Cs 1107 introduction to multimedia authoring systems
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CS 1107 Introduction to Multimedia Authoring Systems . October 2010. Website for this course. The website for this course is here: http://www.cs.ucc.ie/j.bowen/cs1107/. Learning outcomes. On successful completion of this module, you will be able to:

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CS 1107Introduction to Multimedia Authoring Systems

October 2010


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Website for this course

  • The website for this course is here:

    http://www.cs.ucc.ie/j.bowen/cs1107/


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Learning outcomes

  • On successful completion of this module, you will be able to:

    • demonstrate practical skills in multimedia authoring;

    • create, composite and manipulate

      • digital images, programmatically and using editors

      • audio files

    • augment web sites with digital content including

      • audio,

      • images, and

      • animations


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Assessment scheme

  • Continuous Assessment

    • 100 marks total, from

      • attendance and conduct at labs, 10 marks;

      • 2 in-class tests, 15 marks each;

      • 4 assignments, 15 marks each


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Digital Images

  • In this part of the course we will learn how to manipulate digital pictures

  • You will learn how to use PhotoPlus

    • The skills learned here will readily transfer to other, similar, packages, such as PhotoShop

  • You will learn how digital pictures are stored on the computer

    • So you should be able to understand how image-processing tools like PhotoPlus work

  • You will learn how to use the PHP programming language to create and manipulate digital pictures, including animations


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A motivating example

  • Suppose we have this photograph


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Example 1 (contd.)

  • And suppose we also have this photograph


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Example 1 (contd.)

  • Suppose we want to “cut out” the boy on the left


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Example 1 (contd.)

  • Suppose we want to “cut out” the boy on the left


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Example 1 (contd.)

  • And “paste” him into photograph of the picnic


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Example 1 (contd.)

  • We can easily do this in PhotoPlus


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Example 1 (contd.)

  • We can easily do this in PhotoPlus

    • First open PhotoPlus


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Example 1 (contd.)

  • We can easily do this in PhotoPlus

    • First open PhotoPlus

    • Then choose “open” on the File menu


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Example 1 (contd.)

  • We can easily do this in PhotoPlus

    • First open PhotoPlus

    • Then choose “open” on the File menu

      • and open the file containing the picture of the boy on the stairs


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Example 1 (contd.)

  • Now that we have opened the picture


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Example 1 (contd.)

  • Now that we have opened the picture

    • We can extract the piece we want


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Example 1 (contd.)

  • Now that we have opened the picture

    • We can extract the piece we want

  • Choose “Extract” from the Edit menu


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Example 1 (contd.)

  • This gives you a new window, called the Extraction Window


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Example 1 (contd.)

  • This gives you a new window, called the Extraction Window

  • Compare the two windows:

    • The Extraction Window (top)

    • The main window (bottom)

  • See that they contain different sub-windows


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Example 1 (contd.)

  • This gives you a new window, called the Extraction Window

  • Compare the two windows:

    • The Extraction Window (top)

    • The main window (bottom)

  • See that they contain different sub-windows


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Example 1 (contd.)

  • This gives you a new window, called the Extraction Window

  • Compare the two windows:

    • The Extraction Window (top)

    • The main window (bottom)

  • See that they contain different sub-windows


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Example 1 (contd.)

  • This gives you a new window, called the Extraction Window

  • Compare the two windows:

    • The Extraction Window (top)

    • The main window (bottom)

  • See that they contain different sub-windows


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Example 1 (contd.)

  • This gives you a new window, called the Extraction Window

  • Compare the two windows:

    • The Extraction Window (top)

    • The main window (bottom)

  • See that they contain different sub-windows


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Example 1 (contd.)

  • Notice that, at the top-left-hand corner of the Extraction Window, there is a tool which looks like a marker pen

  • This is called the edge marker

  • We will use it to mark the edge of the part of the picture that we want to extract


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Example 1 (contd.)

  • Notice that, at the top-left-hand corner of the Extraction Window, there is a tool which looks like a marker pen

  • This is called the edge marker

  • We will use it to mark the edge of the part of the picture that we want to extract


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Example 1 (contd.)

  • Notice that, at the top-left-hand corner of the Extraction Window, there is a tool which looks like a marker pen

  • This is called the edge marker

  • We will use it to mark the edge of the part of the picture that we want to extract


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Example 1 (contd.)

  • Notice that, at the top-left-hand corner of the Extraction Window, there is a tool which looks like a marker pen

  • This is called the edge marker

  • We will use it to mark the edge of the part of the picture that we want to extract


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Example 1 (contd.)

  • Notice that, on the right-hand side of the Extraction Window,

    • there are some Tool Options

    • One of these options is called “Brush Size”

      • It controls the width of the line that is made by the Edge Marker

      • By default, the width is set to 2


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Example 1 (contd.)

  • We will set the brush size to 4

    • In order to make it easier for us to see where we are drawing our line


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Example 1 (contd.)

  • Now, we use the mouse to draw line a line around the boy


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Example 1 (contd.)

  • When we have completed the line around the boy


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Example 1 (contd.)

  • When we have completed the line around the boy,

    • We choose another tool from the left side of the window to “cut out” the piece of the picture that we want


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Example 1 (contd.)

  • This new tool is called the “Foreground Tool”


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Example 1 (contd.)

  • This new tool is called the “Foreground Tool”

  • It looks like a tin of paint

  • Because we will use it to, temporarily, paint the area we want to extract


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Example 1 (contd.)

  • When we have selected the “Foreground Tool”


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Example 1 (contd.)

  • When we have selected the “Foreground Tool”

    • We click inside the green line


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Example 1 (contd.)

  • When we have selected the “Foreground Tool”

    • We click inside the green line

    • and the desired area will turn red


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Example 1 (contd.)

  • Now, we click on the OK button


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Example 1 (contd.)

  • Now, we click on the OK button

  • And we are returned to the main window again, where we see the cut-out of the boy

  • The chequer-board pattern is not “really there”

    • It denotes a transparent area


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Example 1 (contd.)

  • Now that we have got this cut-out, it would make sense to save it as a separate picture

    • In case we make a mistake and lose all our work


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Example 1 (contd.)

  • Now that we have got this cut-out, it would make sense to save it as a separate picture

    • In case we make a mistake and lose all our work

  • Choose Export from the File menu

    • And export the picture as a jpeg file


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Example 1 (contd.)

  • So, now, how do we “paste” this cut-out onto the picture of the picnic?

  • Before we can do that,

    • we must learn to use some other tools