OpenCV is an open-source tool that comprises Java, C++, C, and Python interfaces that supports Linux, Mac, Android, Windows, iOS, and other OS. It offers smart tools to the users for object detection, facial recognition, image classification, and explicit content detection. OpenCV is an ideal machine learning and computer vision software library explicitly designed for computational productivity and with a keen focus on real-time applications. Moreover, the algorithms can be deployed to recognize and detect faces, track camera movements, discover objects, categorize human actions in videos, extract 3D models of objects, track moving objects, stitch pictures together to deliver a high-resolution picture of a whole scenario. It further delivers 3D point clouds from a stereo camera, follows eye movements, discovers the same images from an image dataset, extracts red eyes from pictures taken using flash, and recognizes seen and creates markers to cover it with augmented reality. OpenCV follows the open-source pricing strategy and is completely free to use. It additionally offers support for Android, Windows, and Mac for smooth functioning of operations.