[ Date Index ] [ Thread Index ] [ <= Previous by date / thread ] [ Next by date / thread => ]
On 28/08/14 22:21, Adrian Midgley wrote:
Given two sets of JPEG image files - eg taken from two cameras at approximately the same times - identified either by being in different folders, or by having different filename prefixes ... Show the first and then subsequent ones one from each series, one on the left, one on the right (preferably of two screens if two screens are to be had, or at opposite sides of a single screen) advancing both together by default, but allowing each series to be nudged forward or back one. Does that exist? Would eog or some existing image viewer be amenable to wrapping up so as to do this with two instances being driven by a frame? For two read n by all means, but 3 is the highest number I've needed, ever.
I've seen exactly this on a workstation I used to look after back at KCH NHS.
n = 2x2 there, and the left/right or top/bottom pairs could be advanced or rewound frame by frame, interlocked (the images were in some super weird format, maybe DICOM?) The images were stereoscopic imaging of some kind, obviously not MRI, but the workstation was hooked up to basically an entire rooms worth of gear. The workstation in question was running a venerable version of pre-Solaris SunOS back then, and cost more than most people's cars. I never asked how much the actual imaging equipment was worth, but presumably orders of magnitude more.
This isn't particularly helpful as I don't remember much more detail after 10 odd years, but such a thing definitely *has* existed, even if it's effectively gone now. It was highly proprietary, I presume.
Your two best options are ask at nekochan.net - many, many old school SGI/Sun imaging gurus live there, and know almost everything about insanely high end equipment and graphics machines from back then. They'd probably know the name of the software I'm dimly recalling, probably because one of them wrote it. Quite possibly another is still maintaining it for Irix, Solaris and UNIX like systems. The second option is find a competent web designer: this is literally a few minutes work in most modern AJAX/web2.0/whatever frameworks. There are countless kitten/meme/screenshot comparison websites out there that do exactly this. Anime screenshot comparison websites particularly do this, for comparing (in super high resolution) individual frames from different encoding groups so that torrent communities can pore over every tiny detail before selecting the 'best' version for offering up to the archivers.
compare.bakashots.me (disclaimer - I might have had something to do with that particular site) is an example which is different in form but identical in purpose to what you want: there multiple identical frames are taken from two or more different sources and laid out for comparison. It's actually probably easier to differ between images by having them full screen and overlaid - you see one source normally on mouseover, and the other source when you mouseout. As an anime encoder and image quality obsessive, I spend a lot of time poring over exactly these sort of details and even on a 4k screen, I prefer this method to having both images laid out simultaneously side by side (which I used to do pre-4k on 2x 1080P monitors, side by side).
But anyway, just find a half decent web monkey. They could knock this out for you in less time than it took me to type this.
Regards -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq