On Wed, 3 Jun 2009 13:45:08 -0600, LuKreme <[email protected]> wrote: > OK, I'm stumped. Brought in three pictures, let it set control points. > Now, how dod i get the blended image out so I can do something with > it? I can do Optimizer, but when it's done I don't have a new image > and Exposure just gives me an error there are no overlapping control > points?
You blending exposures from a stack of images, or trying to stitch a pano? I rarely (well, basically never) use the Hugin GUI - if I want that, I use PTGUI, which is a close cousin. I use Hugin to get at all the neat command line apps that are its heart and soul (and which are, mostly, highly dependent on shared code, so generally difficult to build standalone). So you understand the basic concepts... First, control points are created (by a sift-based tool). This identifies common features in 2 or more images. Then the control points are used by an optimizer to figure out the best fit - how to assign (or tweak) the Yaw/Pitch/Roll of each image, and the lens values (FOV, shift, and distortion coefficients), so that all the images fit together snugly, based on the best fit of the control points on an imaginary sphere (where the center of the sphere is the rear entrance pupil, aka nodal point, of the lens). This is neat because with a good set of images, you end up deriving an accurate model of the lens itself. Next, the source images are fed through a stitcher (nona), which remaps them and moves them into place on that imaginary sphere. Then, the images are fed to a seam blender (enblend), which eliminates the seams between overlapping images (usually caused by slight exposure variations between the center and edges) and does its best to deal with subject matter that has moved (clouds, leaves) and minor parallax errors. For non-panoramic image sets you usually skip this step. Finally, if there were overlapping images with different exposures, then you can also feed the stacks to an HDR process - whether a true hdr merger, or something like enfuse which is really more of an automatic exposure masking tool. Ok... that out of the way... if you're just trying to use Hugin to exposure blend images, you'd first generate control points. Then run the optimizer. Then in the Stitcher panel, output checking the 'Blended Panorama "enfuse"' using nona, enfuse, and enblend Also, if you check the "Remapped images" button you'll get the aligned (remapped) images individually as well, prior to exposure (and seam) blending in case you want to feed them to another tool for blending. _______________________________________________ OSX-Nutters mailing list | [email protected] http://lists.tit-wank.com/mailman/listinfo/osx-nutters List hosted at http://cat5.org/
