Hello, I am revisiting this and my problem of understanding how to work with Hugin persists.
What I need is warping (boundary warping as is it called in Photoshop and possibly MS ICE). Here is some reference: http://kaiminghe.com/sig13/index.html. I've read about warping related to Hugin, so I wonder if there's some technique of control points or other to achieve my goal. What can I do? What is warping in Hugin? Regards. On Friday, August 9, 2019 at 4:27:10 PM UTC+3 Mihai Dobrescu wrote: > ACR is an automation of PS process. > In PS, the images can be loaded in layers, the they are aligned and masks > are added. > The alignment distorts the images in a way that overlaps the control > points (which is trnsparent to the user). > It is done with a script that can be read, being delivered with PS and > looks improved by the users too. > Eventually, the user crops and distorts and flattens the image. > > On Friday, August 9, 2019 at 3:41:36 PM UTC+3, Frederic Da Vitoria wrote: > >> My guess is that the final step done by ACR uses a completely >> different code to do this. In other words. I think that ACR first >> assembles a panorama using the same methods as Hugin does, and when it >> has finished it checks if there are holes in the panorama and it uses >> a morphing algorithm to fill those holes. This is a good idea, but it >> is something completely different from what is already implemented in >> Hugin. This is a nice finishing touch, and maybe Hugin could try to do >> the same, but definitely the code to do this would be completely >> separate from the code Hugin currently uses to create a panorama. So >> adding this would be a major enhancement, not just a tweaking of some >> instructions in Hugin. In order to do this, someone who knows about >> morphing algorithms would have to create the code. >> >> 2019-08-09 13:59 UTC+02:00, Mihai Dobrescu <[email protected]>: >> > 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. >> >> >> > >> >> >> -- >> 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/1d60ee69-e7ab-46b7-811e-1c0e683931ecn%40googlegroups.com.
