Alignment Pattern
QR Code Alignment Pattern
Smaller square patterns in larger QR codes that help correct distortion when scanning at an angle.
Техническая деталь
Alignment Patterns encode data in a 2D matrix of black and white modules (squares). Version 1 is 21x21 modules; version 40 is 177x177, storing up to 4,296 alphanumeric characters. Four error correction levels (L:7%, M:15%, Q:25%, H:30%) add Reed-Solomon redundancy, allowing data recovery from damaged or partially obscured codes. The three large finder patterns in corners enable orientation detection, while alignment patterns (added in version 2+) compensate for surface curvature and printing distortion.
Пример
```javascript
// QR code generation with error correction
const qr = generateQR({
data: 'https://peasytools.com',
size: 256, // pixels
errorCorrection: 'M', // L(7%), M(15%), Q(25%), H(30%)
margin: 4, // quiet zone modules
});
// Output as SVG (scalable, smallest file size)
document.getElementById('qr').innerHTML = qr.toSVG();
```
Связанные инструменты
Q
QR Data Analyzer
Q
QR Capacity Reference
W
Wi-Fi QR Config Builder
V
vCard QR Builder
E
Error Correction Calculator
B
Barcode Format Reference
B
Barcode Validator
Q
QR Data Formatter
E
Event QR Generator
E
Email QR Generator
S
SMS QR Generator
G
Geo Location QR Generator
P
Phone Call QR Generator
M
MeCard Generator
A
App Store Link Generator
Связанные термины
Glob Pattern
QR Code Version
Module
Error Correction Level
Finder Pattern
Quiet Zone
Data Matrix
EAN-13
UPC-A
Code 128
Code 39
Aztec Code
PDF417
Micro QR
ISBN
ITF-14
vCard QR
WiFi QR
Masking Pattern
Reed-Solomon
rMQR
GS1 DataBar
MaxiCode
Codabar
QR Code Capacity
Han Xin Code
Structured Append
ISSN Barcode
Pharmacode
DotCode
GTIN