Chapter 13: Digital Video Sizing

 Data Rate 

•  the rate at which information being transferred.
• data rate used to describe the speed of a hard drive is Megabytes/second.

 Calculate the file size of an uncompressed digital video file

Raw video data size

= frame size (width X height) * frame rate (fps) * colour depth (in bytes) *

    time (in seconds)

Bits: 

1 byte = 8 bits

1 kilobyte = 1,024 bits

1 megabyte = 1,048,576 bits

1 gigabyte = 1,073,741,824 bit

Calculate the file size of an uncompressed digital audio file 

Factors to consider when selecting graphics to be used in a multimedia project

•  Purpose 
•  Quality  
•  Cost

Chapter 12: Broadcast Video Standard

 Boardcast Video Standards

 •  NTSC (National Television Standards Committee)

  - 525 lines/60Hz

  - This standard is used primarily in North America, Taiwan, South Korea, Japan.

  - 30 fps

•PAL (Phase Alternate Line)

  - 625 lines/50Hz

  - This standard is used primarily in Europe, Asia, and Southern Africa.

  - 25 fps

•SECAM (Systeme Electronique Couleur Avec Memoire)

  - 625 lines/50Hz

  - This standard is used primarily in France, parts of Middle East, and Russia.

  - 25 fps

  

Chapter 11: Drawing Shapes

1)  Types of Shapes using Shape Tools

• Clipping mask - act like a cookie cutter
• Path shape - create path like the one in pen tool
• Fill shape - created with pixel

Chapter 9 & 10 : Text

1) Type Tool

  

2)  Type of Attributes     

   (i) Kerning
   (ii) Tracking
  (iii) Leading
  (iv) Vertical/Horizontal Scale
  (v) Baseline Shift
 (vi) Attributes (SuperScript, SubScript, All Caps, Bold, etc)

3) Using Text as a Clipping Mask

    Type mask :- can be used to add a gradient fill to text.

                        :-  a selection in the shape of type that can be filled.

Chapter 6 & 7 : Working with Layers and Layers Style

1) Functions of Layers 

   (i)  create composite images
   (ii) create complex projects
   (iii) correct color
   (iv) add special effects
   (v) repair photos

  

2) 5 Types of Layers Merging & Flattening Layers

   (a) Normal layers          : added on top of the current layer
   (b) Adjustment layers   :  modify an image without affecting the original pixels
   (c) Layer mask              : protects area of layers
   (d) Shape layers            : contain vector shape
   (e) Type layers              : contain text elements

 3) Merging & Flattening Layers 

      Merging            -  combining two or more layers

      Flattening         - merges all layers in a document with the purpose of optimizing the file size

      Linked layers   - move together as one unit

      

4) Layers Style

            Layer styles add special effects to an image

            Several options are available for different layer styles

Chapter 4 & 5: Marking And Manipulating Selections

 

1) Marquee Tool

2) Lasso Tool

   (a) Polygonal Lasso Tool  : creates straight sided selections around objects by clicking the objects                                                   edges  

  (b) Magnetic Lasso Tool    : tracks the edges of the object based on shifts in color or tone

  (c) Lasso Tool                    : create tracing based on freehand tracing

3) Transforming Selections 

  (a) Scale                : changes the size of a selection.
  (b) Rotate              : will spin a selection
  (c) Skew/Distort   : stretches and pulls a section
  (d) Perspective     : simulates object meeting at a horizon line
  (e) Flipping          : turns a selection on its vertical or horizontal axis

4) Saving & Loading Selections 

       Channels :- Black and White image contain one color channel 

                        - An RGB image contains 4 channels

                        - A  CMYK  image contains 5 channels 

Chapter 3: Painting and Drawing with Color

1) Brush Palette

   - contains an unlimited number of options and settings to create and customize brushes. 

  

2) Brush Tool

  - add color to an image or to retouch area of an image.
  - only work on pixels and not on vector image.        

3) Creating Blends

  - smooth transition between 2 or more colors.
  - affect how paint interacts with the pixels underneath the painted area.
  - affects the transparency of the color, pattern, or effect.

4) Eraser Tool

• Normal Eraser Tool

          - Background layer : paints with the background color

          - Normal layer        : erases all data, making that area transparent 

          

• Background Eraser Tool

          - deletes the background pixels of a layer

• Magic Eraser Tool

          - erasers pixels of the same color of the area that was clicked.