Graphics Questions

Q: What is a pixel?
A: One of the small units that make up an image on a computer or television screen.

Q: What is the difference between vector and bitmap graphics?
A: A vector is a graphic image drawn in shapes and lines, called paths, where as a bitmap are graphic images which are composed of a pattern of dots.

Q: What does “RGB” have to do with graphic files?
A: This is used to create all the colours shown on a colour screen so it will make up graphics files with the correct colours.

Q: What is an alpha channel? How can this be useful in your coursework project?
A: Information about pixels stored in images. This concept enables the storing of transparency information in images; it will be needed in our project for this purpose as we need transparency to make images of Derry with the new transport system.

Q: Using a TABLE, compare and contrast the features available in these 3 graphics packages:- Microsoft Paint- Photoshop- GIMP
A:
Application. Advantages. Disadvantages.

Microsoft Paint. Control over each dot in the picture. Angled lines are jagged stair steps,
especially if enlarged.

Photoshop. Add layers and edit each, add alpha. Images are greater size
channel.

GIMP. Add layers and edit each, add alpha. Images are greater size
channel.