Jeremy posted:
"This image is so overprocessed that one could see anything in it. If you are going to reach this far down to the pixel level I am sure I could find similar level of artificiality in an image of a sunspot."
Not so Jeremy. I have run hundreds of the Mars images through the threshold function and only a small percentage of them show any signs of rectilinear forms. I am very familiar with the type of artifacts that can show up with this process if an image is over-sharpened before thresholding and there may be a few artifacts in this image but I think for the most part what is shown is edges of structure.
