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Video 48: Adding Boxes, Rectangles and Circles on Images in OpenCV
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In this Raspberry Pi tutorial, learn how to annotate video frames using OpenCV, adding rectangles, circles, and text overlays to enhance your projects.


1. **Introduction**: Overview of the SunFounder Raphael kit for Raspberry Pi.
2. **Recap of previous lesson**: Using OpenCV to display video frames and overlay text.
3. **Annotating video frames**: Adding rectangles, circles, and text annotations between grabbing and displaying frames.
4. **Key considerations**: Understanding image coordinates (column, row) and color representation (RGB).
5. **Homework assignment**: Practice annotating video frames with different shapes and colors to reinforce learning.
6. **Performance impact**: Annotating frames may slightly reduce frame rate, so optimize annotations for efficiency.

**Video**

.. raw:: html

    <iframe width="700" height="500" src="https://www.youtube.com/embed/6Z7OlJu6RVk?si=1MrpgJEJCRVmrjlh" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>