Lenovo A600 Lenovo IdeaCentre A600 User Guide V1.0 - Page 34

3.5.3 Avoid making the following expressions: Laughing Raising your eyebrows Closing your eyes Looking away from the camera Looking sideways Frowning 3.5.4 Image change: Although the Lenovo VeriFace will already account for some particular situations like varying hairstyles or facial hair, some significant changes, such as shaving off a beard, can affect the accuracy of the face image verification. To avoid failed verification, register a new face image. For more information, see Register face image. 3.5.5 Light: Ensure you are in an environment with steady and even light. The following situations may affect the results: Bright light behind your head A window with bright light Bright light pointed directly at your face or the camera Insufficient, directional light, such as a reading lamp Darkness 3.5.6 Glasses: Because different glasses have different effects on light, we recommend that you to take off your glasses or wear colorless glasses with very narrow rims. Be sunglasses or sport glasses. 3.5.7 Video camera: Be sure to use the same video camera when you log in or out. Images taken by different video cameras might produce different effects, which can cause the face verification to fail. For more detail information, please click "?" to get the help document. 31036433_A6_UG_EN_V1.0.indd 29 User Guide 29 2009.1.19 6:47:27 PM