Thread

MUNI Heritage Weekend in San Francisco

204 points · 56 comments · plun9

dllu · 1790017594 · focus · HN ↗
OP here, ask me anything! I've also written about the process previously:
- Line scan camera image processing: <a href="https://daniel.lawrence.lu/blog/2025-09-21-line-scan-camera-image-processing/" rel="nofollow">https://daniel.lawrence.lu/blog/2025-09-21-line-scan-camera-... Previous discussions:
```
  - https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=44996938

  - https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=46383593

  - https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=46388084
```
- Standalone line scan camera hardware: <a href="https://daniel.lawrence.lu/blog/2026-06-12-standalone-cnc-line-scan-camera/" rel="nofollow">https://daniel.lawrence.lu/blog/2026-06-12-standalone-cnc-li...
- Line scan camera image processing 2: <a href="https://daniel.lawrence.lu/blog/2026-08-02-line-scan-camera-image-processing-part-2/" rel="nofollow">https://daniel.lawrence.lu/blog/2026-08-02-line-scan-camera-...
1. Theodores · 1790092577 · focus · HN ↗
  I have a long-standing dream to use a line scan camera from a moving train, assuming everything would be easy, if I had the camera. Little did I realise how much work is needed to tidy up the imagery!
  Your work is extremely beautiful, and I am truly envious of your work, the aesthetic is awesome. I want to do it on the cheap though, with a regular phone as camera.
  I think you have given me the directions needed to make some bold steps towards getting what I want out of the 'medium'.
  1. dllu · 1790099640 · focus · HN ↗
    If you want to use a regular phone or camera, check out TrainScanner!
    <a href="https://github.com/vitroid/TrainScanner" rel="nofollow">https://github.com/vitroid/TrainScanner
    It converts a regular video into a line scan style photo. It works by stitching together small chunks rather than 1px thin slices, so the background has a repetitive texture rather than being smooth horizontal stripes. But at lower resolutions, it looks similar, especially if you pick a spot with a clean background. Also the trains turn out very detailed.
    Example work by Kakeyama from Japan using this: <a href="https://kakeyama.fan.coocan.jp/tec/e5e8r.htm" rel="nofollow">https://kakeyama.fan.coocan.jp/tec/e5e8r.htm
    Theodores · 1790265450 · focus · HN ↗
    Many thanks! Those trains are beauties. Looks like I had best get out there, giving it a go. It is canalside that I want.

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