Good Day,
New here and have a question. I want to create a photo backdrop for my model railway. It is an urban scene and I have taken a series of photos laterally across the potential area. I now need to 'stitch' them together to form a continuous photo I can get printed and use as the backdrop. My question...can I use GIMP to get this done? Looking forward to hearing from some replies. Doug _______________________________________________ gimp-user-list mailing list List address: [hidden email] List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list |
On 1/27/20 12:36 AM, Doug & Kathy Davies via gimp-user-list wrote:
> Good Day, > > New here and have a question. I want to create a photo backdrop for my > model railway. It is an urban scene and I have taken a series of photos > laterally across the potential area. I now need to 'stitch' them together > to form a continuous photo I can get printed and use as the backdrop. My > question...can I use GIMP to get this done? > > Looking forward to hearing from some replies. > _______________________________________________ gimp-user-list mailing list List address: [hidden email] List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list |
In reply to this post by Users mailing list
On Sun, 2020-01-26 at 15:36 -0800, Doug & Kathy Davies via gimp-user-
list wrote: > My > question...can I use GIMP to get this done? You may find hugin or another panorama stitcher is better at it. Hugin takes a little work to get used to, but can get good results. Then maybe use GIMP to clean up the result. There are four steps, whichever program you use: (1) combine all the images into one big image, e.g.one per layer (File- >open as layers in gimp) (2) correct for rotation and make obvious exposure corrections to the photos - this is especially necessary if the lighting, focus, or camera settings such as exposure time and aperture varied between shots at all; (3) determine known common points in each pair of pictures and move them to connect at these points, using perspective and barrel distort as needed (4) correct colour casts, darkness etc between separate parts of the joined-up image and crop away the uneven edges. Hugin will do step 3, which is the hardest part. The others, you can do in gimp. Liam (slave ankh) -- Liam Quin - web slave for https://www.fromoldbooks.org/ with fabulous vintage art and fascinating texts to read. Click here to have the slave beaten. _______________________________________________ gimp-user-list mailing list List address: [hidden email] List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list |
Doug asks:
> > I have taken a series of photos > > laterally across the potential area. I now need to 'stitch' them together Liam R E Quin writes: > There are four steps, whichever program you use: > (1) combine all the images into one big image, e.g.one per layer (File- > >open as layers in gimp) > (2) correct for rotation and make obvious exposure corrections to the > photos - this is especially necessary if the lighting, focus, or camera > settings such as exposure time and aperture varied between shots at > all; > (3) determine known common points in each pair of pictures and move > them to connect at these points, using perspective and barrel distort > as needed > (4) correct colour casts, darkness etc between separate parts of the > joined-up image and crop away the uneven edges. (5) If the edges still don't match perfectly, use layer masks with black/white gradients to fade out the edges of adjacent images so each image blends into the next. > Hugin will do step 3, which is the hardest part. > The others, you can do in gimp. Hugin can be hard to use and doesn't work on every collection of photos, but when it works, it does an amazing job on steps 3 and 4 both. Definitely try it. And Doug: when googling for more info on this technique, "panorama" is a helpful search keyword. You should find lots of tutorials and examples if you include that in your search. ...Akkana _______________________________________________ gimp-user-list mailing list List address: [hidden email] List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list |
In reply to this post by Users mailing list
I have used Hugin quite a bit (but by no means an expert),
and it does all 4 steps quite well, normally. (if any of the exposures is WAY different in light level, you might want to use GIMP on that one to bring it closer to the others.) Once it Aligns the photos, you can move the conglomeration around to straighten it, try a different projection, and then crop to what looks good. If things don't align as well as you like, you can add control points. I have even thrown it four photos that were actually a vertical panorama, and it figured it out and aligned perfectly on its own... >There are four steps, whichever program you use: >(1) combine all the images into one big image, e.g.one per layer (File- > ->open as layers in gimp) >(2) correct for rotation and make obvious exposure corrections to the >photos - this is especially necessary if the lighting, focus, or camera >settings such as exposure time and aperture varied between shots at >all; >(3) determine known common points in each pair of pictures and move >them to connect at these points, using perspective and barrel distort >as needed >(4) correct colour casts, darkness etc between separate parts of the >joined-up image and crop away the uneven edges. >Hugin will do step 3, which is the hardest part. >The others, you can do in gimp. > >Liam (slave ankh) _______________________________________________ gimp-user-list mailing list List address: [hidden email] List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list |
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