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fchollet's profile
François Chollet
François Chollet
François Chollet
Verified account
@fchollet

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François CholletVerified account

@fchollet

Deep learning @google. Creator of Keras. Author of 'Deep Learning with Python'. Opinions are my own.

United States
fchollet.com
Joined August 2009

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    1. François Chollet‏Verified account @fchollet 19 Apr 2018

      There's a need for an ambitious new AI benchmark that would measure the generalization power of a model -- the size of the radius in problem space around training data points for which the model can operate. Goal: maximize that radius while minimizing # of training data points.pic.twitter.com/EkIfpldyzd

      15 replies 175 retweets 602 likes
      Show this thread
    2. Ferenc Huszár‏ @fhuszar 19 Apr 2018
      Replying to @fchollet

      Isn’t the problem with this the same as kernel machines: how do you choose a meaningful measure of distance? Ideally your radius-extended blue set should resemble the test data distribution for this to be a measure of generalisation. What am I missing?

      1 reply 0 retweets 23 likes
    3. François Chollet‏Verified account @fchollet 19 Apr 2018
      Replying to @fhuszar

      The point is to test on data that does not, in fact, resemble the training distribution. You are right that picking an appropriate definition for distance is important. This is domain-specific, there will not be one universal definition. But there can be one for images, or games

      2 replies 0 retweets 4 likes
    4. Ferenc Huszár‏ @fhuszar 19 Apr 2018
      Replying to @fchollet

      So you’re testing a special case of domain adaptation. Presumably, if you know the definition of the distance you could just train with corresponding data augmentation? Say, for Euclidean distance use spherically symmetric additive noise.

      1 reply 0 retweets 8 likes
    5. François Chollet‏Verified account @fchollet 19 Apr 2018
      Replying to @fhuszar

      I think you're hopelessly missing the point.

      1 reply 0 retweets 0 likes
    6. Ferenc Huszár‏ @fhuszar 19 Apr 2018
      Replying to @fchollet

      It was a pleasure engaging in a discussion about your idea. I’m sorry you had to give up on me.

      1 reply 0 retweets 47 likes
    7. François Chollet‏Verified account @fchollet 19 Apr 2018
      Replying to @fhuszar

      In case you were actually expecting a reply: the purpose of this property is that it is useful in the real world. You might want, for example, to train a robot to operate in a couple kitchen then have it operate in an unknown kitchen. Which humans can do.

      1 reply 0 retweets 3 likes
    8. François Chollet‏Verified account @fchollet 19 Apr 2018
      Replying to @fchollet @fhuszar

      A DL model would have to be trained on a dense sampling of all possible kitchens. In the real world it's easy to come up with novel test data points but impossible to have a formal definition for generalization distance, let alone a way to use data aug. to cover the full space.

      1 reply 0 retweets 4 likes
      François Chollet‏Verified account @fchollet 19 Apr 2018
      Replying to @fchollet @fhuszar

      Naturally you know this and you weren't expecting me to point it out. You frequently send me these bad faith adversarial/ironic replies where you play dumb to make a point. Too used to it to "engage", sorry. It was my mistake for even replying in the first place

      1:11 PM - 19 Apr 2018
      • 5 Likes
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      2 replies 0 retweets 5 likes
        1. Jeroen Janssens‏ @jeroenhjanssens 19 Apr 2018
          Replying to @fchollet @fhuszar

          No, your mistake was to think that he’s hopelessly missing the point!

          0 replies 0 retweets 1 like
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        2. Vahid Kazemi‏ @VahidK 19 Apr 2018
          Replying to @fchollet @fhuszar

          I think there was a misunderstanding here. @fchollet you said, the goal is to maximize the radius. @fhuszar say if we knew how to measure that radius we could have easily solved the problem. The million dollar question is how to define that distance.

          2 replies 0 retweets 2 likes
        3. François Chollet‏Verified account @fchollet 19 Apr 2018
          Replying to @VahidK @fhuszar

          I think the solution will rely mostly on: 1) working with programs that are richer than neural networks (i.e. which can express complex and general information processes in a compact form), e.g. going from ML to program synthesis

          1 reply 1 retweet 6 likes
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