Digital Video Data Sizing

Data Rate.

• The rate at which information being transferred.
• expressed in {amount of information} per {unit of time}

How to calculate a uncompressed Digital video.

formula = frame size(width and height) * frame rate(fps) * color depth(in bytes) * time(in seconds)

8 bits = 1 byte

1 kilo(bit/byte) = 1,024 (bits/bytes)

1 Mega(bit/byte) = 1,048,576 (bits/bytes)

1 Giga(bit/byte) = 1,073,741,824 (bits/bytes) How to calculate uncompressed Audio File. 8-bit mono Seconds x kHz = Size 16-bit mono (Seconds x kHz) x 2 = Size 8-bit stereo (Seconds x kHz) x 2 = Size 16-bit stereo ([Seconds x kHz] x 2) x 2 = Size 16-bit 5.1 ([Seconds x kHz] x2) x 6 = Size Factors to consider when selecting graphics to be used in a multimedia project: a)  Purpose:       - Avoid using images for “filler” or when they have little in common with the overall         message or purpose.     - A common mistake is to trivialize products with cartoons that can be distracting to the         viewer.       - If multiple images are used, make sure they reflect a common message such as providing the user with an example or an illustration. b)   Quality:        - Any image used in a multimedia product should reflect the overall quality desired of          the entire product.        - The image colour depth has to be considered, especially for applications that will be          displayed on systems using a lower colour capability. c)   Cost:        - The cost of a graphic is directly related to its purpose and quality.        - Copyright and ownership of graphics will determine who is to be paid

Broadcast Video Standards

3 type of Broadcast Video Standars.

NTSC (national television standards comittee).

• have 525 lines/60 hz
• used in North America,South Korea,Japan
• using 30 fps(frame per second).

PAL(phrase alternate lines)

• have 625 lines/50 hz
• used in Europe, Asia
• 25 fps

SECAM(systeme electronique coleur avec memoire)

• 625 lines/50hz
• used in France and Russia.
• 25 fps

Photoshop: Drawing shape

Three different type of Shape can be created using shape tools.

• Clipping mask - acts as cookie cutter
• Path Shape - path created with pen tool
• Fill shape - created with pixels.

Path?

• line and curves to make the outlines of vector graphic.
• Two thumbnail on Shape layer
• left - fill layer which contain color of pixels
• right - vector mask, vector-based circle shape.

Photoshop : Type Tools.

Type Tools 

• point text created by click & type
• Text box created by click & drag

Type of attributes

• Kerning - spacing between one or more letter
• Tracking - spacing between letter in one words
• Leading - spacing between the lines
• Baseline shift
• vertical/horizontal scale
• Attributes

Warp text 

•  Contain 15 selection of styles to make a special effect for text for example ,ARC

Clipping mask for text

• can use the gradient to fill the text layer
• as a selection

Photoshop : Layers

Why we need layers in photoshop.

• create composite images
• create complex project
• correct color.
• add special effects
• repair photos.

5 Types of Layer

1. Normal layer - added on top of current layer
2. Layer Mask - protect areas of layer
3. Shape Layer - contain vector shapes
4. Adjustment Layer - modify an image without affecting original pixel
5. Type Layer - contain text elements

Merging and flattening

• Merging - combining two or more layers.
• Flattening - merge all layers in a document with a purpose of optimizing the file size
• Linked layers - will move together as one unit.

Layer style

Will add special effect to the layer which have several option of effects.

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Assignment 1 - Terminator:Genisys Poster and the QR code

This is the final poster that we produce for the upcoming Terminator:Genisys movie . we also provide the QR code on the poster.

The poster

This is the QR code that we use

 

Change the Colour of the Car with Photoshop.

With Photoshop you can also change the colour of your car or anything thing you want. the tools that we will use is 

1) Magic wand tool.

2) Adjustment layer (hue/saturation)

first, open the picture of Red Ferrari car in Photoshop.

Then, unlock the layer on the layer tab (just click twice on the layer and it will unlock).

After that, choose Magic wand tools to select the area that we want to colour in.

magic wand tool

if you are using the magic wand tools make sure to adjust the tolerance to make sure you get better result

tolerance amount can only be 0 - 255

and I use 30 tolerance so it will not select other part of the image.

Then, after you used the magic wand tool ,

go to layer at the top and find New Adjustment Layer then click on the hue/saturation.

after you click it you will get the hue/saturation adjustment tab at the right.

change it to whatever colour you want and its done.

Adjust the Hue:

example of the changed car colour :

And that's it.