Google Cloud Vision API is one of the machine learning services exposed under the Cloud AI vertical. This service is used to analyze images and their contents using machine learning models. This service can:

• Classify images into thousands of categories (label detection)
• Detect individual objects
• Detect faces
• Detect explicit content
• Detect logos
• Detect landmarks
• Detect similar images on the web (web detection)
• Get image attributes
• OCR: Optical Character Recognition

The beauty of Vision API is that it improves over time and continues to learn from various sources.