二维码基础知识
Core concepts every QR code user should understand — from basic structure and versions to encoding modes, error correction, and how scanners decode symbols.
什么是QR Code？完整入门介绍
The definitive beginner guide to QR codes — history, structure, how they work, and why they matter in 2026.
QR Code解析：每个组成部分详解
Detailed breakdown of QR code components: finder patterns, timing patterns, alignment markers, data regions, and format information.
QR Code版本1-40：大小、容量和选择
Complete reference for all 40 QR code versions — module counts, data capacity per EC level, and how to choose …
编码模式：数字、字母数字、字节、汉字和ECI
How QR codes encode data: five modes with different character sets and efficiency. When to use each mode and mixed-mode …
纠错级别 L、M、Q、H：如何选择
Understanding error correction levels and their trade-offs. When to use L (7%), M (15%), Q (25%), or H (30%) recovery.
QR Code扫描原理：从摄像头到数据
The complete decoding pipeline: image capture, binarisation, finder detection, format reading, unmasking, error correction, and data extraction.
静态vs动态QR Codes：优缺点与适用场景
Compare static and dynamic QR codes: functionality, cost, analytics, flexibility, and which type fits your needs.
QR Code数据容量：按版本和模式的最大字符数
Complete capacity tables for all 40 versions across all EC levels and encoding modes. How to calculate the required version …
QR Code vs 条形码：为什么2D获胜
How QR codes surpassed traditional 1D barcodes: capacity, speed, error correction, and versatility comparison.
掩码图案：每个QR Code中隐藏的优化
The eight mask patterns, penalty scoring, and how the encoder selects the optimal mask for readability.
定位图案：为什么QR Codes有三个方块
The 1:1:3:1:1 ratio, detection algorithm, and why three squares in specific corners enable instant orientation from any angle.
QR Codes中的Reed-Solomon纠错
How Reed-Solomon codes work in QR codes: Galois field arithmetic, generator polynomials, and codeword interleaving.
Micro QR与rMQR：标准QR的紧凑替代方案
When standard QR codes are too large: Micro QR (M1-M4) and Rectangular Micro QR (rMQR) variants for space-constrained applications.
QR Code标准：ISO 18004及更多
International standards governing QR codes: ISO/IEC 18004, JIS X 0510, GS1 Digital Link, EMV QR, and industry-specific specs.
QR Codes的历史：从丰田到全球标准
QR code history from 1994 invention at DENSO WAVE through ISO standardisation, smartphone adoption, and COVID-era boom.