image files bmsc1103

Image File PresentationImage File Presentation

David AshbrookDavid Ashbrook

Jake Cannon Jake Cannon

Richard MbasuRichard Mbasu

James VestyJames Vesty

1. Vector based images and bitmap (or 1. Vector based images and bitmap (or raster) based imagesraster) based images

Vector imagesVector images are mathematically based. are mathematically based. All lines and shapes of a vector image are All lines and shapes of a vector image are

independent of one another. independent of one another. Vector images are easily scalable due to their Vector images are easily scalable due to their

use of mathematical formulasuse of mathematical formulas Bitmap (raster) imagesBitmap (raster) images are pixel based, are pixel based,

meaning that the location and colour meaning that the location and colour information are stored in individual pixels information are stored in individual pixels within a grid.within a grid.

2. The difference between a GIF 2. The difference between a GIF formatted file and a JPEGformatted file and a JPEG

JpegJpeg ( Joint Photographic experts group) ( Joint Photographic experts group) Used for compression of photographic imagesUsed for compression of photographic images Compressed using a string of bites. the stream is Compressed using a string of bites. the stream is

contained in file formatting.contained in file formatting. GifGif (Graphics interchange format) (Graphics interchange format) Used 256 different coloursUsed 256 different colours Used LDV to reduce loss of visual qualityUsed LDV to reduce loss of visual quality Unsuitable for photos Unsuitable for photos Good for logos and designs. Good for logos and designs.

3. Embedded graphics and linked 3. Embedded graphics and linked graphics in a Word or PowerPoint graphics in a Word or PowerPoint

document document Embedded graphicsEmbedded graphics are part of the document are part of the document

and are contained within itand are contained within it Linked graphicsLinked graphics can be edited in another can be edited in another

program and are changed in all documents that program and are changed in all documents that link to itlink to it

4. ‘Colour palette' 4. ‘Colour palette'

‘‘Colour palette'Colour palette' is the set of colours is the set of colours supported by an aplicationsupported by an aplication

5. Lossless compression 5. Lossless compression

Lossless compressionLossless compression allows data to be allows data to be extracted from its compressed file without loss extracted from its compressed file without loss of quality. Used in Zip and GZIPof quality. Used in Zip and GZIP

JPEG does not use this, it uses lossy JPEG does not use this, it uses lossy compression. This loses visual quality.compression. This loses visual quality.

7. Disadvantages of using .bmp 7. Disadvantages of using .bmp format files in your work format files in your work

The .bmp format losses quality when resizing The .bmp format losses quality when resizing the image the image

This can make the image look unprofessionalThis can make the image look unprofessional

8. Flickr 8. Flickr

FlickrFlickr is an online photo management and is an online photo management and sharing application. People use this resource to sharing application. People use this resource to share photos with their friends and families or share photos with their friends and families or simply to have a good organisation of their simply to have a good organisation of their pictures. pictures.