Focal plane shutters are really designed for a more rapid exposure. What is needed is probably more like a photo finish camera: http://en.wikipedia.org/wiki/Photo_finish Which looks to be very similar tho the line camera Kay has described (pretty similar idea.) That PanoScan is cool (much like certain film panoramic cameras of the past, only digital.) But I'm thinking one could do this with standard equipment we all already own.
I was just thinking one could use a conventional camera that can record 1080p movies. In the portrait mode with a wide angle lens (as appropriate) and probably an improvised steady cam (just a balanced mount to create some inertia and dampen vibration and movement) one could just drive (or carefully walk) down the street taking a movie. A camera mounted on a bike, trike or a wheelchair seems like it might be useful. One could walk it down a chalk line. Using scripts, one could then appropriately select from the frames (make sure blurred frames are marked or tossed) and crop them down to the center strip. One could retain a middle strip (5-20%) of each image (a smaller percentage if using all frames, a larger percentage or whole image if using only a subsample of all frames. The lens correction would be static so PanoTools could be applied to remap each of the selected images and stitch them into manageable sozed rectilinear images. Viola! — a giant linear panorama. Maybe not a viable solution for Syv since he might be on a schedule. ;-) But with so many houses, it might be worth doing the work up front to save time in the long run. But my intention for Syv was that he could this capture method, if appropriate, as an image collection device and just hand select frame grabs — directly in front of each house, each corner of each house, one or two images between each house, etc. Something like every 30th or 60th frame. This would allow him to lose the tripod and save many hours in capturing images, so long as he doesn't mid losing some resolution and increasing post processing work. Anyone interested in working to making this happen? It seems very possible to me. --John On Nov 17, 1:00 pm, Robert Krawitz <[email protected]> wrote: > On Thu, 17 Nov 2011 09:29:23 -0800 (PST), kfj wrote: > > > On 16 Nov., 09:25, JohnPW <[email protected]> wrote: > >> Ha! Just as I expected someone with a good knowledge of the subject > >> has responded as I wrote this. > >> ... > >> But I really think using a camera that can > >> take movies might be a good way to go (see below.) The idea being, the > >> more images you capture, the less of each one you use. Ideally you > >> would only end up using the very center most part of each image. Being > >> handy with scripting would help a lot here (I am definitely not!) > > > This is really the idea of the line camera: > > >http://en.wikipedia.org/wiki/Rotating_line_camera > > > Just a wild idea here: if I'm not mistaken, there are shutters which > > are made of a black piece of material with a slit, and the material is > > moved so that the slit moves over the sensor - okay, I checked myself, > > they are called focal plain shutters: > > >http://en.wikipedia.org/wiki/Focal_plane_shutter > > Almost all modern consumer and prosumer level cameras (and all of the > mainstream SLR systems) use focal plane shutters. The alternative is > a leaf shutter, which needs to be built into the lens. That was > common on rangefinder cameras, and many medium format and all large > format cameras use leaf shutters in the lens. > > > now if you'd use such a device in a moving camera so that the slit was > > small, but the exposure was long (I'm not sure this can be done with > > these shutter as they come) you might end up with an image similar to > > what you'd get from a line camera. You might have to rotate the camera > > at the same time, or you might use a special lens that only shows a > > vertical strip anyway (cylindrical, I'd imagine?). > > You can't do that with any focal plane shutter I'm aware of. The > curtains of the shutter move at a fixed (fast) speed. Sometimes you > can see the effect of the moving shutter, e. g. when photographing a > propeller-driven aircraft. -- 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/hugin-ptx
