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robertleoj

HN member
Joined
Sun, Feb 18, 2024, 2:40 PM UTC
HN karma
126
Public activity
31 items

About robertleoj

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Recent public activity

  1. story
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  3. comment
    Comment #47238396

    Hello Dima! Thanks for replying - I really admire your work with mrcal, and have used it for a while in my work. And lensboy is heavily inspired by mrcal. > Is your splined represe…

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    Show HN: Lensboy – Lightweight camera calibration with spline distortion models

    I do a lot camera calibration. As my need for accuracy increased, I started using mrcal, a great camera calibration tool. But I found it didn't fit my workflow well in terms of wor…

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    Comment #45286818

    Hello! I'm the creator of SlamDunk, and I use it daily in my day-to-day work for 3D visualizations. I really like it, so I thought I'd share it.

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    Show HN: SlamDunk: A user-friendly 3D visualization library

    Hello! I am working on SlamDunk, a lightweight and easy-to-use visualization library built with C++. I started the project out of a personal need - I am in the process of learning …

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    Comment #42462394

    Did you try using the previous configuration as an initial guess to the numerical optimizer? If the next position is close to the previous one, the solver should be very quick. Als…

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    Comment #42416081

    Thanks! Exactly - I feel much more comfortable talking about the hardware at work now after having made this and feel more confident about making something more advanced. This is m…

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    Comment #42416068

    Right? I'm thoroughly enjoying that rush :D

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    Comment #42416066

    Really cool 4dof robot - thanks for the reccomendation

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    Comment #42416058

    Thank you, great to hear!

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    Comment #42416053

    That's true - using numerical optimization was just the simplest/fastest way to get it working :P

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    Comment #42416042

    Nice - did you just chuck it into wolfram alpha or sympy? How'd you get it?

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    Comment #42416038

    Thank you! I made it like that purely for fun, this project was not intended to be useful, or have the best mechanical design :P Using Gcode is a good idea, though it does seem a b…

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    Comment #42416031

    Oh wow that is refined indeed - I'll check it out, thanks!

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    Comment #42416019

    That's very inspiring for me to hear, thank you! Glad it's useful.

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    Comment #42416015

    "Mastered" is a strong word, but thanks!

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    Comment #42416012

    Hahaha wow that is scrappy as hell - it does look difficult to get right :P

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    Comment #42416008

    Well in what context does it matter? If it's useful for you to learn, then it matters, right? There are also endless applications for hardware, but I guess to make a viable product…

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    Comment #42415986

    Yeah - I'm using mediapipe for hand tracking, which is straight out of the box. Then I can just make the robot draw the exact sequence of dots my index finger drew :)

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    Comment #42415974

    Great to hear that it's useful!

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    Comment #42415970

    Happy to hear :D

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    Comment #42415965

    Previously, I worked at a startup where we were making a vision system for golf simulators to analyze the player's swing. It's this company: https://www.elvagolf.com/ I learned a l…