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Thread: This night sky does not exist

  1. #1
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    This night sky does not exist

    What could you deduce from these night skies?
    To me, they look often like a view from the edge of a galaxy, or a world in an irregular galaxy.
    https://arthurfindelair.com/thisnightskydoesnotexist/
    SHARKS (crossed out) MONGEESE (sic) WITH FRICKIN' LASER BEAMS ATTACHED TO THEIR HEADS

  2. #2
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    Quote Originally Posted by Tom Mazanec View Post
    What could you deduce from these night skies?
    To me, they look often like a view from the edge of a galaxy, or a world in an irregular galaxy.
    https://arthurfindelair.com/thisnightskydoesnotexist/
    From the link:
    These images are generated by a generative adversarial network (GAN) trained over 4500 images scraped from Instagram.
    I really don't know what the heck that means, but I guess it is some sort of computer-generated composite, or something like that.

    I've seen real images like that, usually taken with very long exposure times. Photographically/artistically these don't do a lot for me; not particularly good compositions (at least for the couple I looked at), IMO.
    Last edited by Swift; 2021-Apr-09 at 07:19 PM.
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  3. #3
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    By the nature of GAN and the training images used, we'd necessarily deduce that it was a view of a galaxy very much like ours, from a vantage point very much like ours.

    Grant Hutchison

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    With the messed-up foreground scenery and the visibly “off” galaxy, they look like views from other planets.
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  5. #5
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    So it is long exposures in the sample photos that make the generated night skies look wonky?
    SHARKS (crossed out) MONGEESE (sic) WITH FRICKIN' LASER BEAMS ATTACHED TO THEIR HEADS

  6. #6
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    Quote Originally Posted by Tom Mazanec View Post
    So it is long exposures in the sample photos that make the generated night skies look wonky?
    What seems "wonky" to you?

    Grant Hutchison

  7. #7
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    The galaxy is often fat, blobby or cut off at the horizon. Of course, it depends on the individual sky, but I expect the Milky Way to be a thin band.
    SHARKS (crossed out) MONGEESE (sic) WITH FRICKIN' LASER BEAMS ATTACHED TO THEIR HEADS

  8. #8
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    Quote Originally Posted by Tom Mazanec View Post
    The galaxy is often fat, blobby or cut off at the horizon. Of course, it depends on the individual sky, but I expect the Milky Way to be a thin band.
    Isn't it a feature of the sky, that it's cut off at the horizon?
    As for fat and blobby, that would depend on the simulated field of view, which we don't know. But under dark-sky conditions the Milky Way is impressively wide--easily 20 or 30 degrees.

    Grant Hutchison

  9. #9
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    I mean before the horizon, sorry...they sometimes seem to have a gap at the bottom.
    Maybe the few times I actually saw the Milky Way was not quite sark sky...it seemed much narrower then.
    SHARKS (crossed out) MONGEESE (sic) WITH FRICKIN' LASER BEAMS ATTACHED TO THEIR HEADS

  10. #10
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    The GAN has done a good job of reproducing the sky as it appears in astrophotographs of the Milky Way, I'd say, presumably because there is fairly limited variation between images, beyond issues of orientation and field of view. With a standard lens you have a FoV of about fifty degrees, so these galactic images don't seem anomalous to me--some a little zoomed in, some featuring wider-angle views.
    I assume the wider variety of landscapes in the teaching images is the cause of the surreal landscapes producted by the GAN. At the horizon, I'm seeing what seems to be a confused mash-up of distant landscape features and low clouds, so sometimes stars appear in front of what appears to be distant hills, and sometimes the stars disappear behind a feature that fades out of sight elsewhere in the image.

    Your view of the Milky Way would certainly depend on how dark your sky was, but also on what part you were looking at. At my home latitude I can never get a proper view towards the galactic centre, but it's pretty glorious as viewed from a dark-sky site in southern Africa or South America, where you can see Sagittarius and Scorpius high in the sky.

    Grant Hutchison

  11. #11
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    The really creepy one is This person does not exist:
    https://thispersondoesnotexist.com/
    Humans are supposed to be quite sensitive to the slightest defect in a human face, but I cannot tell these from top quality portrait photos.
    SHARKS (crossed out) MONGEESE (sic) WITH FRICKIN' LASER BEAMS ATTACHED TO THEIR HEADS

  12. #12
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    Yeah. Again, the GAN struggles with the backgrounds, which often don't make sense unless they're very out of focus. Collars and shoulders seem odd, too, sometimes, with the left and right sides mismatched or misproportioned.
    I've seen a couple of backgrounds that are quite disturbing, because there has evidently been a person in the background of some of the training photographs, and behind the happy and realistic foreground face, the GAN adds fragments of distorted faces to the background.

    ETA: Take a look at the scary broken pod-person at right of frame in this screengrab, for instance: https://i0.wp.com/oikofuge.com/wp-content/uploads/2021/04/2021-04-11-16_23_25-.jpg
    The worst ones are the ones with eyes, though, but I didn't have the patience to flick through until I found one.

    Grant Hutchison
    Last edited by grant hutchison; 2021-Apr-11 at 04:30 PM.

  13. #13
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    Quote Originally Posted by Tom Mazanec View Post
    The really creepy one is This person does not exist:
    https://thispersondoesnotexist.com/
    Humans are supposed to be quite sensitive to the slightest defect in a human face, but I cannot tell these from top quality portrait photos.
    I get freaked out when I see eyes that don't reflect the same thing or are reflections of eyes. Or when hair or skin has a highlight in the same tone as the reflections in the eyes, or worse, teeth. That just doesn't happen in real life.
    Solfe

  14. #14
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    I guess I've just been lucky in my tries.
    Here are some more:
    Art: https://thisartworkdoesnotexist.com/ Abstract paintings.
    Autos: https://www.thisautomobiledoesnotexist.com/ Worked fine when I tried it before, but the "spinning wheel" is taking forever now.
    Cats: https://thiscatdoesnotexist.com/ Maybe because there are so many images out there?
    Chairs: https://thischairdoesnotexist.com/ Actually surprisingly poor in quality.
    Chemicals: https://thischemicaldoesnotexist.com/ I understand these chemicals actually obey all the bonding laws, so could they exist?
    Cities: http://thiscitydoesnotexist.com/ Space views
    Emotions: https://jschn.github.io/FaceApp/ Actually line drawing of emotional faces.
    Eye: https://thiseyedoesnotexist.com/ Windows of the soul. Allows voting
    Feet: https://thisfootdoesnotexist.com/ Really creepy...feet morph into one another.
    Food: https://thisfoodblogdoesnotexist.com/ Yummy.
    Fursonas: https://thisfursonadoesnotexist.com/ Look good.
    Horses: https://thishorsedoesnotexist.com/ Realistic horses. Bizarre people if there are any.
    Lyrics: https://theselyricsdonotexist.com/ Actually better than some rock lyrics.
    Memes: https://imgflip.com/ai-meme Just the same picture with different labels.
    MPs: https://vole.wtf/this-mp-does-not-exist/ Could they be worse than reality? I'm sure they are better than US Congress!
    Music videos: https://www.thismusicvideodoesnotexist.com/ Music sounds good, video is of LSD like swirling colors
    News: https://www.fakefake.news/ Realistic headlines.
    Ponies: https://thisponydoesnotexist.net/ As in My Little Pony
    Questions: https://stackroboflow.com/question/333473 For stack overflow
    Rentals: https://thisrentaldoesnotexist.com/ Images are great, descriptions are so-so
    Resumes: https://thisresumedoesnotexist.com/ Surrealistic. Just surrealistic
    Simpson characters: https://www.this****eduphomerdoesnotexist.com/ The cartoon on acid - Grotesque renditions morph into one another
    Snacks: https://thissnackdoesnotexist.com/ Yum!
    Startups: https://thisstartupdoesnotexist.com/ Great source of startup names.
    Vessels: https://thisvesseldoesnotexist.com/#/ Mediocre
    Waifus: https://www.thiswaifudoesnotexist.net/ Great images, surprisingly good descriptions
    Words: https://www.thisworddoesnotexist.com/ Realistic sounding.

    Note: If you want to look at the Simpson characters, the blanked out letters are the F-bomb.
    SHARKS (crossed out) MONGEESE (sic) WITH FRICKIN' LASER BEAMS ATTACHED TO THEIR HEADS

  15. #15
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    Also came across butterflies and beetles, but they seem defunct (one is an add for the domain name being available, and the other is a security message that something hasn't been updated and so it is risky).
    SHARKS (crossed out) MONGEESE (sic) WITH FRICKIN' LASER BEAMS ATTACHED TO THEIR HEADS

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