關於 QR Code
About QR Codes
QR Code(Quick Response Code)是二維條碼,由日本電裝(Denso Wave)於 1994 年發明。它用黑白方塊矩陣編碼文字資料,手機相機可在毫秒內辨識。QR Code 主要分為四種版本(Version 1–40),版本越高,模組數越多,可容納的資料量也越大。
QR Code (Quick Response Code) is a two-dimensional barcode invented by Denso Wave in Japan in 1994. It encodes text data in a matrix of black and white squares that a phone camera can read in milliseconds. QR codes range from Version 1 (21×21 modules) to Version 40 (177×177 modules) — higher versions hold more data but produce denser, harder-to-scan codes.
糾錯等級: L(7%)、M(15%)、Q(25%)、H(30%)— 數字代表即使部分損壞,QR Code 仍能被正確讀取的比例。日常用途選 M;若計劃在 QR Code 中央加上 logo,請選 H(30% 還原能力)讓 logo 遮住部分模組後仍可掃描。
Error correction levels: L (7%), M (15%), Q (25%), H (30%) — the percentage of data that can be recovered even if the code is partially damaged or obscured. M is the right default for most uses. Choose H if you plan to overlay a logo in the centre — the 30% recovery capacity lets the logo cover modules while the code remains scannable.
資料容量與掃描建議: QR Code 依糾錯等級與內容類型有不同的容量上限。最大版本 40 在最低糾錯 L 下,可容納約 2,953 個 UTF-8 位元組、1,817 個英數字或 984 個漢字(ISO/IEC 18004)。網址保持在 200 字元以內最理想 — 產出的 QR Code 緊湊,低解析相機也容易掃描。列印時建議最小尺寸 2 cm × 2 cm,四周保留 ISO/IEC 18004 規範的靜區(至少 4 個模組寬)以確保各種掃描器都能辨識。
Capacity and scanning best practices: Capacity depends on error-correction level and content type. At version 40 with the lowest correction L, a QR code holds about 2,953 UTF-8 bytes, 1,817 alphanumeric characters, or 984 Kanji (ISO/IEC 18004). For URLs, keeping the input under 200 characters produces a compact code that low-resolution cameras can read reliably. When printing, use at least 2 cm × 2 cm and preserve the ISO/IEC 18004 quiet zone — at least 4 modules wide on every side — so older or more conservative scanners still decode it.
「QR Code」是 Denso Wave Incorporated 的註冊商標。其規格已公開為 ISO/IEC 18004 標準,專利權人選擇不行使專利,因此產生 QR Code 免費;此處標註商標僅為標示用途。請僅將產生的 QR Code 用於合法用途——切勿編碼釣魚、惡意或詐騙連結。
“QR Code” is a registered trademark of DENSO WAVE INCORPORATED. Its specification is published as the ISO/IEC 18004 standard and the patent owner has chosen not to exercise patent rights, so generating QR codes is free of charge; the trademark is acknowledged here for attribution only. Please use the codes you generate for lawful purposes only — never encode phishing, malware, or scam links.