Re: [Gimp-user] Stitching Photos

[Dave Stevens <geek uniserve com>]

On Thu, 4 May 2017 14:14:34 -0400
Steve Kinney <admin pilobilus net> wrote:

> On 05/03/2017 10:11 PM, DERoss wrote:
> > I have two JPEG files, each with a photo.  I want to creat a single
> > file that has the photos stitched together side-by-side.  While I
> > know how to export an image from GIMP into a JPEG file, I cannot
> > figure out how to stitch two images together.  How do I do this?
> > Better, where in the user documentation is this described?  

use hugin, it's specifically for this purpose.

d

> There are automated tools to facilitate this, but I have not used
> them.
>
> The manual process is not terribly complicated.
>
> First, open one of the photos in the GIMP, then import the second
> photo as a layer.  Drag and drop the second image to the image
> canvas, quick & easy.
>
> Next, do Image > Canvas size, and make the 'workspace' available big
> enough to accommodate both photos side by side, with some room left
> over to move them around.
>
> Then align the photos so their edges fit together accurately.  How to
> do this depends on the individual photos; some rotation and scaling
> (in that order) of the layer you are moving around may be required to
> make them match, and maybe a little tweaking with the Perspective
> tool, which enables one to arbitrarily stretch a layer by
> repositioning its corners.
>
> Note that when using the Rotate tool, you can move the center of
> rotation by dragging the cross hair icon in the middle of the grid to
> wherever you want it.  Making one detail near the top or bottom edge
> of your upper layer match the lower one exactly, and putting the
> center of rotation there, will save a lot of time and effort.
>
> Adjusting the transparency of the upper layer to about 50% will
> greatly assist in lining it up with the base layer.  When your
> alignment, rotation, scaling etc. are
>
> Once the two photos / layers are aligned and look right, "save" your
> work as XCF, then save it again with a new name, i.e. add "-1" or
> something to the name.  This is so you can go back and tweak your
> first effort if and as needed.
>
> To make a seamless transition from one image to another, it may be
> helpful to add a layer mask to the upper image and use a very soft
> edged brush (or the gradient tool) on the mask to fade the edge of
> the upper image out a little.
>
> Finally, crop the aligned photos to square up their edges, make any
> necessary color, light, etc. adjustments, save that result as XCF and
> export the image to your format of choice as a finished product.
>
> Functions you may want to look up, if any are unfamiliar:  The Move
> tool, Scale tool, Rotate tool, Perspective tool, layer opacity
> adjustment, Crop tool.
>
> I have made panoramas this way, and it worked out quite nicely.  I
> cheated, though, by taking the original pictures with a camera on a
> tripod, which make the assembly /way/ easier than hand held results
> permit.
>
> :o)
>
>
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