The pixel (a word invented from "picture element") is the basic unit of programmable color on a computer display or in a computer image. Think of it as a logical - rather than a physical - unit. The physical size of a pixel depends on how you've set the resolution for the display screen. If you've set the display to its maximum resolution, the physical size of a pixel will equal the physical size of the dot pitch (let's just call it the dot size) of the display. If, however, you've set the resolution to something less than the maximum resolution, a pixel will be larger than the physical size of the screen's dot (that is, a pixel will use more than one dot). url

Macromedia Fireworks (also known as FW for short) is a bitmap and vector graphics editor, developed by Macromedia and aimed at web designers (with features such as: slices, the ability to add hotspots etc.). It is designed to integrate easily with other Macromedia products, such as Dreamweaver and Flash, and is part of the Macromedia Studio 8 suite.

the level of detail of an image

http://en.wikipedia.org/wiki/Resolution

A file format is a particular way to encode information for storage in a computer file.

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Vector graphics is the creation of digital images through a sequence of commands or mathematical statements that place lines and shapes in a given two-dimensional or three-dimensional space.

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In object-oriented programming, slicing is an operation to slice off a target value by size of the base type, thus extra parts will be gone. This is not the same as array slicing, however it does have similar characteristics.

http://en.wikipedia.org/wiki/Slicing

PNG (Portable Network Graphics) is a losslessly compressed bitmap image format.

http://en.wikipedia.org/wiki/PNG

Colour models are ,for example, RGB or CMYK

RGB (Red, Green, Blue) is the colour model for light and the colour model for computer and TV screens.

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Is the available colors supported by a computer graphics system.

http://en.wikipedia.org/wiki/Palette

A bit map (often spelled "bitmap") defines a display space and the color for each pixel or "bit" in the display space. A Graphics Interchange Format and a JPEG are examples of graphic image file types that contain bit maps.

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Manipulation happens when you change the colour , erase or cut out sections of any picture.