> I had a much simpler idea: overlay the previous frame on the video field, offset > by the desired amount (say, 70%). This is what many consumer digicams do in > panorama mode, including my cell phone. It is then obvious to the user to turn > the screen until the overlaid image aligns with the camera output. Based on the > Video Chat/Virtual Whiteboard mockups, it seems like we have accelerated alpha > on top of video on the LX, but I don't know this for sure...
This method doesn't really require transparency to function, if it becomes CPU intensive. The "edge" is the most important part, so we can do an opaque overlay without sacrificing too much functionality. Obviously you can infer more data about the rotation (about the center of the image), which could accumulate and make the last-to-first stitch impossible, but since it can sit on a table or rock and swivel, this might not be a big concern. - Eben
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