Commons talk:Featured picture candidates

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FPC etiquette regarding overwiting[edit]

How are things usually done at FPC regarding a non-author editing the file under consideration? If I am able to ameliorate the CA for a file under consideration at FPC, and there is little prospect of the uploader fixing it themselves before the nomination runs out (they seem to have appeared, uploaded and nommed the file, and disappeared), is overwriting the file a done thing? Does this change if the CA was the stated reason that I declined to support, and can I then immediately support? Does the answer change if I know of no way to fix the CA on a JPG without slightly degrading the edge colors (I'm using 4 separate filters to try to do this in the least worst way possible, but still)? FWIW I would have no problem with COM:OVERWRITE in this case, my question is only regarding FPC etiquette itself. Storkk (talk) 10:59, 19 June 2018 (UTC)

It does vary a bit. You want to avoid upsetting the author/nominator and also disrupting the nom if there are already votes or some reviewers might not think your fix helped. Most times a suggestion is made and we expect the author to fix it (and this depends on knowing a bit about the abilities of the author). You are right that just uploading over the top of someone's nominated image is considered rude. Sometimes people here will post a link to a dropbox version with the changes they think help, and perhaps notes about what they did. In the nomination for File:Dassault-Dornier Alpha Jets - Duxford Air Festival 2018 - 2.jpg, The Photographer thought it was a bit noisy in the sky and uploaded a fix and then immediately self-reverted himself. I decided his fix was better than I could do myself so reverted it back. Sometimes people will upload a fix but leave a comment that the nominator is welcome to revert it if they don't like it. You could do any of these and ask fellow reviewers/nominator to judge if it is better. Have you tried leaving the nominator a message on their talk, or emailing them?
Another option is to consider whether the issue you found is really worth fixing. Are you referring to File:Stercoraire iceland.jpg? That's a 43MP image and if you are examining it on a 100dpi monitor then it is 2 metres wide and 1.3 metres tall. So I hope you stand back a bit before judging if you still see the CA. One technique some try is to look at a downsized version such as 6 MP (which is good enough to print A4 high quality) and see if it is still a problem. I'm a bit confused that that image is 43MP when the camera is only 24MP and there's no evidence it was stitched. Downsized to 24MP it looks a whole lot better, so perhaps that's the size it should be.
If an image requires a fair bit of rework, then sometimes it is re-nominated after the fix. If the nomination has been around a week then uploading a fixed version might not attract enough attention (even if you ping existing reviewers). And if there are other problems with the image, then your fix may not be enough to make people reconsider.
What software are you using to fix the image? You want to be careful to preserve the EXIF and embedded colour profile, and some software and some settings will lose that. -- Colin (talk) 08:34, 21 June 2018 (UTC)
Thanks for your reply, Colin. I think I'll take the safest route and upload it either as a separate file if the nomination succeeds, or overwrite if it fails. While the question was of course motivated by a specific example, my question was about the procedures here, not that example specifically. I'll abstain on File:Stercoraire iceland.jpg where I see CA especially on the grasses on the right of the eggs, even at 1,280 × 853 pixels, though perhaps that's just because I know it's there. It's quite strong in the 6MP version you linked... I understand that different voters will have different requirements for supporting, and can certainly understand those who don't find that amount of CA disturbing (or indeed <1° camera tilts, or small stitching errors, slight jpeg artifacts...), even if I don't agree with them. Storkk (talk) 12:35, 21 June 2018 (UTC)
I usually just overwrite an image if I see that it is jpeg straight out of camera with clear flaws (eg File:Stranded mules during the Uttarakhand Floods of 2013 as encountered by People for Animals during a rescue operation.jpg which I noticed on QIC), or link to an alternate (such as File:Trougnouf's sandbox.jpg) that the author is free to use otherwise. If the author seems skilled enough to do it themselves but long inactive or if the change is rather subjective I'll overwrite and add a comment along the lines of feel free to revert. That's not a guideline but I don't believe I've upset anyone thus far. Most of the time this doesn't apply on QIC/FPC as it's best to teach people the ways. --Trougnouf (talk) 21:01, 25 June 2018 (UTC)