qr-code

问题 I converted the jar file into .net dll file using IKVM. Now i am trying to consume it in my .net app, but it seems that the qrcodereader.decode requires BinaryBitmap which further requires Luminance as parameter. Please guide me in this situation since i couldn't find the right classes that implements the abstract classes. 回答1: Luminance sources are platform specific. You can find examples in the android, java2se, and iphone directories. I don't know if there are any luminance sources in the

问题 I'm implementing an exerimental QR code parser and I figured it would be handy to override a list's __getitem__ that takes a given mask into account, like this: m = [[1, 0], [0, 1]] def mask(m, i, j): if i % 2 == 0 or j == 0: return int(not m[i][j]) return m[i][j] m2 = list_with_mask(m, mask) n = m2[0][0] How can I achieve it in the most Pythonic way? 回答1: Quick & dirty implementation, maybe it's better to inherit from the built-in list class. Not directly what OP asked but but at least it's

问题 I've been trying to figure out how to scan and use the QR codes provided with Cardboard devices without needing to use the Unity API. I've already written SCN-VR for SceneKit based VR for iOS devices with Obj-c and I would want scanning QR codes to also work to make setting up profiles simpler. I've seen a QR code scan to goo.gl/pdNRON, which leads to a page on how to download the Google Cardboard app, but what HTTP service is the Google Cardboard app going to download the actual profile? 回答1

问题 I've a project where I scan a QR code, and it will then automatically print out information based on which code was scanned. I have the scanner, and a printer. Each QR code is to correspond to a URL. I can get the scanner to fill an input field, and I can get an alert to show the information that was scanned. However, whenever I try to assign the URL it simply appends the information to the current URL, instead of replacing it. I need it to replace the current URL. Does anyone know why it is

问题 I've seen in several places on the web (e.g. here and here and here) a table showing the number of characters each type of QR Code (1 to 40) can display depending on character type and EC level. What I haven't been able to find or work out is the formula used to generate this table? i.e. QR_Type & EC_Level & Character_Type => Max character length I want to use this formula to work out the lowest QR type that can be used to display an input string, given a chosen EC level and by detecting the

问题 I was wondering is there any libraries that can decode QR code bit array instead of image. For eaxample: { {1,1,1,1,1,1,1,0,0,0,1,0,1,0,1,1,1,1,1,1,1}, {1,0,0,0,0,0,1,0,1,0,1,0,1,0,1,0,0,0,0,0,1}, {1,0,1,1,1,0,1,0,1,0,1,1,0,0,1,0,1,1,1,0,1}, {1,0,1,1,1,0,1,0,0,0,0,0,1,0,1,0,1,1,1,0,1}, {1,0,1,1,1,0,1,0,1,1,1,1,1,0,1,0,1,1,1,0,1}, {1,0,0,0,0,0,1,0,1,1,1,0,0,0,1,0,0,0,0,0,1}, {1,1,1,1,1,1,1,0,1,0,1,0,1,0,1,1,1,1,1,1,1}, {0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0}, {1,1,0,1,0,0,1,1,0,0,1,1,1,0,1

问题 I was working on QR code scanner app on iOS where i was getting output AVCaptureOutput on the delegate method captureOutput:didOutputMetadataObjects:fromConnection: . It was working perfectly on swift 3. After I've updated to xcode 9 and swift 4, it stopped working. 回答1: Okay I've found an update here. Found that AVCaptureMetadataOutputObjectsDelegate method is changed from captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection:

问题 I want to integrate zxing qr code scanner in my application which is having three tabs in my application. Currently when my one of the tab bar butto gets pressed at that time I am calling zxing qr code's scann activity but when ever its calling it is showing error like below. java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.beepz/com.google.zxing.client.android.CaptureActivity}: java.lang.RuntimeException: Your content must have a TabHost whose id attribute is

问题 OK I am having an issue producing QR Codes in FOP 1.1 using barcode4j-2.1 and zxing-0.1.2. I currently have a FOP 1.0 implementation working correctly, by adding <prefer-renderer>true</prefer-renderer> to the fop configuration file. barcode4j barcodes are working regardless if prefer renderer is set or not, fixed in barcode4j-2.1. I have all necessary dependancies: fop-zxing-0.1.2-jar-with-dependencies.jar barcode4j-fop-ext-complete.jar saxon9he.jar - using for xslt 2.0 ... here is the

问题 I am using DirectShow.Net to stream a webcam to my C# (4.0) app for reading QR codes. It is taking a snapshot every .5 seconds to see if it can find any QR codes and decode them. This works great on my dev computer at any resolution I can get my webcam to, but when I try it on a target machine (Panasonic CF-U1 Toughbook - Intel Atom processor) it really starts to bog down when I go to a higher resolutions than 800x600 on the webcam. I am using the Capture class from the DirectShow.Net DxSnap