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Forum: Pentax K-1 02-05-2017, 05:25 PM  
White dots... Just once.
Posted By rechmbrs
Replies: 13
Views: 1,058
Do you mind showing us a small window of the image with no clarity adjustment and couple of adjusted ones? In looking on Wikipedia, clarity is sharpening in the mid range and at a few pixels from center. Meaning bringing up spatial frequencies back from Nyquist. If you do the demo, you might push to the limit on one.
I remember seeing Capoeira on the beaches in Brazil. Really interesting. That was years ago but daughter hosted Brazilian Dance Company just a couple of years ago. Watching the fine art of Capoeira was a treat.

Been an interesting problem.
Forum: Pentax K-1 02-04-2017, 05:18 PM  
White dots... Just once.
Posted By rechmbrs
Replies: 13
Views: 1,058
Clarity is probably implemented via deriving an operator from the image but with limited spatial range.
There are few processes that work well if the spectral characteristics are not shared by all pixels.
I do less sharpening but increase the display level a tad. Haven't figured out units of a tad yet.

Forum: Pentax K-1 02-04-2017, 04:54 PM  
White dots... Just once.
Posted By rechmbrs
Replies: 13
Views: 1,058
I would suspect that sharpening has accentuated much smaller anomalies to the point of clipping. Naturally these guys were sweating. The sweat most likely was being cast from their bodies making small drops which are very reflective. Very small white specs then show in photo and became larger after sharpening. I see this being like the white spikes in photos of active water. Many PixelShift examples show this problem. I find that many PS samples to be over sharpened and the spray of water acts like the sweat.
Probably don't see this problem when shooting most shots but any liquid spray does not share the same spectral content as the objects being photographed.

I think that: Sharpening should be the last process before display and noises in the image will cause the least damage to the final image. Large sharpening on PixelShift raw data often explodes the parts of the image with movement.

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