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The goal of this tutorial is to go through the code that allows the user to create a qr code and barcode reader using Python.
The video is divided into 3 parts:
Part 1 - How to read QR code and barcode from image
Part 2 - How to read QR code and barcode using your camera
Part 3 - How to create a system that checks the valid and used QR codes
The libraries used in this tutorial are cv2 and pyzbar.
These days, you can find QR codes on everything from candy wrappers to billboards. Scanning these modern-day barcodes with your smartphone lets you quickly open a web page, download an app, send a text message, and much more. Many restaurants and bars are even replacing their menus with QR codes, while some stores allow you to pay with a QR code now, so you don’t have to touch anything. Here’s how to scan a QR code with your iPhone or Android phone and what to do when you can’t scan them.
How to Scan a QR Code on an iPhone
To scan a QR code on your iPhone, all you have to do is open the Camera app and point your phone at the QR code. Make sure the QR code is inside the box on your screen, and then tap the pop-up banner or the yellow QR code icon in the bottom-right corner.
- Open the Camera app on your
iPhone. You can quickly open the camera app by swiping
left from the lock screen. Or you can swipe down from the middle of
your home screen and type “Camera” into the search bar at the top
of your screen.
- Then point your iPhone at the QR code to scan it. You don’t have to fill the entire screen, but make sure that you can see all four corners of the QR code in the app. Once you correctly scan the QR code, a pop-up banner will appear above it, and you will also see a yellow QR code icon appear in the bottom right corner.
- Finally, tap the pop-up banner or the QR icon in the bottom-right corner of the app. This will immediately send you to the website, open the app, or perform another action, so make sure you know what the banner does before tapping on it.
If you don’t see the banner or QR icon, make sure that you have the Scan QR Codes feature enabled. You can do this by going to Settings > Camera and tapping the slider next to Scan QR Codes. You will know it is turned on when it is green.
If you still don’t see the pop-up banner or QR code icon, take a picture of the QR code and open it in the Photos app. Then tap the Live Text icon that looks like three lines in a box in the bottom-right corner. Finally, tap the QR code, and then the pop-up banner should appear.
If you want to know more about how to take a screenshot on an iPhone, check out our step-by-step guide here.
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How to Scan a QR code on an Android Phone
If you’re running Android 8 or later, you can scan a QR code by opening the camera app, pointing your phone at the QR code, and tapping the pop-up banner. If you don’t see the pop-up banner, you can use the Google Lens app to scan the QR code instead.
- Open the Camera app on your Android
phone. You can open the camera app by swiping up from the
bottom of your screen. Or you can tap the search bar on your home
screen and enter “Camera.”
- Then point your Android phone at the QR code to scan it. Make sure that all four corners of the QR code are visible in the viewfinder. If you are running Android 8 or later, you should see a pop-up banner appear.
- Finally, tap the pop-up banner. This will immediately send you to the website, open the app, or perform another action, so make sure you know what the banner does before tapping on it.
If you don’t see the banner appear, you can use Google Lens instead. You might see the Lens icon (which looks like a circle inside a broken box) somewhere on your screen. Or you might have to tap Modes (or More) in the bottom-right corner of the app and select Lens. Then place the QR code in the white lines and tap the magnifying glass icon to scan it.
You can also open Lens on some phones by tapping and holding the QR code on your screen until you see a multi-colored spinning wheel. Then tap the pop-up banner when it appears above the QR code.
If Google Lens isn’t working in your camera app, you might have to enable it in your settings. You can check your camera settings in the app or in the general settings on your Android. Then enable the Google Lens suggestions option.
You can also download the Google Lens app from the Google Play Store. Once you open the app, move the QR code to the center of the viewfinder and tap the magnifying glass icon at the bottom of your screen to scan it.
If you are running Android 7 or earlier, your phone might not be compatible with the app, but you might already have the Google Lens feature on your Android device. To find out, press the Home button at the bottom of your device (or the line at the bottom of your screen) until the Google Assistant pops up. Then tap the Google Lens icon or select the microphone icons and say, “open Google Lens.”
If all else fails, you can take a picture or screenshot of the QR code, open the Google Photos app, and tap the Google Lens icon below that picture.
If you want to know how to take a screenshot on your Android phone, check out our step-by-step guide here.
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Paypal: https://www.paypal.com/donate?hosted_button_id=VTHHMH6QP4LCL
https://www.buymeacoffee.com/Kostadin
The goal of this tutorial is to go through the code that allows the user to create a qr code and barcode reader using Python.
The video is divided into 3 parts:
Part 1 - How to read QR code and barcode from image
Part 2 - How to read QR code and barcode using your camera
Part 3 - How to create a system that checks the valid and used QR codes
The libraries used in this tutorial are cv2 and pyzbar.
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