FormatException: FormatException: we didn't find a close enough match 0x2fe8e

[jingzhaoyang]

I get an error using gozxing to decode the QR code:

FormatException: FormatException: we didn't find a close enough match 0x2fe8e

I chose other QR code decoding libraries as a comparison, and only gozxing fails to decode, and I'm not sure if it's caused by a problem with my code.

Test image:

Here's my code:

package main

import (
	"bytes"
	"fmt"
	"image"
	"io/ioutil"
	"log"
	"os"

	"github.com/clsung/grcode"
	"github.com/liyue201/goqr"
	"github.com/makiuchi-d/gozxing"
	"github.com/makiuchi-d/gozxing/qrcode"
	ttqrcode "github.com/tuotoo/qrcode"
)

func goQR(filename string) {
	imgdata, err := ioutil.ReadFile(filename)
	if err != nil {
		fmt.Printf("%v\n", err)
		return
	}

	img, _, err := image.Decode(bytes.NewReader(imgdata))
	if err != nil {
		fmt.Printf("image.Decode error: %v\n", err)
		return
	}
	qrCodes, err := goqr.Recognize(img)
	if err != nil {
		fmt.Printf("Recognize failed: %v\n", err)
		return
	}
	for _, qrCode := range qrCodes {
		fmt.Printf("[goqr] text: %s\n", qrCode.Payload)
	}
}
func ttQR(filename string) {
	fi, err := os.Open(filename)
	if err != nil {
		fmt.Println(err.Error())
		return
	}
	defer fi.Close()
	qrmatrix, err := ttqrcode.Decode(fi)
	if err != nil {
		fmt.Println(err.Error())
		return
	}
	fmt.Printf("[tuotoo/qrcode] text: %s\n", qrmatrix.Content)

}

func gozxingQR(filename string) {
	// open and decode image file
	fileQR, _ := os.Open(filename)
	imgQR, _, _ := image.Decode(fileQR)

	// prepare BinaryBitmap
	bmp, _ := gozxing.NewBinaryBitmapFromImage(imgQR)

	// decode image
	qrReader := qrcode.NewQRCodeReader()
	result, err := qrReader.Decode(bmp, nil)
	if err != nil {
		fmt.Printf("Decode failed: %v\n", err)
		return
	}
	fmt.Printf("[gozxing/qrcode] text: %s\n", result.GetText())
}

func zbarQR(filename string) {
	results, err := grcode.GetDataFromFile(filename)
	if err != nil {
		log.Fatal(err)
	}
	if len(results) == 0 {
		log.Printf("No qrcode detected from file: %s", filename)
	}
	for _, result := range results {
		fmt.Printf("[zbarQR] text: %s\n", result)
	}

}
func main() {
	goQR("e.png")
	ttQR("e.png")
	gozxingQR("e.png")
	zbarQR("e.png")
}

Result:

[goqr] text: 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
[tuotoo/qrcode] text: 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
Decode failed: FormatException: FormatException: we didn't find a close enough match 0x2fe8e
[zbarQR] text: 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

[makiuchi-d]

Try NewQRCodeMultiReader() in github.com/makiuchi-d/gozxing/multi/qrcode. It has different detection algorithm.

func gozxingQR(filename string) {
	// open and decode image file
	fileQR, _ := os.Open(filename)
	imgQR, _, _ := image.Decode(fileQR)

	// prepare BinaryBitmap
	bmp, _ := gozxing.NewBinaryBitmapFromImage(imgQR)

	// decode image
	qrReader := qrcode.NewQRCodeMultiReader()
	result, err := qrReader.DecodeMultiple(bmp, nil)
	if err != nil {
		fmt.Printf("Decode failed: %v\n", err)
		return
	}
	fmt.Printf("[gozxing/multi/qrcode] text: %s\n", result[0].GetText())
}

[jingzhaoyang]

Thanks for your reply, it works fine using the code you provided. Was the reason it didn't work before because there were other pixels interfering with the QR code?