Tagged "computervision"

Effective Train/Test Stratification for Object Detection

TL;DR: Here’s a talk based on this post: There’s an unavoidable, inherent difficulty in fine-tuning deep neural networks for specific tasks, which primarily stems from the lack of training data. It would seem ridiculous to a layperson that a pretrained vision model (containing millions of parameters, trained on millions of images) could learn to solve highly specific problems. Therefore, when fine-tuned models do perform well, they seem all the more miraculous.

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Weighted Loss Functions for Instance Segmentation

This post is a follow up to my talk, Practical Image Classification & Object Detection at PyData Delhi 2018. You can watch the talk here: and see the slides here. I spoke at length about the different kinds of problems in computer vision and how they are interpreted in deep learning architectures. I spent a fair bit of time on instance and semantic segmentation (for an introduction to these problems, watch Justin Johnson’s lecture from the Stanford CS231 course here).

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