sol invictus
Philosopher
- Joined
- Oct 21, 2007
- Messages
- 8,613
Over what timescale? Certainly not the timeline we see in that Gold RD image from LMSAL.
Assuming "RD" stands for "running difference", that was made by more or less the exact opposite of the type of image processing I just described - so why do you ask?
Are you going to respond to my post?
sol invictus said:Let me ask this - suppose I took a series of photographs of the Himalayas from a vantage point high overhead, on a day with some scattered cloud cover, then made a RD movie out of them. Do you think that would be a good way to see the topography of the mountains?
I'll answer the question for you - absolutely not! What you'd see is the moving clouds only, and none of the fixed features. The RD images reveal changes in the original images (which in my example occur when clouds move), not fixed features of them. Making RD images is exactly the wrong thing to do to look for solid features.
The right thing to do is to add many images together; that's a powerful technique that's sometimes used in astronomy to reveal faint but persistent features that would otherwise be lost in noise. Why don't you try that, Michael?
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