A pretrained model is a model created and trained by someone else to solve a problem that is similar to ours. In practice, someone is almost always a tech giant or a group of star researchers. They usually choose a very large dataset as their base datasets such as ImageNet or the Wikipedia Corpus. Then, they create a large neural network (e.g., VGG19 has 143,667,240 parameters) to solve a particular problem (e.g., this problem is image classification for VGG19). Of course, this pretrained model must be made public so that we can take these models and repurpose them.

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⌚Time Stamps⌚

00:00 Intro
01:11 Why use pretrained models?
04:19 ImageNET Dataset
09:16 ILSVRC
13:24 Architecture of AlexNET
15:05 Famous Architectures
17:45 Idea of pretrained models
21:20 Code Example