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Steven Pigeon

@stevenpigeon.bsky.social

He/him. Ph. D in computer science, professor at UQAR. Data structures, data compression, algorithms, mathematics. Personnal account, opinions are my own.

49 Followers  |  76 Following  |  80 Posts  |  Joined: 12.12.2024  |  2.1928

Latest posts by stevenpigeon.bsky.social on Bluesky

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control panel of the day #HCI

25.11.2025 22:54 β€” πŸ‘ 10    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

I have been commissioned πŸ”₯ Henry-BarnabΓ© de la Veulerie and their friends are coming back.

I'll start tomorrow, and post the work in progress below.

25.11.2025 21:06 β€” πŸ‘ 47    πŸ” 12    πŸ’¬ 1    πŸ“Œ 0
Plusieurs formes de l'espace de couleur HSV (le pudding Γ  l'arsenic, le cΓ΄ne hexagonal, le cone) et la projection pour les construire (un cube RGB avec la grande diagonale noir-blanc Γ  la verticale, un point Γ  l'intΓ©rieur du cube projetΓ© sur son ombre hexagonale)

Plusieurs formes de l'espace de couleur HSV (le pudding Γ  l'arsenic, le cΓ΄ne hexagonal, le cone) et la projection pour les construire (un cube RGB avec la grande diagonale noir-blanc Γ  la verticale, un point Γ  l'intΓ©rieur du cube projetΓ© sur son ombre hexagonale)

25.11.2025 19:56 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
a large white snowy owl with yellow eyes and black speckles opens its wings to take off from the top of a large spruce tree on a clear evening.

a large white snowy owl with yellow eyes and black speckles opens its wings to take off from the top of a large spruce tree on a clear evening.

a large white snowy owl with yellow eyes and black speckles takes it first down stroke while taking off from the top of a large spruce tree on a clear evening.

a large white snowy owl with yellow eyes and black speckles takes it first down stroke while taking off from the top of a large spruce tree on a clear evening.

a large white snowy owl with yellow eyes and black speckles speads its wings in flight on a clear evening.

a large white snowy owl with yellow eyes and black speckles speads its wings in flight on a clear evening.

a large white snowy owl with yellow eyes and black speckles spreads its wings to the fullest in flight on a clear evening.

a large white snowy owl with yellow eyes and black speckles spreads its wings to the fullest in flight on a clear evening.

Took a detour on my way home from the city today to look for snowy owls and lucked into one just before sunset. They're such beautiful birds. #birds 🌿

25.11.2025 01:59 β€” πŸ‘ 553    πŸ” 65    πŸ’¬ 23    πŸ“Œ 4
  A large brown hawk is about to land on the very top of an evergreen tree. Its wings are up, tail spread out and feet out about to grab the top branch.

A large brown hawk is about to land on the very top of an evergreen tree. Its wings are up, tail spread out and feet out about to grab the top branch.

HOLY CRAP, what a glorious, powerful bird!!

(Red-tailed Hawk coming in for a landing) #birds 🌿

23.11.2025 21:45 β€” πŸ‘ 238    πŸ” 20    πŸ’¬ 9    πŸ“Œ 2
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SanhaΓ§u-cinzento/Sayaca Tanager
Thraupis sayaca
#animal #animais #animals #photo #birdwatching #photograph #photos #foto #birding #santamaria #santamariars #riograndedosul #bird #birds #Ave #aves #asavesqueeuencontro #patricianicoloso

23.11.2025 21:16 β€” πŸ‘ 39    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
a book page with a coat of arms showing a skull, next to it is written Caterine Morte

a book page with a coat of arms showing a skull, next to it is written Caterine Morte

they had goth baddies in the 17th century as evidenced by the fact that a woman named Caterine Morte had a skull coat of arms

23.11.2025 20:54 β€” πŸ‘ 1359    πŸ” 291    πŸ’¬ 20    πŸ“Œ 6
Tall heron standing alert in wet grass, showing flared, finely barred neck feathers, a streaked chest, and a long sharp bill with a bright yellow eye.

Tall heron standing alert in wet grass, showing flared, finely barred neck feathers, a streaked chest, and a long sharp bill with a bright yellow eye.

One of Barry's descendants surveying the area at @tapirvalley.bsky.social #CostaRica

Bare-throated Tiger-Heron

#birds #herons #nature

23.11.2025 17:42 β€” πŸ‘ 421    πŸ” 53    πŸ’¬ 15    πŸ“Œ 3
Edinburgh journal of natural history and of the physical sciences.
Edinburgh [etc.]: Published for the proprietor [etc.], 1835-1840.
https://biodiversitylibrary.org/page/33665607�

Edinburgh journal of natural history and of the physical sciences. Edinburgh [etc.]: Published for the proprietor [etc.], 1835-1840. https://biodiversitylibrary.org/page/33665607

Edinburgh journal of natural history and of the physical sciences. Edinburgh [etc.]: Published for the proprietor [etc.], 1835-1840. (source: https://biodiversitylibrary.org/page/33665607) #nature #illustration #art

21.11.2025 15:05 β€” πŸ‘ 19    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0
Papillons;
Paris, Tolmer[ca. 1925]
http://biodiversitylibrary.org/page/48852985�

Papillons; Paris, Tolmer[ca. 1925] http://biodiversitylibrary.org/page/48852985

Papillons; Paris, Tolmer[ca. 1925] (source: http://biodiversitylibrary.org/page/48852985) #nature #illustration #art

20.11.2025 12:08 β€” πŸ‘ 24    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0
Historical illustration of a "Golden Crowned Parroquet," a vibrant green parrot with a striking golden-yellow patch on its forehead, red eyes, and a hooked dark beak. The bird has blue and dark green feathers on its wings and long tail feathers with subtle yellow highlights. It is perched on a textured, curved tree branch above a small patch of green grass and foliage. The naturalistic style captures fine feather details and the bird’s firm grip on the branch. The vintage artwork, part of "The Naturalist’s Pocket Magazine," showcases nature’s curiosities through detailed, colorful depiction.

Historical illustration of a "Golden Crowned Parroquet," a vibrant green parrot with a striking golden-yellow patch on its forehead, red eyes, and a hooked dark beak. The bird has blue and dark green feathers on its wings and long tail feathers with subtle yellow highlights. It is perched on a textured, curved tree branch above a small patch of green grass and foliage. The naturalistic style captures fine feather details and the bird’s firm grip on the branch. The vintage artwork, part of "The Naturalist’s Pocket Magazine," showcases nature’s curiosities through detailed, colorful depiction.

πŸ”Ž The Naturalist's Pocket Magazine or compleat cabinet of the curiosities and beauties of nature.
London.

[Source]

23.11.2025 07:23 β€” πŸ‘ 21    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0
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Mantis from 'An Epitome of the Natural History of the Insects of India, and the Islands in the Indian Seas' by Edward Donovan. London: Printed for the author by T. Bensley, 1800.

I saw this at Harvard’s Houghton Library.

#naturalhistory #insectart #HoughtonLibrary #insects #rarebooks #sciart

23.11.2025 15:51 β€” πŸ‘ 35    πŸ” 10    πŸ’¬ 3    πŸ“Œ 0
A delicate ivory gazelle, #Egypt, New Kingdom, ca. 1390–1352 BC, standing on a wooden pedestal with inlaid decoration depicting plants that allude to its semi-desert habitat.

Size: H. 11.6 Γ— W. 9.7 Γ— D. 5 cm

A delicate ivory gazelle, #Egypt, New Kingdom, ca. 1390–1352 BC, standing on a wooden pedestal with inlaid decoration depicting plants that allude to its semi-desert habitat. Size: H. 11.6 Γ— W. 9.7 Γ— D. 5 cm

β™₯️ Absolutely love this delicate & alert ivory gazelle, #Egypt, New Kingdom, ca. 1390–1352 BC, standing on a wooden pedestal with inlaid decoration depicting plants that allude to its semi-desert habitat.

Size: H. 11.6 Γ— W. 9.7 Γ— D. 5 cm
πŸ›οΈ Met

🏺 #archaeology πŸ—ƒοΈ #arthistory #art

23.11.2025 15:41 β€” πŸ‘ 141    πŸ” 35    πŸ’¬ 0    πŸ“Œ 1
Fluffy white moth with bright red spots and tufts resting on a dark reflective surface.

Fluffy white moth with bright red spots and tufts resting on a dark reflective surface.

I found this amazing Trosia semirufa moth on my window last night at @casabentbill.bsky.social

#moths #lepidoptera #nature #costarica

23.11.2025 01:46 β€” πŸ‘ 189    πŸ” 21    πŸ’¬ 7    πŸ“Œ 1
Close-up of a dark-feathered bird with a pale beak and bright blue eye ring against a soft green background.

Close-up of a dark-feathered bird with a pale beak and bright blue eye ring against a soft green background.

Here's a little more detail of the eye ring on the male Black-headed Trogon at Agami Island. The blue is skin; not feathers.

One day, I hope to get a closer view of this species.

#birds #nature #costarica

23.11.2025 01:56 β€” πŸ‘ 325    πŸ” 33    πŸ’¬ 12    πŸ“Œ 1
Brown and black speckled bird with a blue face and pale bill perched on a slanted branch against a soft, blurred background.

Brown and black speckled bird with a blue face and pale bill perched on a slanted branch against a soft, blurred background.

I watched a large group of young Ocellated Antbirds hunting in an antswarm with their parents yesterday. I've never been this close to this species, as I could have literally reached out and touched this bird.

This is an obligate antbirds, meaning...

#birds #costarica

23.11.2025 02:16 β€” πŸ‘ 356    πŸ” 48    πŸ’¬ 7    πŸ“Œ 0
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Spent some time testing new 8-bit Atari equip. Have an 800XL I picked up recently with a stuck key. Fixed by cleaning mylar. Also got an Indus GT working that I picked up at VCFMW for $50. Cleaned the head & greased the rails. All working great! #atari #atari8bit #retrocomputing #indusGT

23.11.2025 00:34 β€” πŸ‘ 40    πŸ” 4    πŸ’¬ 2    πŸ“Œ 1
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SabiΓ‘-do-banhado/Great Pampa-Finch
Embernagra platensis
#animal #animais #animals #fotografias #photography #foto #photograph #photo #photos #birding #birdwatching #torres #torresrs #riograndedosul #bird #birds #Ave #aves #asavesqueeuencontro #patricianicoloso

22.11.2025 21:56 β€” πŸ‘ 41    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
LEGO Ideas page screenshot showing a yellow LEGO recreation of a cuneiform tablet on a clear stand. Described as "Complaint Tablet to Ea-Nasir". Box states: "Milestone missed" and below: "315 supporters."

LEGO Ideas page screenshot showing a yellow LEGO recreation of a cuneiform tablet on a clear stand. Described as "Complaint Tablet to Ea-Nasir". Box states: "Milestone missed" and below: "315 supporters."

Still can't believe y'all missed out on such a visionary #Lego Idea (not mine though)! πŸ˜²πŸ˜‰

22.11.2025 22:25 β€” πŸ‘ 55    πŸ” 11    πŸ’¬ 2    πŸ“Œ 1
Black-and-yellow bird with a blue eye ring perched on a strand of barbed wire against a soft green background.

Black-and-yellow bird with a blue eye ring perched on a strand of barbed wire against a soft green background.

I'm not sure if I'm legally allowed to post two #birdoftheday posts for #birdonawire

But here's a closer view of the male Black-headed Trogon, showing his darker head and iridescent back.

#CostaRica #birds #trogon #nature

22.11.2025 20:45 β€” πŸ‘ 426    πŸ” 57    πŸ’¬ 13    πŸ“Œ 1
Woodcarved scene on a round base. An humanoid octopus wearing a dress is holding a basket with a duck inside of it. On the head of the octopus, a grumpy frog taking shelter of a big ancient book. Next to them all, a sword is coming out of water among bulrush. On the top of it sits a kingfisher.

Woodcarved scene on a round base. An humanoid octopus wearing a dress is holding a basket with a duck inside of it. On the head of the octopus, a grumpy frog taking shelter of a big ancient book. Next to them all, a sword is coming out of water among bulrush. On the top of it sits a kingfisher.

Glass bell with a woodcarved scene of a humanoid octopus wearing a dress on the surface of a pond. The creature has a kingfisher on its head. It's holding a book wich has a duck sitting on it. On the left of the base looking like water, bulrushes. On the right, a little frog has its head out of water. In the background, indoor plants by a window.

Glass bell with a woodcarved scene of a humanoid octopus wearing a dress on the surface of a pond. The creature has a kingfisher on its head. It's holding a book wich has a duck sitting on it. On the left of the base looking like water, bulrushes. On the right, a little frog has its head out of water. In the background, indoor plants by a window.

I want to make a third Ancient Wisdom. Someone commission me please.

21.11.2025 20:36 β€” πŸ‘ 242    πŸ” 75    πŸ’¬ 6    πŸ“Œ 1
Photo of a male anna's hummingbird sitting on a small branch of a blackberry shrub. he is in profile facing right, a patch of feathers behind his eye, and the bottom of his gorget are refracting fuchsia.

Photo of a male anna's hummingbird sitting on a small branch of a blackberry shrub. he is in profile facing right, a patch of feathers behind his eye, and the bottom of his gorget are refracting fuchsia.

I've got three Anna's in the yard right now - but Mr. is fixin' to fully take over! (the others will sneak by him all winter!)

#birds #becurious πŸͺΆ

22.11.2025 02:05 β€” πŸ‘ 195    πŸ” 29    πŸ’¬ 7    πŸ“Œ 3
A yellow-bellied sapsucker pecking at a berry while hanging upside down from a branch

A yellow-bellied sapsucker pecking at a berry while hanging upside down from a branch

The yellow-bellied sapsucker perched on a branch, with some berries around him. It has chunks of berries smeared all over its beak. You can actually see the yellow belly that gives it its name!

The yellow-bellied sapsucker perched on a branch, with some berries around him. It has chunks of berries smeared all over its beak. You can actually see the yellow belly that gives it its name!

Seen today on my commute through Central Park: a yellow-bellied sapsucker (chupasavia norreΓ±o) having a berry breakfast... I didn't know they like berries too! #birds πŸͺΆ

20.11.2025 21:46 β€” πŸ‘ 39    πŸ” 6    πŸ’¬ 1    πŸ“Œ 0
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Curicaca/Buff-necked Ibis
Theristicus caudatus
#animal #animais #animals #fotografias #photography #foto #photograph #photo #photos #birding #birdwatching #torres #torresrs #riograndedosul #bird #birds #Ave #aves #asavesqueeuencontro #patricianicoloso

20.11.2025 22:15 β€” πŸ‘ 92    πŸ” 5    πŸ’¬ 0    πŸ“Œ 1
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splendid

20.11.2025 22:46 β€” πŸ‘ 27    πŸ” 3    πŸ’¬ 1    πŸ“Œ 1

Will do

20.11.2025 22:47 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Avec le collectif on a visitΓ© un petit local aujourd'hui. On va voir ce qu'on peut faire ou pas dedans. En tout cas, on manque pas d'idΓ©es. Γ‡a fait du bien d'Γͺtre dans l'action, de crΓ©er du commun, de voir les autres mettre de l'Γ©nergie dans du collectif.

20.11.2025 22:02 β€” πŸ‘ 65    πŸ” 8    πŸ’¬ 2    πŸ“Œ 0
Preview
Microsoft makes Zork I, II, and III open source under MIT License Microsoft’s Open Source Programs Office worked with Jason Scott to do it.
20.11.2025 20:39 β€” πŸ‘ 126    πŸ” 30    πŸ’¬ 4    πŸ“Œ 3
A stag is dashing through a snowy forest, followed by three ghostly rabbits. Flames are framing its head. Everyone has glowing white eyes because at this point I am not even sure what proper eyes look like anymore.

A stag is dashing through a snowy forest, followed by three ghostly rabbits. Flames are framing its head. Everyone has glowing white eyes because at this point I am not even sure what proper eyes look like anymore.

Ragequit #art #originalart #painting

06.11.2025 15:02 β€” πŸ‘ 300    πŸ” 98    πŸ’¬ 0    πŸ“Œ 0
Un adorable Kwoka sculptΓ© en bois avec une faux et demandant votre Γ’me avec politesse

Un adorable Kwoka sculptΓ© en bois avec une faux et demandant votre Γ’me avec politesse

20.11.2025 18:42 β€” πŸ‘ 29    πŸ” 6    πŸ’¬ 0    πŸ“Œ 0

@stevenpigeon is following 17 prominent accounts