Hi, thank you everybody for not giving up on me and for the detailed descriptions.
My idea is GIMP cage is not the thing I need, generally speaking your description suits better my needs, because moving some point should have impact along all the image. I've wrote several times that I have used a word, but colloquially speaking rather than accurate, still a morph need, probably. If you don't know the word, let find one... Still, it is impossible to have a panorama stitching without distorting the images to align the control points... I don't see ACR altering only one image of the composed panorama either. It is done on the whole result, my feeling being it does similar to a lens too. Why not Hugin do some similar process...? At least in theory. Anyway, I see the same developer contributing to Hugin and to Panotools as was indicated before. Why not integrate that in Hugin? Doesn't Hugin use Panotools? Regards, Mike On Friday, August 9, 2019 at 2:39:53 PM UTC+3, Frederic Da Vitoria wrote: > > Hello Mihai, > > There is a huge difference between what Hugin does and what the cage tool > does. > > As you can see, the cage tool affects only a part of the image, and it > does so by stretching/compressing, but not the whole image. > Furthermore, the cage tool does this just according to the > instructions you gave him. You can ask for a stretch vettically and a > compression horizontally. In other words, this is true morphing, > something which could be used for example to give the illusion that > someone sad is smiling. The assumption here is that the scene is not > perfect and should be artificially improved. > > Hugin does something completely different. As far as I know, it always > works on whole images. It applies complex formulas which work > radially, that is all the points at a certain distance of the center > of the image will be affected the same way. In a way, Hugin works like > an optical lens. > > Furthermore, Hugin applies the same transformation to all images (this > is not always true, but generally it is so). And all tranformations > are done to the images before merging them into a panorama. A > consequence of this is that if you move a point, this will affect the > transformation of all images: Hugin will try to find the > transformation which once applied to all images will give the best > results. Often improving the matching on one point will make other > points worse (especially when shooting without a panoramic head) > > Hugin does not morph the images, it does not distort them in the way > of a morphing tool does. Hugin supposes the images are perfect and > just need some kind of geometric adjustment in order to make them fit > together. > > This explains why Hugin gives much worse results if you dont use a > panoramic head: your pictures have parallax errors, which could maybe > be corrected through image-specific morphing, but Hugin does not do > morphing. > > BTW, but very important: I don't know the correct word for what Hugin > does. But it definitely is not morphing. > > 2019-08-09 12:51 UTC+02:00, Mihai Dobrescu <[email protected] > <javascript:>>: > > ... and to be clear for me... > > Doesn't Hugin, through Panotools, detect control points to align the > > images, but those control points are not in the same positions in > relation > > one to another in those source images, hence distorting them in order to > > create a meaningful panorama image/projection? > > How is this called? Distorsion, morphing, reshaping...? > > -- > Frederic Da Vitoria > (davitof) > > Membre de l'April - « promouvoir et défendre le logiciel libre » - > http://www.april.org > -- 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/2269da4a-dbd4-4fd4-83df-3e98e024f829%40googlegroups.com.
