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OpenCV By Example

OpenCV By Example

By : Joshi, Millán Escrivá, Vinícius G. Mendonça
3.8 (5)
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OpenCV By Example

OpenCV By Example

3.8 (5)
By: Joshi, Millán Escrivá, Vinícius G. Mendonça

Overview of this book

Open CV is a cross-platform, free-for-use library that is primarily used for real-time Computer Vision and image processing. It is considered to be one of the best open source libraries that helps developers focus on constructing complete projects on image processing, motion detection, and image segmentation. Whether you are completely new to the concept of Computer Vision or have a basic understanding of it, this book will be your guide to understanding the basic OpenCV concepts and algorithms through amazing real-world examples and projects. Starting from the installation of OpenCV on your system and understanding the basics of image processing, we swiftly move on to creating optical flow video analysis or text recognition in complex scenes, and will take you through the commonly used Computer Vision techniques to build your own Open CV projects from scratch. By the end of this book, you will be familiar with the basics of Open CV such as matrix operations, filters, and histograms, as well as more advanced concepts such as segmentation, machine learning, complex video analysis, and text recognition.
Table of Contents (13 chapters)
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12
Index

How the text API works

The text API implements the algorithm proposed by Lukás Neumann and Jiri Matas in the article called Real-Time Scene Text Localization and Recognition during the CVPR (Computer Vision and Pattern Recognition) Conference in 2012. This algorithm represented a significant increase in scene text detection, performing the state-of-the art detection both in the CVPR database as well as in the Google Street View database.

Before we use the API, let's take a look at how this algorithm works under the hood, and how it addresses the scene text detection problem.

Note

Remember that the OpenCV 3.0 text API does not come with the standard OpenCV modules. It's an additional module present in the OpenCV contribute package. If you need to install OpenCV using the Windows Installer, refer to Chapter 1, Getting Started with OpenCV, which will help you install these modules.

The scene detection problem

Detecting text that randomly appears in a scene is a problem harder...

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