Fig. 9. §1 Studio
QR Damage Lab
QR codes still scan when part of them is lost, because error correction can rebuild missing codewords: about 7, 15, 25 or 30 percent at levels L, M, Q and H.
1Facts
- Shelf
- Studio
- Kind
- Built from a recipe
- Your own
- The Damage lab
- Sound
- Yes
- Licenses
- Apache-2.0, MIT
2How to play
Pick a damage in the Splash tab, then tap or draw on the code. Watch the meter.
3Its controls
Table I. Every control on this Splash.
| Control | Kind | Range | Start |
|---|---|---|---|
| Add damage | Tap | ||
| Tilt | Slider | 0 to 100% | 0% |
| Curve | Slider | 0 to 100% | 0% |
| Move in time | Slider | 0 to 100% | 0% |
| Damage lands | Button | ||
| Heal | Switch | Off | |
| Shape | List | 2 choices | Square |
4About it
QR codes still scan when part of them is lost, because error correction can rebuild missing codewords: about 7, 15, 25 or 30 percent at levels L, M, Q and H.
Here you scratch a code or stick a label on it where you tap, draw on it with a marker, tear it from the corner or the edge nearest your tap, burn it from the nearest corner, smudge it, or do what only a code of splats allows: blur, shrink, grow, jitter or fade its splats, drift its color, curve it, tilt it or set it moving. After each change the meter reads the very picture on the stage and counts each block's lost codewords against what it can fix. Show all four levels side by side, or tap Heal it to watch Reed–Solomon decoding set each block right.
5Sources and credits
Made in Splashery. Its code is MIT.
6Libraries
- Apache-2.0
- jsQR 1.4.0 (lane LSTUDIO)
- MIT
- QR Code generator library (Project Nayuki)
- MIT, Apache-2.0
- zxing-wasm 3.1.4, with zxing-cpp (copied from Splashery)
