Patent ID: 8295622

Claim:
A method comprising: identifying a comparison tile within a source frame, the comparison tile including a plurality of available pixels; identifying at least one bit area within the comparison tile, a particular bit area of the at least one bit area being encoded with at least one message bit, the message bit being associated with a message; performing a statistical property calculation for a plurality of pixel variable values within the comparison tile; applying a modulation pattern to at least one bit area of a target frame; identifying at least one message bit in a target frame in accordance with the performing of the statistical property calculation and the applying of the modulation pattern; and wherein the applying of the modulation pattern comprises: accessing the modulation pattern; calculating an average pattern value for the comparison tile of the frame; calculating an average pixel variable value for the comparison tile; applying a matched filter to a pixel variable value of a plurality of pixels in the particular bit area in accordance with the average pattern value and the average pixel variable value to obtain a numeric value, the numeric value capable of being used to identify a particular message bit of the at least one message bit, the matched filtered being in accordance with the modulation pattern.