Scikit-image is a Python library that is built on top of NumPy and SciPy and offers a wide range of image processing capabilities, including image filtering, segmentation, and feature extraction.

SciPy. Image: SciPy. NumPy (see above) is so popular that several libraries are based on it, including SciPy. Like its inspiration, SciPy is also a free, and open-source library.