Let me take a crack at this old thread, which I think is very on-topic for Hugin etc.
So, can/should someone wanting to align rephotographs use Hugin? Of course what I want is to register my new photos to the old ones (i.e. stretch the new pixels so they will align to the old image and lie right on top of it). That's almost exactly what Hugin does, and Hugin even finds "control points" (i.e. spots where the two images match) automatically-- but it seems Hugin is made to assume, say, a 10% overlap instead of a 90% overlap. In other words, stitching is a form of registration. But when I try this in Hugin I get bizarre results. Are there instructions for this that I have overlooked? Or could the program be slightly modified to make this more convenient? Or would that just duplicate some other program that I have likewise overlooked? For now I use QGIS (a cartography program) to align new to old the way you'd align, say, a satellite image to a map. But of course it's so slow picking points manually. It might literally take ten or a hundred times as long. By the way (I'll say though this might be obvious) when you do a simple alignment in something like QGIS (say, a first-degree polynomial transform) the "error" arrows (showing where the computer moved your control points to) often show you whether your camera was too far left or right, and even too close or far away. E.g. if I reshoot a hill in front of a mountain and the computer "wants" to pull the foreground hill to the right to align with the mountain, then my camera was too far to the right. If the computer "wants" to pull the hill down then I was too close. That's an old form of "computational rephotography." Really, I'm surprised that by 2019 there's not some program that lets me drag an image onto a similar image and shhp! it aligns to the old. Or have I missed that too? I hope this is a constructive question. Thanks. -- 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/e6e2b7f7-81f1-4f79-897a-01c8401ec157%40googlegroups.com.
