Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
Compression can be translated as minimizing
of digital information. There are two major types
of compression: Lossy and Non-Lossy compression.
Compression is most used in raster and meta images,
not often in vector images.
Lossy Compression
An image processing software will remove information
that it more or less redundant to the human eye.
The advantage with lossy compression is that it
gives a very high degree of compression. The compression
is often 5–30 times. The disadvantage is that
the original information will be lost. A format
that uses lossy compressions is JPEG.
JPEG - The compression method used in the format
with the same name.
Non-Lossy Compression
When you use a non-lossy compression algorithm
all original information will be saved in the image.
The disadvantage is that the compression ratio is
much lower. The compression for a grey scale image
is often about 50% and for a black & white image
much higher.
Formats that uses on non-lossy compressions are
GIF and BMP.
LZW – Lempel-Ziv-Welch
RLE – Run length Encoding
Packbits – Compress black & white TIFF
images.
Group 3 – This compression method who compress
black & white TIFF images is based on the CCITT
group 3 fax standard.
Group 4 – Same as Group 3 but improved compression
rate.
Sponsored Links
Featured Firms of the Month
About
Logo Design
We specializes in internet designs to assists
your company in creating a positive first impression
on the internet.
Link
Experts Link Experts provides the only online
advertising solution that improves advertiser
search engine rankings while delivering click-through
traffic and branding.
About
Logo Design
A custom brochure is a classic example of effective
marketing on a budget. Let serious clients know
what your company stands for with a clean and
targeted company brochure design.
