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Visual Media Processing Using MATLAB Beginner's Guide

Visual Media Processing Using MATLAB Beginner's Guide

By : George Siogkas
4.5 (2)
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Visual Media Processing Using MATLAB Beginner's Guide

Visual Media Processing Using MATLAB Beginner's Guide

4.5 (2)
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 (13 chapters)
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12
Index

Time for action – heading

  1. Action 1
  2. Action 2
  3. Action 3

Instructions often need some extra explanation so that they make sense, so they are followed with:

What just happened?

This heading explains the working of tasks or instructions that you have just completed.

You will also find some other learning aids in the book, including:

Pop quiz – heading

These are short multiple-choice questions intended to help you test your own understanding.

Have a go hero – heading

These practical challenges give you ideas for experimenting with what you have learned.

You will also find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text are shown as follows: “Adapthisteq performs global histogram equalization.”

A block of code is set as follows:

function [output] = CroppedContrastEnhancement(input,method)

% Function that performs area-based image contrast enhancement with 
% methodsincorporated in MATLAB toolboxes
% Inputs:
%           input - Input image
%           method - Enhancement method (1: histeq, 2: imadjust, 
%                                        3: adapthisteq)
% Output:   
%           output - Output image (with enhanced contrast)

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

img = imread(‘my_image.bmp’); % Read image
subplot (1,2,1) % Open a figure for 2 images
imshow(img) % Show original image
title (‘Original image’) % Add title
threshold = 150; % Set threshold level
img(img > threshold) = 255; % Set pixels above 150 to 255
img(img <= threshold) = 0; % Set pixels below 150 to 0
img = logical(img); % Convert img to binary
subplot (1,2,2) % Make second image spot active
imshow(img) % Show thresholded image
title (‘Thresholded image’) % Add title

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: “You should start with the first and easiest step, which is loading and displaying our photograph into the Workspace window.”.

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.

CONTINUE READING
83
Tech Concepts
36
Programming languages
73
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Visual Media Processing Using MATLAB Beginner's Guide
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