Your camera should meet the following requirements in order to
obtain document images that can be reliably recognized.
Recommended camera characteristics
Image sensor: 5 million pixels for A4 pages. Smaller sensors
may be sufficient for taking pictures of smaller documents such as
business cards.
Flash disable feature
Manual aperture control, i.e. availability of Av or full manual
mode
Manual focusing
An anti-shake system or ability to use a tripod
Optical zoom
Minimum requirements
Image sensor: 2 million pixels for A4 pages
Variable focal distance. Fixed-focus cameras (lens focused on
infinity) should not be used to photograph documents. These types
of camera are commonly built into mobile phones and PDAs.
Note: For detailed information about your camera, please
refer to the documentation supplied with your device.