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The Ruby and Rails community linklog

Made a library? Written a blog post? Found a useful tutorial? Share it with the Ruby community here or just enjoy what everyone else has found!

Ruby Sees the World.

by Giménez Silva Germán Alberto —

https://rubystacknews.com/2026/03/23/ruby-sees-the-world-automatic-measurement-from-photos/

Place a credit card in a photo. Ruby finds it, calibrates the scale, and measures everything else in the frame.

Door: 2.1m. Window: 1.2m. Wall: 8.0m.

Hough transform + Sobel (native C) + ruby-libgd.

Ruby #ComputerVision #RubyDev #Photogrammetry

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