How do I create a shapefile showing footprints of Rasters?

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I have around 1,000 satellite images in tiff format, and I want to create a shapefile which will serve as an index to the rasters. This is something similar to a raster catalog, but I do not want to build a raster catalog.

Some obstacles I can forsee, is that the image are georefrenced, so they are not rectangular in shape (I am talking about the data area).

Update To clarify, I require the polygon to cover only the non-zero (or non nodata) pixels of the raster, and not the entire rectangular raster. Most of the answers so far, give a rectangular polygon, which covers the data, as well as the non-data pixels.

My Image


Result given by tools I have examined (like raster catlog, various Arcscripts, custom Python script given in one of the answers):


Result that I want:




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