Code Scanner 1D/2D Bar/QR

1D/2D printed code (barcode/QR) scanner.
Camera itself and 'camera access' permission are mandatory (obvious technical reasons) to enter the scan function.
Only back side camera may be used for scan. An appropriate resolution is required.
Optionally 'storage write' permission is required to save a scanned picture (user defined option, initially set off).
Further 'external storage read' permission is required to load images for barcode/QR detection.
Loading images is an optional functionality.
No network access/connection is necessary, no user data is accessed.
Hint: Stored pictures (i.e. scans) may be accessed from other applications if the store option is enabled.
Scan results (the last decoded 16 scans) will be optionally stored in the internal application data.
The function may be disabled from settings. The history will be removed if the function is disabled.