Martian Vistas

Here is the Green->Blue->Red Fourier Transform analysis overlayed onto the HiRISE image for the section just south of Victoria (including the flat area around Victoria top centre - in green). This shows how well it does at picking out the differing ripple sizes. As you can see, it does not pick up some of the more isolated big ripples, however I would argue that this is not really an issue as they sit in a field of much smaller ripples (that the algorithm is detecting) and would be easy to navigate around. They are also blindingly obvious in the raw HiRISE image so I don't think we'll run into them! Apart from that, this method does a very good job of finding areas of differing ripple sizes.

Full resolution (29794 x 5152) (20.2Mb)
Half resolution (14897 x 2576) (6.8Mb)
Quarter resolution (7449 x 1288) (2.2Mb)
One Eighth resolution (3725 x 644) (660kb)