On Wednesday, March 5, 2014 10:00:48 AM UTC+5:30, Tduell wrote: > > Hello Kay, > > Sorry if I am a bit dense, but a couple of questions on detail, if I may. > > On Tue, 04 Mar 2014 21:19:46 +1100, kfj <[email protected] <javascript:>> > wrote: > > > - 'pin' the four corners of each image to the corresponding points on > > your skeleton drawing (the ladder) > > Where is this to be done, in Gimp or Hugin? > Can you be a bit more explicit as to what you mean by 'pin' an image to
another, it isn't a term I see used in Gimp or Hugin. > Okay, sorry for the sloppy terminology. By 'pinning' I mean setting control points between a reference image with reference points and corresponding points in partial images which need placement. Imagine, for example, having a set of image tiles and a reference image showing a grid. Pinning would then mean that you set CPs from the four corners of each tile to the grid points where the image is to be placed. Another use of pinning was my method of fixing prominent features in landscape panoramas to an artificial panorama which is used as reference, resulting in what I labeled a 'canonical' panorama with near-perfect horizon and orientation, see https://groups.google.com/forum/#!topic/hugin-ptx/l32L3Iffv6w > - use the ladder drawing as reference and optimize the other images for > > r, p, y, x, y and z. > > What is the ladder drawing in this context...the bare drawing, or the > drawing with all the images 'pinned'? > The ladder drawing, in this context, is the line drawing made in gimp which serves as the surface you 'pin' your individual images to. By 'reference' do you mean (in hugin terminology) the 'anchor' for > position? Yes, that's what I mean. You are right, anchor is the hugin term, or to be more precise, position anchor. And when you finally stitch the panorama, you simply deactivate this anchor image, resulting in a panorama from the individual photos, held by the invisible 'spine' of the hidden artificial anchor image. The 'pinning' technique has quite a few interesting applications, but I think it isn't used much, since it doesn't occur to many people to mix in images which don't visibly contribute to the final product. Another example of pinning is using a reference showing an azimuthal grid, possibly with the sun's position marked which can be found by using the techniques discussed here: https://groups.google.com/forum/#!topic/hugin-ptx/vWRO7SxdFxQ If your set of photographs show both the nadir and the sun, you are just a few clicks away from a level horizon and a good orientation. Kay -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/d89e7a12-826d-4872-9e6f-ffe151c94835%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
