Merging/combining identical digital photos?

Discussion in 'Photography' started by Hmmm..., Oct 31, 2003.

  1. Hmmm...

    Hmmm... Guest

    Say I have several, slightly different, digital photographs of the same
    thing, but at such a low resolution as to be unusable. Is there a way to
    combine the information from all the photos, perhaps the way that
    astronomers combine images from several radio telescopes, so as to get a
    better, higher resolution image?

    TIA
     
    Hmmm..., Oct 31, 2003
    #1
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  2. Hmmm...

    Mr3 Guest

    There is no reasonable way to combine several different low resolution
    images into one master image.
    The problem is data related. You can't use large data points (big pixels) to
    resolve smaller data points.
    Your problem is compounded by the "slightly different" nature of the data.
    If the image captures were made from the same vantage point with a slight
    offset, you could fake a better picture with layering the images.

    I think the radio telescope guys use narrow band, non-visible spectra
    captures from multiple instruments to create false color images. Hence the
    name 'radio' telescopes.

    HTH

    Mr3
     
    Mr3, Oct 31, 2003
    #2
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  3. Hmmm...

    Hmmm... Guest

    That's what I meant by slightly different. If they were exactly the
    same, no amount of adding the images together could possibly change any part
    of the final image.

    I'm thinking about, for instance, several video captures of a passing
    license plate. At 320 x 240 with the plate only covering a 10th of that, you
    can't read the letters. But if I could enhance it like in FBI movies...

    Deform the images until the shape matched, and/or/not the pixels until
    you find the most likely color for the final pixel and then write a new
    image.

    I suspect it could be done, given the right images and the right
    software, what I was wondering was if the software had been developed yet...
    Correct, but for any one pixel of the final image, they might refer to
    hundreds of data points from several sources.

    I may be on a wild goose chase, but I figure it can't hurt to ask. I've
    done a fairly lengthy search before posting my question, of course, but
    since I don't know if they make it or what it would be called... I just
    searched under "combine merge photographs astronomy pixels multiple" ...
    stuff like that.
     
    Hmmm..., Oct 31, 2003
    #3
  4. Hmmm...

    RSD99 Guest

    Re: "...
    But if I could enhance it like in FBI movies...
    ...."

    Don't even bother trying ... the "FBI movies" you are referring to are nothing more than
    Hollywood FICTION.
     
    RSD99, Oct 31, 2003
    #4
  5. Hmmm...

    Hmmm... Guest

    Um.. Duh? Do you run into a lot of folk who think that movies are real
    life?

    But I still can see how having enough information in several files could
    be assembled into one file with enough information. I probably know enough
    to write a program myself, but I am hoping it has already been written.

    I finally found a couple leads to programs that are written for Unix,
    but I don't run Unix.
     
    Hmmm..., Nov 1, 2003
    #5
  6. Hmmm...

    cvt Guest

    I know of no program/filter/method of doing it, but is may be possible,
    the theory sounds fair.

    I run *nix, so mind sharing the programs so I can have a look?
     
    cvt, Nov 1, 2003
    #6
  7. Hmmm...

    Hmmm... Guest

    Hmmm..., Nov 1, 2003
    #7
  8. Hmmm...

    Mr3 Guest

    Hollywood has lots of CG solutions that could be repurposed to 'morph' a
    composite image from multiple source images. Morphing is an extremely common
    task in today's production environment. For your purposes, the process would
    work like this...
    Assumptions:
    License plate capture of moving car.
    Video source file with 1-1/2 seconds of video with a reasonable view of the
    plate.
    Process:
    Digitize the video as fields creating 90 image files (30 frames/sec, 2
    fields/frame * 1.5 seconds)
    Sharpen and edge enhance all files
    Locate the clearest image (for this discussion, file 45)
    Morph all files to match the plate outline in file 45
    Overlay all files and apply various opacity and contrast adjustments to each
    layer to compensate for changing light and focus.

    Cross your fingers...

    The software starts at $5,000 and goes up. Most run on high-end SGI boxes,
    some WinTel is starting to happen.

    In Hollywood, the reverse scenario happens everyday.
    Scene: Car with lead actor stops on downtown street. City bus/commercial
    truck/cab drives through the scene. Rather than chase down the owner and get
    releases and clearances, the producers "fix it in post" by digitally
    replacing all offending signage on the city bus/commercial truck/cab.
    Especially when product placement dollars are at stake. Think "Coke"
    replacing "Pepsi" etc...
     
    Mr3, Nov 1, 2003
    #8
  9. Hmmm...

    cvt Guest

    I am going to download it all, and give it a try.. unfortunately its not
    in gentoo portage, and I'm on dialup, so it may take a couple days for me
    to get all the packages :(

    if it works well, and you still haven't found something I'll be happy to
    do it for you.
     
    cvt, Nov 2, 2003
    #9
  10. Hmmm...

    Hmmm... Guest

    I would be very interested in your results, but don't do it on my
    account. For my particular application I would need to have the software on
    my computer. I have been considering asking the guy for the source, I could
    compile it myself. I'll do that now, it can't hurt to ask.

    But really I just need a better camera. I need a digital that I can slap
    a telephoto on. Any recomendations for a used or discount camera?

    For now I am just going to use my film camera and scan the prints at a
    high resolution.
     
    Hmmm..., Nov 2, 2003
    #10
  11. Hmmm...

    Al Adrian Guest

    Spend some time reading the Astrophotography groups.. There's a Digital
    Astro group on Yahoo for instance... They discuss techniques of stacking
    images to enhance detail. I know for sure that any single picture of a
    planet that I take looks horrid, but if I stack a few dozen of them (there
    are free programs that automaticaly align and stack images of planets) using
    the best 25% of the bunch, the results are amazing.

    These techniques won't creat detail though.. it just takes detail that
    exists in some parts of some images and adds it up for lots of images,
    making a master image that shows the best bits of the best images.

    Al...
     
    Al Adrian, Nov 4, 2003
    #11
  12. Hmmm...

    Hmmm... Guest

    That's what I'm looking for, do you have any links?
     
    Hmmm..., Nov 4, 2003
    #12
  13. Hmmm...

    Al Adrian Guest

    Al Adrian, Nov 6, 2003
    #13
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