4.1 • 11.9K Ratings
🗓️ 4 August 2017
⏱️ 8 minutes
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0:00.0 | This TED Talk features computer scientist Joseph Redman, recorded live at TED 2017. |
0:07.0 | Ten years ago, computer version researchers thought that getting a computer to tell the difference between a cat and a dog would be almost impossible. |
0:17.0 | Even with a significant advance in the state of artificial intelligence, |
0:21.5 | now we can do it at a level greater than 99% accuracy. |
0:26.1 | This is called image classification, given an image, put a label to that image, and computers |
0:31.9 | know thousands of other categories as well. |
0:34.9 | I'm a graduate student at the University of Washington, and I work on a project called |
0:39.3 | Darknet, which is a neural network framework for training and testing computer vision models. |
0:44.3 | So let's just see what Darknet thinks of this image that we have. |
0:50.3 | When we run our classifier on this image, we see we don't just get a prediction of dog or cat. |
0:57.0 | We actually get specific breed predictions. |
0:59.0 | That's the level of granularity we have now. |
1:01.0 | And it's correct. My dog is in fact a malamune. |
1:05.0 | So we've made amazing strides in image classification. |
1:09.0 | But what happens when we run our classifier in an image |
1:12.1 | that looks like this? Well, we see that the classifier comes back with a pretty similar |
1:23.5 | prediction. And it's correct, there is a malamute in the image, but just given this label, we don't |
1:29.7 | actually know that much about what's going on in the image. |
1:33.3 | We need something more powerful. |
1:35.5 | I work on a problem called object detection, where we look at an image and try to find all |
1:39.8 | of the objects, put bounding boxes around them, and say what those objects are. |
1:44.8 | So here's what happens when we run a detector on this image. |
... |
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