Unit 7 web graphics design
#graphics file format
Image file format provide a
standardized method of organizing and storing image data .image file are made up of either pixel or
vector (geometric data ) which is rasterizes to pixel in the display process .the
pixel that are make up on image are in
the form of gird of column and rows .Each pixel in an image consist of number
representing brightness and color
JPEG (joint
photographic experts group)
v It is a one the most popular formats for web graphics that use the lossy
compression technique . it support 24
bits of color information and it most commonly used for photographics .JPEG
file format stored all the color information in RGB image
B.GIF
(graphics interchange format)
v The format support 8 bits of color
information or less .the GiF format support animation and is effect .it also user a lossless compression
that is more effective when when large
have a single color and ineffective for
detailed image
B (BMP)
bitmap
The bit map file format
is used for is bitmap graphics on window plate form only .unlike other
file format the BMP format storage image data form bottom to top and pixel in
bluelgreenred other .the main advantage
BMP files is either wide acceptance ,simplicity and use in window
program
D TIFF(tag interchange file format );
1. It is a tag based format that was develop and maintain by adove
2. It is compatible for a widely range of software application can be used
across plate form such as macintosh window
and unix . the GIF or GPEG file TIEE can be lossy or losess
E PNG (portable network graphics)
PNG file format support turn color
(16 million color) . the losses PNG file format is
expecded to become a mainstream format for web
image , it is plate form i ndependent and should be used for signal
image only (not animation ).(PNG) offer greater color support and better
compression better support to transparence .
Prepare by labaraj bhattarai
More information www.labaraj
bhattarai.blogspot.com
