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Rastor   vs  Vector  Higher Graphics Rastor   vs  Vector  Higher Graphics

Rastor vs Vector Higher Graphics - PowerPoint Presentation

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Uploaded On 2020-06-22

Rastor vs Vector Higher Graphics - PPT Presentation

Miss Airlie What will we learn I will learn about Vector and Raster graphics I will learn about the advantages and disadvantages of both types of graphics I will learn about the common file formats used for each ID: 782813

raster vector image graphics vector raster graphics image bitmap file images learn format advantages quality large disadvantages squares graphic

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Presentation Transcript

Slide1

Rastor vs Vector

Higher Graphics Miss Airlie

Slide2

What will we learn?

I will learn about Vector and Raster graphics

I will learn about

the advantages and disadvantages of both types of graphics

I will learn about

the common file formats used for each

Slide3

What are they?

Vector

images are mathematical calculations from one point to another that form geometrical shapes.

Raster

(bitmap)

images are made of pixels. A pixel is a single point or the smallest single element in a display device.

Slide4

Vector graphics are scalable - ie when you resize them, they do not lose quality.

When you take a photograph using a digital camera or scan an image from a magazine, you are creating a

raster (bitmap)

graphic.

Slide5

Common file types

Raster/Bitmap

Vector

.

bmp

(

BitMaP

)

jpeg

Joint Photographic Experts Group

Gif

(Graphics Interchange Format)

Tiff

(Tagged Image File Format)

.png (Portable Network Graphics)

.

cgm

.

svg

(Scalable Vector Graphics)

.

odg

.

eps

(

Encapsulated PostScript)

.

dxf

(drawing exchange format)

Slide6

Raster/bitmap Advantages An image which is made up of tiny squares of colour. The arrangement of these tiny coloured squares produce the effect of an image. This is a good method of reproducing 'continuous tone' images, such as photographs.

Slide7

Raster/bitmap disadvantages

cannot

be

scaled up without losing quality. Why

?

Is bound by the number of pixels in the image.

Large dimensions & detailed images equal large file size.

Some service providers like engravers, stencil-cut signs,

etc

, must have vector art.

It is more difficult to print raster images using a limited amount of spot

colours.

Depending on the complexity of the image, conversion to vector may be time consuming.

Slide8

Vector Advantages

can be scaled up without losing quality. Why? Made of mathematical calculations that form objects and lines

.

a small file

size

They are ideal for logo designs, as they can be printed very small on business cards or printed large on a billboard poster.

business cards

Slide9

Vector disadvantages

It is not the best format for photographs or photo-like elements with blends of

colour

.

Slide10

Research Task .bmp

jpeg

Gif

Tiff

.png

.

cgm

.

svg

.

odg

.

eps

.dxf Research the above file formatsWhat do the abbreviations stand for What graphic type do they belong in i.e. Raster OR Vector?

3

. Explain what you would use them for?