>So I took this fabulous picture of a sunrise - only the picture on my >iPhone is better than what I got on my camera (which I REALLY need to >learn how to use!) and I want to have it enlarged on canvas to 48" >wide by 24" tall. The only problem is I can NOT get a good enough >quality image to have a decent end product. I am certain that somehow >someway this can be done, because a local photo shop basically >enhanced the original image in about 5 minutes just to show me it >could be done. I really want to do this myself so the whole process >is more cost-effective. > >The problem is that I have absolutely no CLUE how to use GIMP! I >downloaded it and even watched a tutorial, but editing functions are >grayed out and when I try to follow the tutorial my image doesn't look >anything like the step-by-step example. > >If 48x24 is not an option, I at least need to know realistically the >largest I can go and keep the integrity of the photo. Attached is the >image. > >I appreciate any help. Thanks!
Print size? 48"x 24" is a bit of a funny size. My print co. uses 24"x 20" or 30" x 20" for laser colour printing which might be better size. However, back to the question. First thing, Gimp is a raster editor and works in pixels which have little to do with physical size *until* you come to print. Then a property pixels-per-inch (ppi aka dpi) comes into play. The ppi to use for a poster size is not the same as a 6" x 4" photograph. Check this chart which gives advice for ppi vs. viewing distance. http://resources.printhandbook.com/pages/viewing-distance-dpi.php Quite a conservative value for a large poster size might be 150 ppi. Back to your photograph: I would possibly straight up the horizon first but for this example. The aspect ratio is not 48:24 (2:1) so the image needs to be cropped. That is a matter of preference but might look like this. https://i.imgur.com/PM20bUL.jpg Then scale the image to the required pixel size. Image -> Scale image. At 150 ppi the image size is 7200 x 3600 pix, but you can set units in Gimp like this. https://i.imgur.com/oP36GhJ.jpg Use NoHalo as the interpolation method. You get a warning about size but it is just a warning. Some operations will a little longer just be careful. Now is the time to tweak colours etc, but for a beginner that is a whole different question. The final operation is always sharpening (if required) I would use Filters -> Enhance -> Unsharp Mask and again the amount you use depends on preference. Too much looks very artificial. Small value like this. https://i.imgur.com/msg2H1F.jpg Then stand back to check. https://i.imgur.com/oHfExbT.jpg -- rich404 (via www.gimpusers.com/forums) _______________________________________________ gimp-user-list mailing list List address: gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
