Written by Ctein, TOP Technical Editor
(Author's note: Please read the already-posted responses before commenting. Thanks!)
I am mining the group-mind that is the all-knowing TOP readership.
If you're using a camera that lacks an anti-aliasing filter and if you've had to deal with aliasing in any of your photographs, how did you deal with it?
(Okay, I mean aside from deleting the photograph.)
You've got this photograph you really like. It's exhibiting annoying aliasing. How did you fix it in Photoshop or whatever?
This question comes out of a conversation I had with Richard Anderson a few days ago. I was explaining to him why I was leery of any of the new non-anti-aliased cameras because I'd already had enough problems with aliasing in my photographs from working with them in the past. (If you've never had such problems, I'm happy for you, but that's not relevant to me.)
He thought there were Photoshop techniques for fixing this. I didn't know of any, and we couldn't find them with Google or Adobe Help searches (unfortunately "aliasing" has a strong attractor having to do with rendering type and vector drawings).
I turn to you. Are there post-capture techniques for fixing this? If so, it could change my mind about considering such a camera in the future.
Tips on printing
Totally different subject (well, not entirely): Pascal Jappy in France just posted a very nice interview he did with me by phone about printing. It even contains a useful tip or two that I haven't written about before that may be helpful to folks who've been unsatisfied with the quality of their digital prints. Check it out.
Ctein, TOP Technical Editor
UPDATE, Monday: Well, that got resolved faster than I expected!
A couple of points of note: it's hard to get the answer to a question if you don't know how to ask it. “Alias” as a search term is a big fail. “Moiré” works great. But if you (like me) think in terms of the former rather than the latter, it's a stumper.
(Not the first time I've encountered that problem. I still haven't mastered writing macros in Excel because Visual Basic uses such a radically different vocabulary that I can't even figure out how to phrase some questions. Instead of being able to search for specific points that stymie me, I'm forced to read whole chapters of books in the hopes that the information I need will fall out.)
Something else—the moiré adjustment brush setting isn't available before Process Version 2012. The files I was looking at with this problem predated that. They opened up with PV2010 as their default in ACR. No moiré adjustment! It's a good argument for converting to PV2012 on raw files that haven't been massaged into their final form. There'll be tools you didn't even know existed. (Important note: don't do this if you've got a raw conversion in pretty much final form, because there are no exact equivalencies between a lot of the functions in PV2010 and PV2012. The latter is superior, but it's different.)
As for the moiré tool itself, I'm lukewarm. In the real world (as opposed to studio) subjects where I see the problem, it's in areas where there's lots of fine detail of high contrast. When the tool is applied to those areas, it fixes the aliasing, but it also wipes out saturation and flattens out the color overall within the brush radius. Sometimes this isn't a problem; other times it's a big one. I know, I'm preternaturally sensitive to color. Well, that's who I am. For me this is a half-fix.
Still, that's an improvement. It only leaves me half-leery of these cameras instead of totally leery.
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