On 12 Dez., 14:31, Matthew Gates <matthew...@gmail.com> wrote: > Hi, > > I have data for a full sky astronomical catalog which is comprised or > a large number of 256x256 jpeg images. > > There is about 50 gig of data in total, at multiple resolutions. > > I don't want to make a panorama, but I do want to modify the image > tiles so that blend together more smoothly than they currently do. > > Can hugin and/or related tools help with this?
I supoose so. It seems to me that you should be able to warp the individual images with nona so that they all fit together nicely. If you want them all to fit together - so that they could theoretically be stitched into a panorama - you have to first make up your mind what projection to use. I think popular choices for the whole sky are stereographic and fisheye projection. Do you have stellarium? http://www.stellarium.org (You may not even want to use your astronomical catalog once you have it ;-) - there you can have a look at different projections and pick one you like. Then you'd have to position the images in the output space. Since they are astronomic images, I suppose you'll have declination, rectascension and field of view for each of them. A bit of a dicey issue is lens distortion, though - if your images are photographs after all. You can only work that one out if you have reference images for every used resolution. Then you try and match as many stars on the reference with stars on an image - preferably in a well-poulated area of the sky, on evenly distributed stars, and optimize for v, a, b and c. You can create these reference images with stellarium by doing screen shots when you have the area in question in view. See also http://www.johnhpanos.com/starcal.htm One problem remains, and that is that you can't map a spherical surface (the sky) to the plane without intoducing distortions somewhere. So if you want all the tiles to fit smoothly, some of them will be so warped you won't recognize anything on them (just look at an equirect's poles). So maybe you'd be better off picking sizeable, but not too big patches of the sky (like, 15 by 15 degrees) and making the images inside these patches fit nicely, but leave it at that. with regards Kay -- You received this message because you are subscribed to the Google Groups "Hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
