Wikipedia talk:Graphics tutorials
Help with Photoshop and PNGs
From village pump 7 September 2003
Wondering if some helpful party could aid me in resolving a problem I have - I assume it's with Adobe Photoshop, which I use in making PNGs for use here on Wikipedia. They always turn out much, much darker than they appear in the program. Check the history of Image:mtl-metro-map.png - to create an acceptable image I finally had to bombastically lighten the original image in Photoshop. This happens whether I save it in RGB mode or indexed colour mode. Is there a way to ensure that the colours in the file are the same as the colours I see when using the program? - Montréalais 20:10, 28 Aug 2003 (UTC)
- is it only PNGs? P-shop has its own gamma correction -- check that. -- Tarquin 20:21, 28 Aug 2003 (UTC)
- Montrealais: what browser are you using? Some have broken gamma correction in their display engines. --Brion 21:35, 28 Aug 2003 (UTC)
- IE 5.5. Does the image look too light on some other browser? And (at least out of the formats I use) it's only PNGs as far as I know - all the GIFs I created for my website look fine. - Montréalais 23:44, 28 Aug 2003 (UTC)
- The first three versions are too dark, the last two are fine (I use IE 6). The only parts that could be even lighter (not the whole thing) are the small words to the right to the blue signs with white rectangles and an up-arrows in them. Like the lower-left one that says: "TRAIN DE BRAMIUE MONTRÉAL DELSON"(?) --Menchi 23:56, Aug 28, 2003 (UTC)
- Try fiddling with the color settings in Photoshop. On my Mac at work w/ ps 7 I loaded the (older version) of the file, saw it looked fine, went into the Color Settings (in the apple menu on Mac OS X; probably under File on Windows) and switched the 'Working Spaces' / 'RGB' to 'ColorSync RGB - Generic RGB Profile', and resaved. The resaved file looks great in Safari and Mozilla, at least for me... but I don't know how reliable this is. --Brion
- I noticed a problem with photoshop's png module also -- depending on how its displayed, it can even be chopped to bits (AcDsee) - with browsers, the transparency quality is inferior to that of the Gimp. Maybe try something like this (I havent tried it yet) http://www.freephotoshop.com/html/png.html -戴眩sv 00:22, Aug 29, 2003 (UTC)
- I'll experiment with that later. Thanks so much for the help, folks :) - Montréalais 04:33, 29 Aug 2003 (UTC)
I have since discovered that if I save the image from Photoshop as a .gif, I can use Thumbnails Plus 4 to convert it into .png with correct colours. - Montréalais 09:45, 8 Dec 2003 (UTC)
Transparent Background
Does anyone know how to make the background of this File:Http://en.wikipedia.org/wiki/Image:S28 250-smallversionformainpage.jpg transparent so it won't look like heck on the Main Page? jengod 22:51, Feb 23, 2004 (UTC)
I don't know if jpegs can have transparent backgrounds. Resave as a .png and set the tranparent colour as white. (I'll do it for you if you have trouuble)theresa knott 00:36, 24 Feb 2004 (UTC)
- Sadly, I don't know how to do that on the free version of VicMan's Photo Editor. >g< jengod 00:41, Feb 24, 2004 (UTC)
To turn a solid background colour transparent using free GIMP editor use the option Filters > Colors > Color to Alpha and specify the colour to be removed. For more detail (including adding a different background) see: http://www.gimp.org/tutorials/Changing_Background_Color_1/
Should these be moved to wikibooks?
Should these all be moved to a single wikibook? - Omegatron 20:46, Apr 8, 2005 (UTC)