Re:Cloud Video Intelligence API
by imh on Wednesday March 08, 2017 @04:07PM
(#13823798)
The demo picture they chose is interesting. It's obviously a tiger, and is identified as such with only 90% probability. I appreciate the difficulty of the problem and how big of a success it is to achieve even that level of confidence, but that low level of confidence really shows how far we are from being able to simply trust computer vision. Still useful from an information retrieval perspective, I expect.
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Re:Cloud Video Intelligence API
by muzakthings on Wednesday March 08, 2017 @04:24PM
(#13823944)
You realize that softmax scores aren't probabilities, right?
It's just a relative measure of confidence, scaled such that they all sum to 1.0.
That's kinda true, but (regularization aside) for standard loss functions it's minimized at the point it's well calibrated, right? Given the scores in the image (97% animal, 90% tiger, etc) they seem to be binary classifiers e.g. "is this a tiger?" So of all scores in the neighborhood of 90%, 90% should be "yes it is," making it a measure of confidence compatible with probability.
Please someone correct me if I'm wrong, but I'm pretty sure that's how it works, just like how logistic regression gives you a probability.
Re:Cloud Video Intelligence API
by chipperyman573 on Wednesday March 08, 2017 @04:46PM
(#13824145)
You can't add any of the numbers in the picture to equal 1.0 (or 100)