01af Posted January 24, 2014 Share #21 Posted January 24, 2014 Advertisement (gone after registration) It most definitely is not moiré but an artifact of the remapping of a defective pixel column ... umm, four columns, actually. In Photoshop at high magnification (like, 400 % view or higher) the defect looks as if it was three pixels wide—but in fact it's exactly one pixel wide. Carefully picking the offending pixel column using Photoshop's Single Column Marquee Tool, followed by a Content-Aware Fill, perfectly will take care of the artifacts—at least in the areas where the sand dune ripples are. In the middle and upper parts of the frame, the Fill operation should be disabled (by clipping the single-column selection or via a layer mask) because there it will do more harm than good. Link to post Share on other sites More sharing options...
Advertisement Posted January 24, 2014 Posted January 24, 2014 Hi 01af, Take a look here Interesting pattern from M9 sensor. I'm sure you'll find what you were looking for!
jmahto Posted January 26, 2014 Author Share #22 Posted January 26, 2014 Thanks for checking the DNG out. I went back and checked other dune pics and it does appear in same part of the sensor. I also checked in my past pictures but could not find any pattern. I guess it requires a regular fine grain pattern (like ripples) to show up. Anyway thanks a lot for checking it out and suggesting the fix. I bought this camera used therefore not aware of any remapping done earlier. Link to post Share on other sites More sharing options...
jmahto Posted January 26, 2014 Author Share #23 Posted January 26, 2014 It's a very nice photograph. I wonder if the line might be created by a pixel column defect repair (where the whole line is remapped, not just the recalcitrant pixel) though I guess it might just be a weird moire effect (there are plenty of other more normal looking moire artefacts). The other pics in the series are on my flickr page (just started putting it up). I mainly shot with M9+28 cron and used NEX6 + 50 lux as secondary. Death Valley is my favorite place. BTW, I came across one film Leica shooter while on the trip (his pic is in the set). Death Valley 2013 - a set on Flickr Link to post Share on other sites More sharing options...
brill64 Posted January 27, 2014 Share #24 Posted January 27, 2014 I thought moire created blocks of pattern & colour & think this is more likely to be hardware related also. Link to post Share on other sites More sharing options...
theno23 Posted January 31, 2014 Share #25 Posted January 31, 2014 I've seen this same problem with my M9 exactly once. It was on a photo with diagonal power lines cutting across the frame. I did post a crop of the image onto a Leica forum at the time (can't remember which one, it was years ago). I've not seen it since though, I suspect it's a bug in the software that handles mapped out columns. It's certainly not easy to reproduce. Link to post Share on other sites More sharing options...
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