Pixels are the smallest controllable elements that make up images on screens. They are arranged in a grid and can only display one color at a time, but many clustered together can create a smooth image. Higher resolution screens have more and smaller pixels, making individual pixels harder to see. More pixel colors are possible with increased bit depth. In gaming, higher resolution screens and consoles allow for more detailed graphics through more pixels and colors. Vector images use geometric shapes defined by mathematical expressions rather than pixels, while raster images are made of pixels arranged in a grid. Different file formats like BMP, PNG, GIF are used for different purposes like photos, icons, or transparency. Digital asset management involves ingesting, storing, and distributing digital
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1. Pixel and Resolution
'Pixel' is short for 'Picture Element', Pixels are used in most electrical
screens such as computers or mobile phones, the screens are divided
into thousands and in some cases millions of pixels which can't be seen
from afar because they are so small which is useful as many coloured
pixels clustered together can create a smooth looking image which tricks
the eye.
If a computers screen would be '1366x768' taken from my own
computers resolution, it is difficult to stare at a point blank range and
notice the individual pixels, but on a '640x480' screen, it will be easier to
notice the pixels on the screen, this is because a '640x480' screen
contains 640 by 480 pixels all together which are larger and take up
more of the screen as a whole, making them more visible.
Pixels can only be one given colour at a time but being so small they can
combine together to make a smooth looking blend of colours.
The number of colours the pixels on a screen can be a determined by
the number of bits available, for example;
8 Bit - 256 Colours,
16 Bit (Also reffered to as High Colour)- - 65,536 Colours,
2. 24 Bit (Also Referred to as True Colour) - 16,777,216 Colours.
'http://en.wikipedia.org/wiki/Color_depth#True_color_.2824-bit.29'
http://en.wikipedia.org/wiki/Pixel
Where do pixels come of use in Gaming?
As you'll see in the mario timeline above, as Pixels became backed up
with higher bits in computers, more colours and more detailed graphics
became available over the years that the gaming industry became
increasingly popular, with the high spec consoles we have currently such
as Razer PC's, Microsofts' 'Xbox One' or the Sony 'PS4' we can
currently apply high amounts of graphic detail into a game without
overusing the capabilities of the consoles due to new engines and such.
Which is where more pixels can be combined together on high resolution
screens and high ‘bit’ consoles, making shading and realism much more
attainable?
3. Vector and Raster Images.
Raster images
A Raster image is made of
in computer graphics, a raster graphics image, or bitmap, is a dot matrix
data structure representing a generally rectangular grid of pixels, or
points of colour, viewable via a monitor, paper, or other display medium.
Raster images are stored in image files with varying formats.
Vector images
Vector graphics is the use of geometrical primitives such
as points, lines, curves, and shapes or polygon(s), which are all based
on mathematical expressions, to represent images in computer graphics.
Vector graphics are based on vectors (also called paths, or strokes)
which lead through locations called control points. Each of these points
has a definite position on the x and y axes of the work plan. Each point,
as well, is a variety of database, including the location of the point in the
4. work space and the direction of the vector (which is what defines the
direction of the track). Each track can be assigned a color, a shape, a
thickness and also a fill.
Raster and Vector images in Gaming
Vector game can also refer to a video game that uses
a vector graphics display capable of projecting images using an electron
beam to draw images instead of with pixels, much like a laser show.
Many early arcade games used such displays, as they were capable of
displaying more detailed images than raster displays on the hardware
available at that time. Many vector-based arcade games used full-colour
overlays to complement the otherwise monochrome vector images.
6. File formats and uses.
BMP-
Short for "Bitmap." It can be pronounced as "bump," "B-M-P," or simply a
"bitmap image." The BMP format is a commonly used raster graphic
format for saving image files. It was introduced on the Windows platform,
but is now recognized by many programs on both Macs and PCs.
The BMP format stores
colour data for each pixel in the image without any compression. For
example, a 10x10 pixel BMP image will include colour data for 100
pixels.
PNG-
PNG, which can be pronounced "ping" or "P-N-G," is a compressed
raster graphic format. It is commonly used on the Web and is also a
popular choice for application graphics.
Unlike the JPEG and GIF formats, the PNG format supports an alpha
channel, or the "RGBA" colour space. The alpha channel is added to the
three standard colour channels (red, green, and blue, or RGB) and
provides 256 levels of transparency. JPEG images do not support
transparent pixels and GIF images only support completely transparent
(not partially opaque) pixels
7. GIF-
The letters GIF stand for Graphics Interchange Format, a GIF is based
on indexed colours, which is a palette of at most 256 colours. This helps
greatly reduce their file size. These compressed image files can be
quickly transmitted over a network or the Internet, which is why you often
see them on Web pages. GIF files are great for small icons and
animated images, but they lack the colour range to be used for high-
quality photos.
TIFF-
Tiff stands for "Tagged Image File Format." It is graphics file format
created in the 1980's to be the standard image format across multiple
computer platforms. The TIFF format can handle colour depths ranging
from 1-bit to 24-bit. Since the original TIFF standard was introduced,
people have been making many small improvements to the format, so
there are now around 50 variations of the TIFF format.
8. .jpg
Also known as jpeg is a common method of ‘lossy compression’ for
digital images, mostly known for images made with digital photography
You can change the amount of compression, making choice between
storage size and the quality of image.
.psd
The file type used by Adobe Photoshop, a psd file can save all settings
previously used within the project, such as layers, changes to the image,
image masks etc
They can also be found as .psb which stands for ‘’photoshop big’’ due to
it being a large image, increasing the maximum height and width to
300,000 pixels.
.pdf
Portable document format, it is used to present documents from
applications such as word or presentation, to be shown on different
operating systems, software and hardware
9. .eps
PostScript (.PS) file that may contain 2D vector graphics, bitmap images,
and text; may also include an embedded preview image in bitmap
format; can be placed within another PostScript document.
EPS files are supported by several different drawing programs and
vector graphic editing applications. They are often used as a standard
means for transferring image data between different operating systems.
.ai
AI is a file extension for a vector graphics file format used in an Adobe
Illustrator drawing. Adobe Illustrator is a popular vector graphics-based
drawing program. The AI format is a strictly limited, highly simplified
subset of EPS.
10. Compression-
Compression is useful as it can reduce the overall number of bits and
bytes within a file so it can be transmitted faster over slow internet
connections and take up less space on a disk.
It takes programs (depending on the compression) such as Winrar to
expand the file back into its original size identical to before it was
compressed.
Image Capture Devices-
Image capture devices can include software which captures images
within the device, there are also devices dedicated to capturing images
such as Cameras, mobile phones etc.
Optimising-
Optimising an image requires getting the correct balance between
filesize and the quality of the picture
11. Storage and Asset Management-
“Digital asset management (DAM) consists of management tasks and
decisions surrounding the ingestion, annotation, cataloguing, storage,
retrieval and distribution of digital assets. Digital photographs,
animations, videos and music exemplify the target areas of media asset
management (a sub-category of DAM).
Digital asset management systems (DAMS) include computer software
and hardware systems that aid in the process of digital asset
management.
The term "digital asset management" (DAM) also refers to the protocol
for downloading, renaming, backing up, rating, grouping, archiving,
optimizing, maintaining, thinning, and exporting files.”
‘http://en.wikipedia.org/wiki/Digital_asset_management’