qrcode

qrcode

This pacakge can simple QR code encoding. It only supoprts version 1, so very short string can only be encoded.

How to use

install package

go get github.com/ksrnnb/qrcode

Example

package main

import (
	"fmt"
	"os"

	"github.com/ksrnnb/qrcode"
)

func main() {
	q, err := qrcode.New(qrcode.ECL_Medium, "Hello, World")
	if err != nil {
		fmt.Fprintf(os.Stderr, "cannot be encoded: %v\n", err)
		return
	}

	size := 255
	p, err := q.PNG(size)
	if err != nil {
		fmt.Fprintf(os.Stderr, "png encode error: %v\n", err)
		return
	}

	err = os.WriteFile("qrcode.png", p, 0666)
	if err != nil {
		fmt.Fprintf(os.Stderr, "write file error: %v\n", err)
		return
	}
}

Reference

• https://github.com/skip2/go-qrcode

Japanese Reference

• JIS X 0510 2018
  • https://www.jisc.go.jp/app/jis/general/GnrJISNumberNameSearchList?toGnrJISStandardDetailList (only view)
• ＱＲコードをつくってみる
• 例題で学ぶ符号理論入門
• 例題が語る符号理論 BCH符号・RS符号・QRコード