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isosteph's profile
stephanie
stephanie
stephanie
@isosteph

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stephanie

@isosteph

ongoing core dump

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Joined October 2015

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    1. stephanie‏ @isosteph Apr 2
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      stephanie Retweeted Nicolas Kayser-Bril

      thinking abt once when a discussion abt bias in ML came up and an ML engineer was like "i don't see how there's a problem with ML or the model, it's just an issue with the training data"https://twitter.com/nicolaskb/status/1244921742486917120 …

      stephanie added,

      Nicolas Kayser-Bril @nicolaskb
      Black person with hand-held thermometer = firearm. Asian person with hand-held thermometer = electronic device. Computer vision is so utterly broken it should probably be started over from scratch. pic.twitter.com/hvqceJVZPv
      Show this thread
      7 replies 16 retweets 164 likes
    2. (((David Shor)))‏ @davidshor Apr 2
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      Replying to @isosteph

      Amusingly this is actually a problem with the ML model (Probably? Not totally what percentage of under-paid human annotators would classify image 1 as not a gun.)

      3 replies 0 retweets 1 like
    3. stephanie‏ @isosteph Apr 2
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      Replying to @davidshor

      stephanie Retweeted Bart Nagel

      nope that's not how this works. it's not like the training data contains tons of handheld thermometer pics that are getting mislabeled, it's far more likely that due to training data biases the model has builtin associations between dark skin + guns.https://twitter.com/bjnagel/status/1245300089226174465 …

      stephanie added,

      A crop of the original photo of the black person holding a thermometer, showing only the hand and device. Google's results say that it is 77% hand, 61% gun.
      A crop of the original photo of the black person holding a thermometer, showing only the hand and device. This one has been (inexpertly) edited to lighten and recolour the person's skin to be a more pale complexion, and some of the shading has been washed out. Most people would probably guess the person is white. Google's results say that it is 72% hand, 55% tool (not gun at all).
      A crop of the original photo of the black person holding a thermometer, showing only the hand and device. This one has been (inexpertly) edited to lighten and recolour the person's skin to be a more pale complexion, but keeping some shading. The person's race is now somewhat ambiguous. Google's results say that it is 79% hand, only.
      Bart Nagel @bjnagel
      Replying to @nicolaskb
      I cropped the first photo to just the hand and device, and did some very inexpert colour tweaks in an attempt to make the skin white, and somewhere in between. The results are troubling. pic.twitter.com/uPfLtVFpPY
      3 replies 2 retweets 20 likes
    4. (((David Shor)))‏ @davidshor Apr 2
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      Replying to @isosteph

      I just mean that whenever a supervised learning model forecast disagrees with what a training label would hypothetically be then it's a model error, because it's learning an association of "dark skin->guns" that doesn't generalize outside the training set.

      3 replies 0 retweets 2 likes
      stephanie‏ @isosteph Apr 2
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      Replying to @davidshor

      yeah i see how it's distinct from the amazon example below but i'd argue it's still a training set issue. can't say if the model is overfitting here — maybe it's learning everything it's fed at the correct level but w/o data bias we wouldn't have told it to learn this at all

      11:53 AM - 2 Apr 2020
      • 1 Like
      • (((David Shor)))
      1 reply 0 retweets 1 like
        1. New conversation
        2. stephanie‏ @isosteph Apr 2
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          Replying to @isosteph @davidshor

          either way models and their training data are inextricable from each other and u gotta check both to make sure they make sense

          1 reply 0 retweets 1 like
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