A developer specializes in using OpenCV (Open Source Computer Vision Library), a software toolkit for processing real-time image and video data. They design and implement computer vision applications such as object detection, tracking, and recognition, or image enhancement and segmentation. They write algorithms to process, analyze, and interpret visual data, often working with machine learning and AI technologies. They may also integrate this technology into existing applications, websites, or systems. Their work can be used in a variety of sectors, including robotics, automotive, healthcare, surveillance, and entertainment.