Summary

This chapter discussed the popular data sources for the computer vision community. These data sources often have pre-trained models that help you quickly build computer vision applications. We also learned about the common places to download computer vision datasets. If no datasets exist for a specific computer vision task, this chapter also helped you get images by downloading them from the internet and select a tool for labeling the downloaded images. Furthermore, the computer vision field is developing rapidly, and many different annotation formats are available. Therefore, this chapter also covered popular data formats and the steps to convert these formats into the format supported by Detectron2.

By this time, you should have your dataset ready. The next chapter discusses the architecture of Detectron2 with details regarding the backbone networks and how to select one for an object detection task before training an object detection model using Detectron2.