This is exactly what I did in the second take, as I have already explained. That took too much to process just to calculate the initial cage, that cage vanished unexpectedly, and was a pain to adjust, probably due to the big image. Also, not being possible to persist the cage info makes it a bigger pain.
Hence, I'd like to have some cage tool in Hugin, to have it saved in the project, especially that it was said here that are already altered versions of the GIMP cage used to morph or, as you prefer to name it, reshape the source images. On Thursday, August 8, 2019 at 11:33:07 AM UTC+3, Bob Bright wrote: > > On 2019-08-07 10:38 p.m., Mihai Dobrescu wrote: > > Hi all, I have tried GIMP cage. Not successful. > First, I've tried 8 points, one per corner, one per side middle. Does not > do as expected, somehow the image was twisted and swirled. > I've tried to add many, like following the irregular shape with a lasso > tool. That was absolutely odd. > Took many minutes, on my old i7, about a quarted of an hour, just to > calculate something after closing the cage. > Then each move took another painful time. An to be absolutely > discouraging, out of the blue, the cage disappeared and the image got back > to the original shape. > Don't get what happened, as long as I've used the mouse only. Weird. > > I think this might do, eventually, but it does not have the advantage of > working with some light preview, like ACR and Hugin. > A tool like this should be added for such processing. > > Just my thoughts... > > Regards, > Mike > > > What you need to understand about the cage tool is that when you move one > of the points in the cage, the other ones function as anchors to limit the > amount of distortion in their neighbourhood. You don't have to set that > many points, but if you don't set them in appropriate locations, you'll get > bizarre and unacceptable distortions in the rest of your image. > > In the case of the partial crop you posted earlier, if you want to > preserve most of the image but expand the corners to fill the full > rectangle, you need to set at least 9 points, one at each of the vertices > in your original image, like so: > > I've set a 10th point on the left side of the image, for reasons I'll > explain in a moment. Placement of these points doesn't have to be super > accurate, just try to get them close to the vertices. > > Once you've set all your points and closed the cage, you can start > dragging points around to fill in the corners. You'll want to drag point #9 > down, e.g., to fill the bottom left corner. When you do this, points #8 and > #10 will act as anchors to prevent the distortion from propagating too far. > (There's still going to be some distortion in the rest of the image -- > there has to be, because we don't want abrupt transitions -- but the > anchors will keep it within acceptable limits.) > > When you're satisfied with the bottom left corner, move on to the other > corners in turn, dragging #1 up, #4 up, and #6 down and to the right. > You'll also want to drag #10 in a bit, because moving #1 and #9 up and down > respectively moves some of the detail on the left side of the image out of > the frame. When you do this you'll have to go back and fine tune the > placement of #1 and #9 again. Similarly for #5 and #4 & #6. > > Here's what the result of your efforts should look like: > > Once you catch on to it, the whole process shouldn't take more than about > five minutes, even on a relatively slow machine. When you're satisfied with > the result, press the <Enter> key to commit the transformation, and you're > ready to move on to color correction, sharpening, etc. > > Cheers, > BBB > -- > > Bob Bright > Vancouver Island Digital Imaging > +1 250 857 9887 > [email protected] <javascript:> > -- 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/c69de90e-c7b3-4c96-85b4-2aece6dfac82%40googlegroups.com.
