span load if are not used correctly.
class="cap">I nterne The basics for using graphic
t is making major strides. files are simple, just knowledge
his is not the case of graphic on graphic formats, even
formats of web pages. At present slightly, will help us design
we are still making use of old sites nicely and fastest.
graphic formats like GIF and
So let’s analyze the 3
JPEG, although they are useful, graphics formats in more
do not have the characteristics detail:
that the new standards, as
1- The GIF graphic format.
P-JPEG, PNG or SVG, may offer.
It is an acronym for the
In this article I will show you 3 phrase "Graphics Interchange
current graphic formats that Web Format".
pages should use, not to mention
This is a graphic file format
what the future comes to bring in that is commonly used to display
this regard.
images indexed by colour in the
The graphic component of the Wold Wide Web. This format is
web sites is very important used by its high-capacity
because it allow us to apply our compression of the information of
creativity to design sites as a an image.
pleasant task. It is also a tool
It was developed in 1987
to show the visitor a graphic (GIF87) CompuServe solution for
piece that in some cases “could sharing images across platforms.
worth as much as a million of He was subsequently revised in
words”, but it is also 1989 generating the new version
responsible for serious errors in GIF89a.
the web design; and in some cases
The GIF format is limited to a
can be a martyrdom for a visitor maximum of 256 colours. GIF is a
as the same graphic piece could compressed format designed to
“worth a million of seconds” to minimize the time to transfer
files through standard telephone in photographs where there are
lines. Use LZW method to achieve more than 256 colours.
compression ratios of
This format is typically used
approximately 1.5:1 to 2:1.
by digital cameras to store its
It is generally recommended images.
for simple images.
3- The PNG graphic format.
2- The JPG graphic format.
In response to the problems of
A format with a colour depth GIF format (essentially legal,
of 24 bits, that is permitted to but also technicians); a project
use up to 16.7 million colours was initiated through the
with variable compression that Internet to create a replacement.
may losses of image detail, the The result of this project was
compression level can be the PNG format.
specified. The JPG image is not
The initial mean Portable
allowed to use Network Format (PNG), and is the
transparencies.
youngest of these three graphic
If you are going to display formats we have here. Precisely
the image on a web page you can this "youth" is the first and
use the method of gradual greatest flaw: PNG is completely
compression. This option displays unrecognizable by older
the image gradually, while browsers.
downloading the web browser,
In terms of its graphics
using a series of lectures to capability is not at all bad:
show increasingly detailed Supports colour depth up to 24
versions of the entire image, bits (16.7 million colours), uses
until it had downloaded all the a system called LZ77 compression
data. However, the JPEG images without losing quality when you
progressive need more RAM for reduce the size of the files ,
display and not all Web browsers anyway if you reduce the image
support them. It is commonly used depth you can reduce further the
size of the files. border-color: #FFFFFF;
PNG has a number of background-color: #F5F7FB;
characteristics that it really border-left: #BAC9FF 1px solid;
becomes into an attractive one. border-right: #BAC9FF 1px solid;
In fact is a completely free margin-top: 5px; margin-bottom:
format, so anyone can implement 10px;" valign="top"
it in their programs or use it align="center">
freely, in the way you want
without paying royalties to anyone.
type="text/javascript">
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Article Tags: formats, graphic, web
