February 2020
Intermediate to advanced
94 pages
1h 59m
English
Content preview from Building Intelligent Apps with Cognitive APIs
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Chapter 4. Vision
We live in a world of objects, but identifying them in pictures today can be challenging. Digital images are represented as arrays of pixels and color values with no data describing the objects that those pixels represent. However, advancements in machine learning on images are removing this barrier by providing powerful tools for extracting meaning and information from these pixels.
The Cognitive Services Vision APIs provide operations that take image data as input and return labeled content you can use in your app, whether it’s text from a menu, the expression on someone’s face, or a description of what’s going on in a video. These same services are used to power Bing’s image search, extract optical character recognition (OCR) text from images in OneNote, and index video in Azure Streams, making them tried and tested at scale.
The Vision category includes six services: Computer Vision, Custom Vision, Face, Form Recognizer, Ink Recognizer, and Video Indexer. We will provide a brief introduction to each.
Computer Vision
Computer Vision provides tools for analyzing images enabling a long list of insights including detection of objects, faces, color composition, tags, and landmarks. Behind the APIs are a set of deep neural networks trained to perform functions like image classification, scene and activity recognition, celebrity and landmark recognition, OCR, and handwriting recognition.
Many of the computer vision tasks are provided by the Analyze Image API, which ...
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