OpenCV 4 with Python Blueprints - Second Edition

Understanding color spaces

Alternatively, you might find that colors contain some information that raw grayscale values cannot capture. Traffic signs often have a distinct color scheme, and it might be indicative of the information it is trying to convey (that is, red for stop signs and forbidden actions; green for informational signs; and so on). We could opt to use the RGB images as input, but, in our case, we do not have to do anything since the dataset is already RGB.

However, even RGB might not be informative enough. For example, a stop sign in broad daylight might appear very bright and clear, but its colors might appear much less vibrant on a rainy or foggy day. A better choice might be the HSV color space, which represents colors ...