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Via /. We present a novel photographic technique called dual photography, which exploits Helmholtz reciprocity to interchange the lights and cameras in a scene. With a video projector providing structured illumination, reciprocity permits us to generate pictures from the viewpoint of the projector, even though no camera was present at that location. The technique is completely image-based, requiring no knowledge of scene geometry or surface properties, and by its nature automatically includes all transport paths, including shadows, interreflections and caustics. I need to really read this again and watch the video. Link.

Here’s a simple and fun project to do with Google maps and Flickr. Flickr member iDanSimpson has a step by step on taking a screenshot of a location, zooming out and using the build in slideshow to make a little view of just how small things are. It’s much like a DIY “Powers of 10”. Link.