Use QR code to simulate an images, either by free bits or correction.

[RexWzh]

Plot image inside QR code

1. Using error correction ✓
2. Using free bits ✓
3. Using free bits and error correction ✓

Notes about the above methods:

1. Method 1 requires the QR code to have as many EC codewords as possible, in other words, to use higher ErrCorrLevel.
2. Method 2 requires the QR code to have free bits as many as possible, equivalently, to use lower ErrCorrLevel.
3. In method 3, ErrCorrLevel is a tradeoff between codewords and free bits.
4. In general, larger Version makes more room for creation.
5. Mask is used to make the QR code more detectable. In our case, we can enumerate over the masks to find the best simulation of the image.

Current progress

• Method 2 requires tools for solving linear equations over GF(256).

---

Hope this can be done before the conference :grin:

[RexWzh]

When a QRCode can plot images, it can plot anything in fact...

An idea by Saar Ibuki.