1. A method for rejecting information using a mobile device, the method comprising: obtaining a video frame using a camera coupled to the mobile device; detecting an at least one portion of the video frame at least partially representing a feature; identifying a first shift associated with the at least one portion of the video frame; identifying a second shift associated with an entire video frame; determining a disparity between the first shift and the second shift; determining flickering in a detection of the feature by determining that the disparity is higher than a predetermined threshold; and rejecting the at least one portion of the video frame at least partially representing the feature as a false positive detection due to flickering.