Often, a photographer takes a numbe of photos in a row.  It would be nice to have a side-by-side comparison with (at least) two different photos, with F-Spot making suggestions on which one is better in technical ways.

===== Ideas =====

==== Manually ====
  * There should be an interface to pan & zoom around two images in sync.

==== Auto-Groups ====
Groups of photos can be determined by:
  * Time gaps (or, rather, lack thereof)
  * Dramatic shifts of photo attributes (can be determined by change of ISO/f-stop/shutter speed)

==== Sharpness ====
Ways to determine image sharpness...
  * Compare the size of compressed files to see which is larger.  Sharper images of the same subject under the same conditions are larger in file size.
  * Analyze edges (like the result of "find edges" in GIMP).  Those pictures with the same subject (under similar enough conditions) with stronger edges overall should be sharper.