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

Acquiring frames for time-lapse videos


Now that you know how to acquire frames using the Image Acquisition Tool, and you have also understood the implications of enlarged uncompressed video sizes, it is time to revisit a technique covered in the previous chapter. More specifically, we will now discuss how the imaqtool can be used to create time-lapse videos. There are two ways we can use it:

  1. By acquiring a full video and then following the process shown in the previous chapter to extract the frames that will be used to make your time-lapse video. However, this process has the obvious flaw of requiring too much disk space in cases of videos that may last a day, or more.

  2. By manually triggering as many frames as you want (after having specified their number in Number of triggers). Of course, this way isn't ideal either, since it demands manual interaction.

This leads us to the conclusion that in order to tackle special tasks, such as time-lapse video creation, we should find alternative methods...