Graphics

A graphics program allows you to combine pictures and text in many different ways.

Features – General Level

• Draw graphics

• Enter Text

• Common Tools

• Alter Tool Attributes

• Scale Graphic

• Rotate Graphic

Draw

You draw a graphic on the screen using a:

• Mouse

• Track Pad

• Graphic Tablet

• Keyboard

Text

A graphic package also allows you to enter text anywhere on the screen.

STANDARD GRADECOMPUTING IS FANTASTIC!

Serif Draw Toolbar

Pointer

Rotate

Node

Pencil

Paintbrush

Pen

Line

Quick Shapes

Text Tool

Insert Picture

Pointer

Allows the user to select, move, copy, and resize objects.

Rotate

Allows the user to rotate objects around a centre point in a certain number of degrees.

Node

Allows the user to manipulate the shape of objects. For example, a rectangle can become a curved rectangle

Pencil

Choose this tool to sketch lines using a freeform pencil.

Paintbrush

Choose this tool to paint with either one of a selection of preset brushes or with your own customized paintbrush.

Pen

Allows the user to creates a series of connected line segments (which may be curved or straight) using a series of "connect the dots" mouse clicks.

Line

Choose this tool to create straight line segments.

Quick Rectangle

Click to display the QuickShapes flyout menu, then select one of the available QuickShapes.

Text Tool

Choose this to add text to your document or edit existing text.

Common Toolbar

Set of tools that are common to most drawing graphics packages

• Shapes (circle, rectangle, polygon)

• Free hand (pencil, paintbrush, pen)

• Selection (arrow)

• Fill (colour wheel, paint bucket)

Colour wheel

Allows the user to change the colour of a shape or text

Fill Colour

Line Colour

Common Toolbar (cont)

• Text – add text to your document or edit existing text.

• Zoom

Alter Attributes

Changing the properties of a tool. The way the shape is displayed, for example, changing the line thickness or fill of a shape.

• Line thickness changed to 6pt

• Pattern has been given to the fill

Scale GraphicChanging the size of the graphic by making it larger or smaller.

Rotate the GraphicTurn the whole graphic through a certain number of degrees.

Crop Graphic - Credit

Is to reduce the size of a graphic by cutting parts from the edges.

The unwanted parts of the graphic.

Paint and Draw (Credit)

Graphics packages can be classified into two main types:

• Paint (bit mapped) – Windows Paint

• Draw (vector) – Serif Draw

Paint

Produce pictures by changing the colour of tiny dots called pixels.

1 1

= 1

= 0

Features of bitmapped graphics:

• Each pixel can be changed individually i.e. colour

• Edit a bit mapped graphic by deleting pixels anywhere on the image.

•Bit-Mapped images require a large amount of storage space, as every pixel is stored including white space.

•Once they are enlarged to much, they look unnatural and blocky.

Draw

Draw packages work by producing objects on the screen. The store images by their description.

• The shape of graphic objects• Their position on the screen• Their attribute such as fill, line colour

Example• Line thickness = 5pts• Fill pattern = red diagonal brick• Co-ordinates and radius of position

Features of vector graphics:• Take up less storage space

• Do not lose their quality when resized

• Objects can be grouped to form larger objects

• User cannot edit individual pixels

• Complex objects with many layers can demand a lot of storage space.

Grouped ImageYou can easily turn a multiple selection into a group object. When objects are grouped, you can position, resize, rotate, or shear all the objects at the same time.

Resolution

The amount of detail which can be shown on a screen. Measured in dpi – dots per inch.

Small pixels mean high resolution

Large pixels mean low resolution

Calculate the size of an image. – 25 Jan

Black and White bitmapped Image – Credit

= 2666 x 1764

= 4702824 pixels

= 4702824 bits/8 – putting the answer into bytes – divide 8

= 587853 bytes/1024 – put the answer into Kb – divide 1024

= 574.075 Kb

Image

2666 pixels

1764 pixels