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
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Slide1
Rastor vs Vector
Higher Graphics Miss Airlie
Slide2What 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
Slide3What 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.
Slide4Vector 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.
Slide5Common 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)
Slide6Raster/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.
Slide7Raster/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.
Slide8Vector 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
Slide9Vector disadvantages
It is not the best format for photographs or photo-like elements with blends of
colour
.
Slide10Research 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?