qr-code

问题 So, I'm building a test project on java using Selenium, with gradle. Right now I need to scan a QR Code from a previously taken screenshot. I looked around how to do it, and the ZXing scanner code seems like the best suggestion. (Please let me know if it isn't.) My problem is, from the moment I add the 'com.google.zxing:zxingorg:3.3.1' dependency to my build.gradle file, even if I don't write any additional code with it (I've tried with and without), the web driver stops working, and I get

问题 First of all, I read through all those topics how to use Zxing in Java but always got errors with missing com.google.zxing.client.j2se.* (I loaded the zxing core-3.2.1.jar in eclipse and all other zxing packages work unless j2se) or just found solutions for creating qr images... My aim is to write one single method which gets an image file finds the qr code in this image, decodes the qr code and returns the string, basically it should be something like the following: import com.google.zxing.*

问题 While integrating python library qrcode==6.1 with django==3.1.2. I have been trying to generate a qrcode which will contain the URL links for my other websites. Models.py from django.db import models import qrcode from io import BytesIO from django.core.files import File from PIL import Image, ImageDraw # Create your models here. class Website(models.Model): name = models.CharField(max_length=200) qr_code = models.ImageField(upload_to='qr_codes', blank=True) def __str__(self): return str(self

问题 I want to make a script for detecting and reading QR codes from photos. I would like to use PyZbar for that, but I have a problem with some errors. I'm working in google colaboratory !sudo apt install tesseract-ocr !pip install pytesseract !pip install pyzbar[scripts] import shutil import os import random import re import cv2 import numpy as np import pytesseract from pytesseract import Output %matplotlib inline import matplotlib as mpl import matplotlib.pyplot as plt import matplotlib.pylab

问题 I need to capture and read a QR Code while the camera is capturing, all of this in a JSF Application. I have already read a QR Code in a photo, but for now I have to make it "alive". Anyone has any suggestion? I'm trying to use the p:photoCam of PrimeFaces. This is the method, using Zxing to read the QR code: /** * * @param filePath * @param charset * @param hintMap * * @return Qr Code value * * @throws FileNotFoundException * @throws IOException * @throws NotFoundException */ public static

问题 I'm trying to make a loyalty app by QR scan and unsure how I can get the string value of the QR code generated to each user and then store it in firebase so that it links to a specific user then update the number of times the user's QR code has been scanned in a sub-collection linked to the user collection. QrImage( data: '${user?.uid}', version: QrVersions.auto, size: 300, errorStateBuilder: (cxt, err) { return Container( child: Center( child: Text('Error', textAlign: TextAlign.center, style

问题 Having some information for QR version 40 (177*177 modules) with correction level L (7% error correction) Version: 40 Error Correction Level : L Data bits: 23.648 Numeric Mode: 7089 Alphanumeric Mode: 4296 Byte Mode: 2953 I don’t know about these points: Does 1 module equal 1 bit? How to calculate the maximum number of data bits in a QR code type? e.g Why do we have 23,648 for data bits? How to convert data bits to Numeric/Alphanumeric in a QR code type? e.g. why do we have 7,089 for Numeric

问题 Having some information for QR version 40 (177*177 modules) with correction level L (7% error correction) Version: 40 Error Correction Level : L Data bits: 23.648 Numeric Mode: 7089 Alphanumeric Mode: 4296 Byte Mode: 2953 I don’t know about these points: Does 1 module equal 1 bit? How to calculate the maximum number of data bits in a QR code type? e.g Why do we have 23,648 for data bits? How to convert data bits to Numeric/Alphanumeric in a QR code type? e.g. why do we have 7,089 for Numeric

问题 I have a library of hundreds of pictures from which I need to extract information encoded in a QR code in each picture. For 70% of the pictures, pyzbar simply works. For more difficult cases, I try non-linear binarization of the image as suggested by this post: https://stackoverflow.com/a/61443430/1579211 This gets me another 15-20% of the way. But for about 10% of the images this fails: from PIL import Image from pyzbar.pyzbar import decode, ZBarSymbol from kraken.binarization import nlbin

问题 I have a library of hundreds of pictures from which I need to extract information encoded in a QR code in each picture. For 70% of the pictures, pyzbar simply works. For more difficult cases, I try non-linear binarization of the image as suggested by this post: https://stackoverflow.com/a/61443430/1579211 This gets me another 15-20% of the way. But for about 10% of the images this fails: from PIL import Image from pyzbar.pyzbar import decode, ZBarSymbol from kraken.binarization import nlbin