Book Image

Visual Media Processing Using MATLAB Beginner's Guide

By : George Siogkas
Book Image

Visual Media Processing Using MATLAB Beginner's Guide

By: George Siogkas

Overview of this book

Whether you want to enhance your holiday photographs or make a professional banner image for your website, you need a software tool that offers you quick and easy ways to accomplish it. All-in-one tools tend to be rare, and Matlab is one of the best available.This book is a practical guide full of step-by-step examples and exercises that will enable you to use Matlab as a powerful, complete, and versatile alternative to traditional image and video processing software.You will start off by learning the very basics of grayscale image manipulation in Matlab to master how to analyze 3-dimensional images and videos using the same tool. The methods you learn here are explained and expanded upon so that you gradually reach a more advanced level in Matlab image and video processing. You will be guided through the steps of opening, transforming, and saving images, later to be mixed with advanced masking techniques both in grayscale and in color. More advanced examples of artistic image processing are also provided, like creating panoramic photographs or HDR images. The second part of the book covers video processing techniques and guides you through the processes of creating time-lapse videos from still images, and acquiring, filtering, and saving videos in Matlab. You will learn how to use many useful functions and tools that transform Matlab from a scientific software to a powerful and complete solution for your everyday image and video processing needs.
Table of Contents (18 chapters)
Visual Media Processing Using MATLAB Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

A tool just for your playback needs – implay


Until now, we have demonstrated ways to display videos in MATLAB that are quite useful for adding processing steps in the loop, but are somewhat difficult in comparison to standard video-playing software. However, MATLAB also provides a tool aimed at those that do not want to get their hands dirty with frame-by-frame processing. Its name is implay and it has a pretty straightforward usage. It can be used in three different ways; as a standalone GUI-based video player, as a function that plays back a given image sequence stored in a matrix and as a function that loads and plays a video given its filename. Let's see how these work.

Using the GUI of implay

This is the most common way to use this tool. It is invoked by typing in its name:

>> implay

This opens the following window:

This GUI gives you the following choices:

  • To open up a new player (clicking on the first icon from the left)

  • Printing your frames (using the second icon from the left)

  • Opening...