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QR code

Assess

Techniques

A two-dimensional barcode format used to encode machine-readable data.

Why it's here

Placed in Assess: 3 article(s) of evidence from 1 source(s), led by research-stage coverage, with 0 in the last 30 days. Confidence 38%.

Evidence (3)

  • 5Hacker News·8/15/2026research
    Auto-research with Codex delivers a 232x faster QR kernel

    A Hacker News post describes how the author used Codex in GPU Mode to iteratively optimize a batched square QR decomposition kernel for a contest. The final solution achieved a 232x speedup over the baseline and ranked 12th out of 183 participants, highlighting agent-assisted kernel tuning and auto-research workflows.

  • 3Hacker News·8/8/2026research
    Dithered QR Codes

    The article explains how QR codes can be modified by shrinking data modules and using dithering to embed an image while preserving scanability. It describes how error diffusion, especially Floyd-Steinberg dithering, can reduce the visible noise caused by the QR code’s encoded data patterns.

  • 4Hacker News·7/7/2026open_source
    Jim's TrueType QR Code Font

    Jim's TrueType QR Code Font is a QR code font project that encodes QR patterns into a TrueType font. The Hacker News post points to the project site and discussion, highlighting it as a novel way to represent QR codes as text-renderable glyphs.