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Thread: Closeup Stitch Example

  1. #11

    Re: Closeup Stitch Example

    Quote Originally Posted by Ed Richards View Post
    You really should try PTGui for this. It will save a lot of time and pain, and not use up all your computer resources.
    Thanks Ed, if I ever decide to do this seriously I'll give the demo a try.For now I'm going to stick with my view cameras.They are more pretty to look at


  2. #12

    Join Date
    Mar 2005
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    Re: Closeup Stitch Example

    That was my decision after messing with stitching digital shots. I do think that there are some special issues with macro work that make stitching digital an interesting alternative. Esp if you get a jig of some kind to position the camera. I like the idea of messing with DOF with stitching.

  3. #13

    Re: Closeup Stitch Example

    Quote Originally Posted by Chris Strobel View Post
    Huh?I'm not sure what you mean.I do know that I probably overlapped more than I needed.I didn't do this very scientifically, I just popped the camera on my Bogen 3047 head, started with the lens pointed straight at the center of the plant, then snapped 3 across x 4 down just moving the head around. I was about 2 feet from the plant{most of the bottom three snaps are cropped out here}One thing that happened was when stitching not everything lined up perfectly, and lots of micro cutting and pasting were needed.The master files canvas size is 20x30 inchs and chokes my computer (Athlon 4800+/2gb), is way bigger than I would ever care to print, took A LOT of time, and I missed my ground glass.So I'm gong to keep working with my 4x5 and 8x10. . . . . . .
    Good morning Chris,

    Sorry for the confusion. I was trying to equate capture area to film area/sensor area. The Canon 20D has a 15mm by 22.5mm capture area sensor size. So 12 images without overlap would give the dimensions I posted. However, with your non-scientific overlap, about all I could guess is smaller than 60mm by 67.5mm. In other words, your capture area was close to a frame of film from a 6x4.5 or maybe 6x6 medium format shot, if we guess overlap.

    It is not an important factor, just my curiousity. In case you wonder why I am curious about that, it is a way for me to quantify comparisons. According to DPReview and several other websites site, outright resolution (not file size) of the Canon 20D is in the range of 50 to 55 lp/mm. So your entire image would have that optical resolution limit across the frame. A single piece of film would require a lens/film/scanner combined resolution near that on a medium format camera to equal 50 to 55 lp/mm; not impossible, though tough to accomplish.

    I have seen some very nice prints from a friend of mine that has an interesting way of using his Nikon D2X. He stands and pans, then stitches the resulting frames. This is done handheld, and without a tripod. Even if the results could technically be better with using a tripod and carefully setting overlap, the images are still nice to view with the simpler method he uses.

    Ciao!

    Gordon Moat
    A G Studio

  4. #14

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    Hudson Valley, NY
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    1,455

    Re: Closeup Stitch Example

    Very nice image, Chris. If you were to stick with this, you would find the Photoshop time would decrease significantly with experience (there's alearning curve just like with most things photographic). For minor alignment issues the free transform tool (in skew, warp, or perspecitive mode) would eliminate the cutting and pasting that you did. Your results are quie impressive for a 1st timer.

  5. #15

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    Re: Closeup Stitch Example

    Quote Originally Posted by Gordon Moat View Post
    Sorry for the confusion. I was trying to equate capture area to film area/sensor area. The Canon 20D has a 15mm by 22.5mm capture area sensor size. So 12 images without overlap would give the dimensions I posted. However, with your non-scientific overlap, about all I could guess is smaller than 60mm by 67.5mm. In other words, your capture area was close to a frame of film from a 6x4.5 or maybe 6x6 medium format shot, if we guess overlap.
    Hey Gordon,

    The overlap is necessary to ensure there would be no gaps in stitching and it also provides a safety margin for local corrections. Typically, it should be somewhere in the 20% to 30% area. With the proper rig, such as paralax-correcting tripod pano head, that could be reduced down to maybe 10%, but not everybody has them.

    Quote Originally Posted by Gordon Moat View Post
    I have seen some very nice prints from a friend of mine that has an interesting way of using his Nikon D2X. He stands and pans, then stitches the resulting frames. This is done handheld, and without a tripod. Even if the results could technically be better with using a tripod and carefully setting overlap, the images are still nice to view with the simpler method he uses.
    I took these two panoramas using a Canon digital P&S as a quick note for the future LF shoot when the time and wheather allows. It was all done completely handheld, as JPGs (so not nearly as many post capabilities as with RAW), auto evertything and then stitched manually in CS2. The important thing is to keep it as steady and level as you can, so you want to plant your feet, extend your arms and do not change anything between the shots except rotate your torso around your hips. Of course, center your stance to the middle of the future panorama and start at one end and move sequentially to the other. It's not all that hard for quick takes, but if you want more precise and predictable results with lest post processing, a good, stable setup helps a lot, as well as good planning.


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