2. Raster Graphics
• Give a definition of Raster Graphics
• Most pictures you see on your computer screen are raster graphics, pictures you
import from the web and digital cameras, pictures you put on social media, there
all raster graphics. Raster graphics are digital images which can be created or
captured. What I mean by this is that they can be created by scanning a photo.
The images have a real looking effect, unlike vector graphics. Raster files are
usually larger than vector files. They include image file types like GIF and JPEG.
Raster graphics are made up of a grid of pixels, there are sometimes referred to as
Bitmap. This is because when you zoom in on the photos they start to look
pixelated. JPEG and GIF help to compress the images.
Here you see a raster
graphic, and how it looses
quality as each individual
pixal breakes apart from
the image as you zoom in.
It looses quality.
3. Vector Graphics
• Vector graphics are made up of objects, this allows individual objects on the image to be edited for
example, change the size, position, colour, shape etc. Unlike raster graphics, the file sizes of vector
images are quite small, and they don’t loose quality and definition when they are edited/resized.
They are able to be scaled to new sizes without loosing quality because they aren’t made up of a
specific number of dots. Vector Graphics sometimes look like cartoon images.
• Vector graphics are often used for company logos, as they need to be scaled to different sizes.
When you zoom in on a vector image the edges on the object will stay smooth and clean.
Here shows an exaple
of vector graphics in
practice. You see the
comparison between
a vector graphic and a
bitmap. It shows how
the graphics change.
You can see every
pixal on the bitmap
where as the vector
graphic dosent loose
quality as you zoom
in.
5. JPEG
Stands For
Used For/Example Joint photographic experts group (Jpeg)
images are usually used when putting
images up onto the internet/social media
sites. Jpeg images are also used for
compression.
Advantage The advantages of using JPEG images is
that they are great for quality
photographs, artwork, advertisement
etc... JPEG images give you a full colour
resolution. JPEG images also help
compress large files, which gives a shorter
transfer times.
Disadvantage JPEG images can break apart and start to
look pixelated when you zoom in on the
image. As well, JPEG images do not
support transparency.
6. TIFF
Stands For
Used For/Example TIFF is a format which supports raster
graphic images. It is popular among the
publishing industry and photographers.
Advantage TIFF is a recognised format by most
computers. Uncompressed images keep
the full amount of image data from the
camera.
Disadvantage Most websites and online galleries do not
allow uploads from TIFF formats, most
likely due to their slow uploads. Because
of how large the files are.
7. GIF
Stands For
Used For/Example The graphics interchange format (GIF) is
the second most common image format in
the world after JPEG. It is a file type which
allows you to use a series of separated
frames and put them in order to make an
animation. It is used on social media sites
like Facebook, where you can exchange
GIFS on messenger.
Advantage There are several advantages to GIFS, one
being that they are relatively small file
sizes, which means they can be used
quickly online. GIFS also have transparent
backgrounds, which therefore can show a
professional look on websites.
Disadvantage GIFS are dependant on the internet
connection, they should run smoothly
online but they need connection to do so.
Another negative is that they have a
maximum colour pallet of 256 colours, so
they sometimes don’t look as good as
other image file types like JPEG.
8. BMP
Stands For
Used For/Example BMP is a raster graphic file used to store
bitmap digital images. It is used on
Microsoft windows.
Advantage They are easily created by existing pixel
data. Pixel values may be modified
individually or in large groups by altering a
palette.
Disadvantage The drawbacks are that the file sizes are
often very large, especially if there's a lot
of colours. Also, the images themselves do
not scale well, shrinking the image can
effect the image in a way that will damage
the quality of the image. Because the
pixels are being thrown away.
10. PSD
Stands For
Used For/Example PSD files is created by adobe for its uses in
Photoshop. Photoshop uses PSD files for
saving data.
Advantage It is ideal for processing images when you
want to save the file and go back to it at a
later point.
Disadvantage PSD files are generally only recognized by
Photoshop and some other photo
manipulation formats, which limits what
you can use it for.
11. AI
Stands For
Used For/Example AL is a file format used in adobe illustrator
drawing. Company’s may use this for
logo’s.
Advantage The images do not loose quality or
definition when rescaled and resized.
Disadvantage AI files need a specific software to actually
open the file, therefore this limits when
and what you can view the file on.
12. FLA
Stands For
Used For/Example FLA files are used by the Adobe flash
application. They are used when you
might be making an animation in flash,
you would save it as a FLA.
Advantage Using it can create good animations using
vectors or imported bitmaps, and it allows
scripting, sound and video. Flash
Disadvantage FLA can cause problems if your connection
is weak, and the file will not work if the
user has flash content blocked.
14. WMF
Stands For
Used For/Example WMF is a file extension for a graphics file
with Microsoft windows. It is most
commonly used for designing artwork.
Advantage It allows compression of large files wihout
loosing quality of the image. It is
supported on various portable video
devices and streaming media clients.
Disadvantage The biggest disadvantage with WMF is its
non compatibility with non-windows
platforms.
15. Compression
Definition File compression is used to reduce the
size of one or more files.
Advantage The advantages of file compression are
that files transfer faster, there is less disk
space, and it provides faster writing and
reading for viewers.
Disadvantage The disadvantages are that compressing
files adds complication, there are errors in
the process of transmission.
16. Image Capture
Method Scanner
How is it used for image capture of
graphics
Scanners can be used to convert images or
text on paper into a digital format which is
compatible with the computer.
Method Camera
How is it used for image capture of
graphics
Camera’s are used to capture images by
snapping shots of still images digitally.
They are automatically saved as JPEG.
Method Graphics Tablet
How is it used for image capture of
graphics
A graphics tablet is a device which allows
users to hand draw images, animations
and graphics. It is as similar as it could get
to real real drawing with a pencil and
paper.
17. Optimising
Why would you optimise? People would optimising to compress
certain images in JPEG and PNG formats
to the minimum possible size.
How can you optimise? You can optimise by saving images as
JPEGs or GIFs.
Advantage to optimising Image optimisation provides many
benefits like, free product promotion. The
optimised images show up in search
engines like Google, Yahoo, Google images
etc.
Disadvantage to optimising The disadvantages of optimising is that it
is more difficult to find posts that have
been published at an earlier date, and all
the effects of branding and visual styles
are not shown.
19. File Size
What could affect a Working Scale
(Photoshop) document file size?
Compressing a file by exporting the file as
a certain file type could affect the
documents file size. For example using
Jpeg would make the file size alot smaller
by compressing it. Users may also
optimize the file so it is the minimum
possible size.
How could you reduce the file size of a
Working Scale document without
affecting quality?
Saving a file as an AI file reduces the size
of the file without it loosing quality. If you
were to save the file as a Jpeg the file
would loose quality and as you zoom into
the picture the image would break apart
and become pixelated.
What is an advantage of scaling up
images before exporting?
Because it allows you to change the size of
the image. Smallen it without loosing
quality because the image is already big,
you dont need to worry about its quality.
What is a disadvantage of scaling up Its hard to find files that will support this
20. File Naming Conventions
What naming conventions could you use
when creating your video game assets?
I will make a large folder containing all of
my video game assets, with little
folders within it named for example
“animations” “characters”
“backgrounds” etc… Within them
smaller folders i will store all of my
content.
Why is it a good idea to accurately name
your assets?
So that finding my work is alot easier and
quicker. My files will be easier to find
which will allow me to continue with my
work quicker and to the best standard.
21. Asset Management
Why would you use folders when storing
your assets?
People would use assets because they are
resourceful, they allow you to place any
file you want in the folder.
What folders would you create and what
would you save within them
As i said in the previous slide, i would
create large folders where i wuld base
all of my content based on what the
document was. Where it was a
character, background, weapon, power
up or animation it would go in its own
folder containing them particular
documents.
