qr-code

问题 This question already has answers here : QR Code possible data types or standards (3 answers) Closed 4 years ago . I'm new with QR Code. I use AVFoundation to detect QR Code and decode it to a text. I want to ask that: How can I know the text is a link or a contact or a number,... I mean: With a QR code, can I know what type is it with using AVFoundation? Sorry for my bad english. 回答1: In the QR code, you can read the text by using a scanner seperately and if you need to read the text in

问题 I'm unable to print a QR Code generated by pe:qrCode using p:printer tag. When I set renderMethod to img or div, it doesn't render to the screen at all. I don't see any documentation on how to use that attribute. I've seen various posts about needing other jars but it looks like that was for the older p:bacode functionality. When I print directly from the browser it will print but I am printing to labels so don't want to be printing the whole page. Since it is generated by jQuery on the

问题 Good evening all wonderful helpers, I am trying to detect a QR code that I have on a scanned PDF(printed pdf with qr then scanned) The QR code will always be located on a corner of the file. Here in my following code I clone the area of which the QR is located. Help on: - looking over the document to see which corner has an image (qr) - after finding the corner that has the qr code - rotate the file so that the qr code would be located on the top left corner. Code: for (int pg = 0; pg <

问题 I was wondering if anyone has solved this problem. I want to scan a QR code from my android phone that will ultimately launch an Android App. If the app exists, the app is launched with some unique information. If the app doesn't exist then it takes the user the marketplace to download the app. Can this be done? Any help will greatly be appreciated :) 回答1: Sure, you can write an app that can do that. Barcode Scanner actually does some of the things you want (e.g. opening the market from a

问题 I need to build a QR-code for my url as small as possible - it is short enough to use shorteners (and I don't want to be dependent to their reliability). HTTP: // SUBDOM.DOMAIN.EU 8-bit byte mode is too place-wasting, I can reach Version 2 there, but Version 1 in alphanumeric mode . Is there a way how to set alphanumeric mode to use only lower-case letters instead of upper-case? May using upper-case in URL cause problem in any browser / platform? (I tested it in Firefox, IE but I am afraid,

问题 In my Application Zbar is decoding perfectly. But the problem is Zbar can decode both QR code and Bar code . So after decoding How do i get the type of Encoding Style ? thanks in advance 回答1: There are return codes for type in ZBarSymbol. You will be looking for ZBAR_QRCODE for QR codes ZBarSymbol documentation Something like this should help you to get the symbol out: - (void) readerView: (ZBarReaderView*) view didReadSymbols: (ZBarSymbolSet*) syms fromImage: (UIImage*) img { //do something

问题 Google uses UTF-8 it as default for their very popular encoder. From what I can see they don't even add the byte order mark. The problem is that most scanners still seem to use JIS8 (QR 2000) instead of iso-8859 (QR 2005) as default, so it mostly does not work to use iso-8859 for encoding. It seems like utf-8 is the only choice even if it is against the specification. edit: I will go with utf-8 without ECI and without BOM. Against all spec and spirit but works best at the moment. 回答1: The

问题 Is there any way with pure ColdFusion/cfscript to produce a QR code, without relying on external APIs or JavaScript? 回答1: No. ColdFusion cannot generate bar codes by itself. You need a separate tool or library. It is easy enough to install a java library, like ZXing. Then generate the images from CF. Alternately, you could do a <cfhttp> call to an external server that generates the bar code image for you, or basically do the same thing with javascript. You would not need to install anything

问题 I encoded the number 1639 in the two QR codes of the image below (downloadable here). I printed it, took a photo and tried to detect it: import zbar from PIL import Image scanner = zbar.ImageScanner() pil = Image.open('20180520_170027_2.jpg').convert('L') width, height = pil.size raw = pil.tobytes() image = zbar.Image(width, height, 'Y800', raw) result = scanner.scan(image) for symbol in image: print symbol.data.decode(u'utf-8') # 1639 It works, even if the size of the QR code is small (~1x1

问题 I've seen alot about this online (old posts) but nothing seems to work for me. I'm trying to generate a QR code out of a string and display it in the app. Here's what i had in the beginning qrCode = new ZXingBarcodeImageView { BarcodeFormat = BarcodeFormat.QR_CODE, BarcodeOptions = new QrCodeEncodingOptions { Height = 50, Width = 50 }, BarcodeValue = codeValue, VerticalOptions = LayoutOptions.CenterAndExpand, HorizontalOptions = LayoutOptions.CenterAndExpand }; That works fine for Android but