qr-code

问题 I'm working on a project which involves taking an image file as input on my desktop and then detecting and decoding all the barcodes present, both 1D and 2D. I've been working with zxing and with the help of GenericMultipleBarcodeReader I was able to read multiple 1D barcodes from the image. However, it fails to detect 2D barcodes. But if I crop the 2D barcode and input this cropped part separately it detects and decodes it without any problem. So, if my image has 2 1D barcode and a 2D

问题 How do you encode a carriage return in a QR barcode (so if I scan it with my android, for instance it will come up) A B C I have tried A~d013B~d013C etc. but it always shows the escape characters (among other ways I have found, none of which seem to work) 回答1: You simply encode it by putting the correct byte sequence into the QR code. Assuming you're using the default ISO-8859-1 encoding, that's just the single byte 0x0D. I imagine you know this so perhaps you are really asking how to specify

问题 How do you encode a carriage return in a QR barcode (so if I scan it with my android, for instance it will come up) A B C I have tried A~d013B~d013C etc. but it always shows the escape characters (among other ways I have found, none of which seem to work) 回答1: You simply encode it by putting the correct byte sequence into the QR code. Assuming you're using the default ISO-8859-1 encoding, that's just the single byte 0x0D. I imagine you know this so perhaps you are really asking how to specify

问题 I need to store the qrcode (generated using phpqrcode) into a db instead of placing them in a filepath. The examples given in the sourceforge project (http://phpqrcode.sourceforge.net/examples/) speaks only about storing them in a physical file path. I dont want to store them in a file path. Please advice. QRcode::png($codecontent, $filepath); 回答1: Based on the discussion in comments with the OP, and the question as precised - how to generate the QR code as ASCII - this topic is covered in

问题 This question already exists : QR Codes Recognition Algorithm [closed] Closed 6 years ago . How can I recognize QR codes in an image and draw a square when a QR code is detected? I have been working with OpenCV and Visual Studio 2010 detecting squares in general and I would want to know if there is something similar (for example,an algorithm) to that to detect QR codes. Thanks in advance. 回答1: Actually there is an algorithm to detect QR Codes that is described in ISO/IEC18004. You have to

问题 I used this answer to create a standalone Android library project that has the ZXing source code in it (ZXing v2.1). It compiles fine and if I run CaptureActivity, I can read a QR code as expected. I have another Android project from which I want to pull in this library. I have set that library relationship up correctly. The issue I am having is, how do I launch my local copy of the ZXing scanner via IntentIntegrator (mentioned here). I tried modifying the IntentIntegrator.initiateScan()

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . I have to development an QR Generator in Cocoa. but currently I was used QR Library for iPhone and ported to Cocoa by me. but just found many bugs since iPhone version in Generator Algorithm. then, Is there any QR Encoding Library in Cocoa ? 回答1: I've mostly only seen Objective-C libraries that read various code

问题 I need a library to generate a 2D bar code on iPhone and Android (and preferably WM7 and possibly j2me too) - the idea is to transfer information to another device with a corresponding scanner (decoder). What are the good options? ZXing is an option, in particular for the reading/decoding aspect, but I want to generate them on these devices. 回答1: zxing will work for Android. The Java encoder hasn't been ported to C++ (feel free to jump in and contribute ... shouldn't be that hard.) Until that

问题 I am trying to build an application in python that would encode and decode QR codes. I am successful with the encoder, but i don't find libraries(but zbar) for decoding in python. I am using Python 2.7 in a Windows 7 system. I am not able to install zbar in my system. I installed the dependency module required by the library and even then I end up with so many errors, whenever I try to install it - so many syntax errors in zbar.h and in zbarmodule.c. I don't understand why and clueless about

问题 I use qr-image plugin for Nodejs to generate a QR code and it works pretty good. The problem is showing result image in ejs. var express = require('express'); var router = express.Router(); var qr = require('qr-image'); router.get('/', function(req, res) { var code = qr.image("text to show in qr", { type: 'png', ec_level: 'H', size: 10, margin: 0 }); res.type('png'); code.pipe(res); // res.render('index', { title: 'QR Page', qr: code }); }); When i uncomment last line, nodejs crashs. How to