Powerpoint about file types.

1. Digital Graphics
File Formats
JJ Rae

2. Raster Graphics
• Give a definition of Raster Graphics
Raster Graphics are bitmaps. They use small pixels as data
which contains information of colour of the section of the
image. Bitmapped images are fixed, & resizing causes
distortion. Megapixel's are in million bits which is what
separates the picture into.

3. Vector Graphics
• Give a definition of Vector Graphics
Vector graphics are made up of vectors (also
known as path/strokes). They are defined with a
start & end point. Can become a line, square,
triangle, or curvy shape.

4. Raster Graphics

5. JPEG
Stands For Joint Photographic
Experts Group
Used For/Example Jpeg is used for digital
images. It is a common use
when involving lossy
compression.
Advantage Digital images on the web
& around are usually in a
JPEG format. Takes less file
size than some other
image formats.
Disadvantage Loses quality with multiple
edits due to compression &
re-compression each time
edited.

6. TIFF
Stands For Tagged Image File Format
Used For/Example TIFF’s are used for desktop
publishing (it is popular amongst
Graphic designers)
Advantage Adobe in design documents saved as
TIFF’s can save multiple page
documents for a single TIFF file.
TIFF has the option of bssless
compression.
It doesn’t lose quality due to
compression.
Disadvantage The main disadvantage is that the
file size can become huge in
memory. Most things will not open.

7. GIF
Stands For Graphics Interchange Format
Used For/Example Used for short digital animations,
often on the internet. A series of
images played one after another
in a loop to create an appearance
of a video.
Advantage It is easy to create, and be
quicker than creating a real
video.
Disadvantage It may not always work properly.
May need additional
programmes to watch

8. BMP
Stands For BitMap
Used For/Example It is similar to TIFF’s & Jpeg’s.
Advantage No loss in compression.
Disadvantage The file size is larger than
normal.

9. Vector Graphics

10. PSD
Stands For Photoshop Document
Used For/Example Image manipulation. Front
cover images for magazines.
Advantage Saves layers, page
formatting information,
swatches etc. Also supports
transparency.
Disadvantage Not many programmes will
open up a PTSP file. The file
size could also be huge in
memory.

11. AI
Stands For Adobe Illustrator Art
Used For/Example Used for logo’s creation. It
is graphics to represent a
company.
Advantage Can be scaled big & small
as the vectors have no loss
in definition.
Disadvantage May be complex for some
users. May also not work
to create images for other
uses.

12. FLA
Stands For Flash File
Used For/Example It is used to create
animation & games.
Advantage Can produce high
quality files with a
small file size in
memory. It also can
include sound &
video.
Disadvantage

13. WMF
Stands For Windows metafile
Used For/Example Similar to AI files, it is
used for logos.
Advantage Can be scaled big or
small & have no loss in
definition. It can
contain both vectors &
bitmap.
Disadvantage Some formats may not
open wmf’s or open
them up as a different
file type.

14. File Format Capture
and Optimising

15. Compression
Definition Compression is the reduction in size of a
file/image which cuts down the time to
download & saves space.
Advantage It reduces the time to download images
from the internet, but also saves a lot of
memory space.
Disadvantage You may need to decompress all of your
previous data.

16. Image Capture
Method Scanner
How is it used for image capture of
graphics
It digitalises images like sketches.
Method Camera
How is it used for image capture of
graphics
It is used by taking photographs which can
be printed into pictures.
Method Graphics Tablet
How is it used for image capture of
graphics
Control the mouse like a pen for enhanced
control for drawing.

17. Optimising
Why would you optimise? You would optimise to make images
small, to reduce the bit depth (refers to
bits used regarding colours of pixels) & to
reduce the resolution.
How can you optimise? “the fewer bytes the browser has to download, the less
competition there is for the client's bandwidth and the faster
the browser can download and render useful content on the
screen.” https://developers.google.com/web/fundamentals/performance/optimizing-content-
efficiency/image-optimization. Optimising will happen if
you upload images to the web.
Advantage to optimising Reduces file size, making it easy to
download them. All images uploaded to
the web are optimised.
Disadvantage to optimising Images not optimised have large file sizes.
Larger the file size, longer to download.
No more than 500 pixels wide.