[chupathingie]

Well, it is a beautiful sunset.

+1
(have another)

[chupathingie]

Note for anyone who wants to abuse their PC with this kind of crap: GraphicsMagick (which is an advanced port of ImageMagick) does in fact read and display very large image files. The default package however is only 8-bit/channel capable. To enable 16bit or 32bit/channel capabilities the software must be compiled from source code. You need both the file type libraries and the dev libraries for the image types you want to work with or your compiler will not include support for them (I had to go back and install the dev packages and re-compile). If you’re using Photoshop, you don’t need to worry, supposedly… I’ve not tested it (I’m a cheap bastard/Linux weenie), but comments I’ve seen indicate that PS supports gigapixel files.

Gigapixel images are, obviously, memory hogs. Simply displaying a 5GB TIFF ate up all 16GB of my RAM and another gig of swap. If you don’t need to view the actual file, as would be the case if you’re using an image server like you see on gigapixel websites, you don’t really need GraphicsMagick. ImageMagick can handle resizing, cropping, chopping, or whatever else you need to do to it from the command line.

I had an issue with my resized images (they needed to be small enough to display); they were not rendered correctly and I could not determine if the problem was with Hugin or ImageMagick without actually viewing the original full-rez file (which is why I needed to compile GraphicsMagick). I rendered reduced resolution files in Hugin without issue. My rendering issues appear to be from Hugin, but I’m running a 3-year-old version. I’m going to see about compiling the latest and try again.

edit: Sweet! No need to compile. If you’re running Ubuntu, use this:

sudo add-apt-repository ppa:hugin/hugin-builds
sudo apt-get update
sudo apt-get install hugin enblend panini

That gets you the latest stable build.

[chupathingie]

Thanks, folks… 🙂
Focus: auto on the ridgeline (essentially infinity), then turn it off and shoot at f16.

edit: I don’t think anything in the image is closer than 300 feet from me.

[chupathingie]

ok, might as well show off my mistakes… inaccurate camera aiming between shots, somehow I managed to get different exposure settings on the subs in the upper right, I boned my settings in enfuse and wound up with that god-awful halo where land meets sky and I neglected to clean my glass before the shoot (that one’s inexcusable). Once I saw my aim was off on 2 sets of subs I gave up trying to correct the image and just wanted to proof the process for a gigapixel image.

Larger here@90megapixels…biggest I could squeeze on flickr. Still a lot of detail, but only 7% of the original pixel count.

[chupathingie]

w00T! It worked! It took 10 hours, but I’ve got a pair of 5.3GB images and one high-bit-depth 10.6GB image.

Now I have an unexpected snag…nothing I have can read them. GIMP’s tiff plugin crashes, RawTherapee just ignores it… I may give Graphics Magick a try, they claim to be able to open and manipulate multiple-GB images.

[chupathingie]

taylorphoto.com offers gigantic prints mounted on rollable lexan for easy shipping.

THAT is an excellent piece of info, and sounds like a great solution for x-large prints. At the rez I’ve got, 150dpi works out to be like 11ft by 36ft, so more than enough rez for a wall-sized mural.

[chupathingie]

PC was still crunching when I left for work this morning, and it looks like the final pixel count is about 1.3gigapixels. Apparently Hugin’s has been updated to handle larger files without running out of RAM, as my memory usage is still hovering around 3gig… it used to climb rapidly at startup as it loaded up the images for stitching. I’ll reserve judgement til after it’s done.

Aaaannnndd… my FOV at 200mm is 10.5 degrees, with shots every 10 degrees. You see where this is going, right? I have 2 vertical disconnects in my image set. Dammit. 2 vertical black stripes in the preview where I didn’t set the cams position exactly right. I went ahead and ran the stitcher anyway, so I could at least proof being able to do such a large image. I gotta say, Hugin impresses me. I reduced 144 bracketed to 48 fused images in 48-bit color, then simply dumped all of them in one shot into Hugin. Aside from my acquisition errors, the alignment went completely without a hitch, even with 4 rows of 12 images. It sorted and aligned them without any manual intervention whatsoever. Final rez is about 65000×20000 after cropping.

[chupathingie]

Currently I’ve got 16gig of RAM, and I’ve combined and reduced my data down to just shy of 6gig. I don’t know how much overhead my stitcher needs, but I’m expecting (and dreading) getting into swap. I may get close to the gigapixel mark on this one, depending on how much overlap I have between rows. As far as the mechanics of printing something that large goes, it would have to be done in strips. The widest roll of print paper I’ve seen in the local print shops is 36″.

[chupathingie]

Wow, nice shots (and ain’t free film&processing great?)! I loved going to Glen Rose in the heat of the summer… so many places to just flop into the river on the hike thru the park 🙂

[chupathingie]

Wow, I take off on vacation for a few days and you guys get all famous on me! 😆

Well done, folks, and congrats! 🙂

[chupathingie]

*applause* Yeah, the linked one is very nice! I like the one with the plane transit, too…

[chupathingie]

/random, similar topic, don’t feel like searching right now: Anyone know of a motorized GEM for a standard (3/8-18 ) or half-inch tripod that’ll mount directly to an slr?

Tough one there…are you looking for an actual GEM or just something that tracks? A full-blown GEM is actually cheaper than something like an astrotrac after you figure in the pair of heads you need to make it manageable. All you really need in addition to a standard GEM is a mount plate with your screw of choice poked thru it. I actually had my camera attached to my mount with a lighting clamp for a couple years; it doesn’t have be level or square, just rigid. The polar alignment takes care of pointing regardless of the angle of the camera relative to the mount.

Some of the threads here might help you cut to the chase.

[chupathingie]

I was toying with the idea of driving out to Albuquerque myself, as it’s only 4 hours away and one of my best friends from high school lives there. I suppose I should give him a ring soon. The only catch for me would be that the eclipse happens late in the day and I’d likely get home after 1-2AM just to have to get up for work on Monday.

[chupathingie]

I don’t see me giving up on Raw Therapee either, there are just too many conveniences packed in there. Batching, copying/pasting profiles, and even their levels panel; which is very different from GIMP/PS but still very useful.

[chupathingie]

Apparently you have to compile from source to get the high-bitdepth functions for now, but I haven’t had time to breathe lately much less fiddle with software to find out first hand. It’s really going to be nice to have an alpha slider in high color depth… RawTherapee is nice, but I miss having photoshop-esque levels tools.

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