We already know that the easiest (and most common) way to load an image in OpenCV is to use the imread function. We also know that this will return an image, which is really an array (either a 2D or 3D one, depending on the parameters you passed to imread).
The numpy.array class is greatly optimized for array operations, and it allows certain kinds of bulk manipulations that are not available in a plain Python list. These kinds of numpy.array type-specific operations come in handy for image manipulations in OpenCV. However, let's explore image manipulations step by step, starting with a basic example. Say you want to manipulate a pixel at coordinates (0, 0) in a BGR image and turn it into a white pixel: ...
