2012-08-12

Valchava workshop, day one

Today was the start of a computer-vision-meets-astronomy workshop convened by Michael Hirsch and Bernard Schölkopf in Valchava, Switzerland. The talks are informal, discussion ample, and we plan to spend the mornings hacking on problems of mutual interest. I came down from Heidelberg with Felix Hormuth (MPIA), who brought a few hard drives of lucky-imaging data for us to play with.

Bill Freeman (MIT) kicked things off by talking about his project to make an image of the Earth, using Earthshine on the Moon as his data source. The idea is that the details of the shadows on craters should encode (low-resolution) information about the image of the Earth. Crazy! It is like an inverted or messed-up pinhole camera, and he showed some outrageously high-performance prior work using occulters in an otherwise open spaces to do imaging (like video of people walking around in rooms compared with reference images telling you what scene is outside the window of the room!). He also showed some work exaggerating or amplifying tiny differences in images used to extrapolate slow processes in time; I recommended he look at HST imaging of things like V838 Monocerotis to make data-driven predictions of the pre-explosion and future state.

Christian Schuler (Tübingen) showed incredible results on blind and non-blind deconvolution of images with nasty or complicated point-spread functions. Schölkopf and I got interested in applying his methods to astronomical data—particularly his methods for determining the PSF blind—we plan to hack on this tomorrow morning.

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