US Patent 9922390 Watermarking system

A method of watermarking includes determining a first substantially uniform color pixel space in a first frame of a video, determining a first offset color based on the first substantially uniform color pixel space, and compositing a first watermark trace of a watermark key having the first offset color into the substantially uniform color pixel space so that a modified video frame is creating having the first watermark trace of the watermark key having the first offset color.