Fundamentos do código QR
Core concepts every QR code user should understand — from basic structure and versions to encoding modes, error correction, and how scanners decode symbols.
O que é um QR Code? Uma introdução completa
The definitive beginner guide to QR codes — history, structure, how they work, and why they matter in 2026.
Anatomia do QR Code: cada componente explicado
Detailed breakdown of QR code components: finder patterns, timing patterns, alignment markers, data regions, and format information.
Versões de QR Code 1-40: Tamanho, Capacidade e Seleção
Complete reference for all 40 QR code versions — module counts, data capacity per EC level, and how to choose …
Modos de codificação: numérico, alfanumérico, byte, kanji e ECI
How QR codes encode data: five modes with different character sets and efficiency. When to use each mode and mixed-mode …
Níveis de correção de erros L, M, Q, H: como escolher
Understanding error correction levels and their trade-offs. When to use L (7%), M (15%), Q (25%), or H (30%) recovery.
Como funciona a leitura de QR Codes: da câmera aos dados
The complete decoding pipeline: image capture, binarisation, finder detection, format reading, unmasking, error correction, and data extraction.
QR Codes estáticos vs dinâmicos: Prós, contras e quando usar cada um
Compare static and dynamic QR codes: functionality, cost, analytics, flexibility, and which type fits your needs.
Capacidade de dados do QR Code: caracteres máximos por versão e modo
Complete capacity tables for all 40 versions across all EC levels and encoding modes. How to calculate the required version …
QR Code vs Código de Barras: Por Que o 2D Venceu
How QR codes surpassed traditional 1D barcodes: capacity, speed, error correction, and versatility comparison.
Padrões de máscara: a otimização oculta em cada QR Code
The eight mask patterns, penalty scoring, and how the encoder selects the optimal mask for readability.
O padrão de localização: Por que os QR Codes têm três quadrados
The 1:1:3:1:1 ratio, detection algorithm, and why three squares in specific corners enable instant orientation from any angle.
Correção de erros Reed-Solomon em QR Codes
How Reed-Solomon codes work in QR codes: Galois field arithmetic, generator polynomials, and codeword interleaving.
Micro QR e rMQR: alternativas compactas ao QR padrão
When standard QR codes are too large: Micro QR (M1-M4) and Rectangular Micro QR (rMQR) variants for space-constrained applications.
Padrões de QR Code: ISO 18004 e além
International standards governing QR codes: ISO/IEC 18004, JIS X 0510, GS1 Digital Link, EMV QR, and industry-specific specs.
A história dos QR Codes: Da Toyota ao padrão global
QR code history from 1994 invention at DENSO WAVE through ISO standardisation, smartphone adoption, and COVID-era boom.