Compare Chrome extensions: ScanQR vs 划词小窗搜题

Scans QR codes and displays their contents on a Chromebook or other computer with a suitable webcam. What's a "suitable" webcam? It's one that can focus the QR code within the red square in the app sharply enough that the app can decode it. My test results:

• Chromebook Pixel: yes
• Samsung ARM Chromebook: yes
• Acer C7 Chromebook: yes
• CR48: yes
• 2009 MacBook Pro: yes, except for very small, dense QR codes
• 2011 iMac: no, unless the QR code is ridiculously large (over one foot across)

If Chrome implements an API to let developers adjust camera-focus settings, I'll be able to improve the app to work with more cameras.

Source: https://github.com/sowbug/scanqr-app