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Interesting development for underwater imagery / photography

Discussion in 'Underwater Photography' started by Divingblueberry, Nov 13, 2019.

  1. Sean Walberg

    Sean Walberg Nassau Grouper

    # of Dives: 25 - 49
    Location: Northern Virginia
    I'm kinda out of my wheelhouse on the marine side of it here but I think the paper mentions this:

    Previously, it was assumed that β D c = β B c , and that these coefficients had a single value for a given scene [9], but in [1] we have shown that they are distinct, and furthermore, that they had dependencies on different factors.​

    And as DoctorMike said it's for processing lots of pictures on computer for research, so multiple images shouldn't be a problem.

    I'm still trying to figure out if those 1,100 images with the color palette are just for checking accuracy or if they're training a model on it. Sea-Thru: A Method for Removing Water from Underwater Images | Hacker News has some discussion by people more attuned to the AI/vision aspects of this.
  2. tursiops

    tursiops Marine Scientist and Master Instructor ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: U.S. East Coast
    Your quote refers to the forward problem...trying to use inherent optical properties to clear up an image.
    When we White Balance, we are doing the inverse problem: we already know the answer (the point we are clicking on is white, or 18% gray), and we are changing the image to use that information.

    I'm sure lots of data crunching and clever AI can do as well as a good photographer white-balancing.... :) and using only one image.
  3. Brian G

    Brian G Nassau Grouper

    # of Dives: 100 - 199
    Location: Pittsburgh
    She's doing something much more in depth that what you can do in photoshop. She uses a video technique to get distance information for every pixel in the image, then corrects every pixel for the lost color information. You could do something similar with a 3d camera setup. She can't use a strobe for this because it would add more color information that she is already adding via the algorithm.
    Schwob and Mo2vation like this.
  4. outofofficebrb

    outofofficebrb HARRO HUNNAYYY

    # of Dives: 200 - 499
    Location: San Francisco, California
    Very cool. However, it seems for it to work, you still need lighting. In her photos, she has natural lighting. If you are deep enough, where will that come from? You still need a source, even if to focus and take a pic.
  5. dmaziuk

    dmaziuk Orca

    You just need a Titanic-size camera and exposure time of an hour or five.
  6. Hoag

    Hoag Loggerhead Turtle

    # of Dives: 200 - 499
    Location: Ontario
    Disregard the thread I started. I missed that there was already one on this exact topic.

    To the Mods. If possible, please delete this thread since there is nothing to be gained by it.

  7. Merry

    Merry Barracuda

    # of Dives: 1,000 - 2,499
    Location: Torrance, California
  8. Hoag

    Hoag Loggerhead Turtle

    # of Dives: 200 - 499
    Location: Ontario
  9. Colliam7

    Colliam7 Tech Instructor Staff Member

    # of Dives: 1,000 - 2,499
    Location: Kents Store, VA
    Didn't Delete it, just merged the two so all comments are in one.
    Hoag likes this.
  10. Ladonna I

    Ladonna I Garibaldi

    # of Dives: 1,000 - 2,499
    Location: Alabama
    Except it doesn’t work on an IPad any more. Apparently the developers are aware of this and their suggested fix is to ask you to switch to IPhone. Why in the world would I switch to a smaller screen. I’m looking for something else to replace Dive+
    Hatul likes this.

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