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Overview
Portable Network Graphics (PNG) is a bitmapped 
image format that employs lossless data compression . PNG was created to improve upon and replace GIF (Graphics Interchange Format) as an image-file format not requiring a patent license. It is pronounced /ˈpɪŋ/ [a] ping , or pee-en-jee . PNG supports palette-based (palettes of 24-bit RGB or 32-bit RGBA colors), greyscale , greyscale with alpha , RGB, or RGBA images. PNG was designed for transferring images on the Internet, not for print graphics, and so does not support non-RGB color spaces (such as CMYK ). [1]
In computing, JPEG (pronounced ˈdʒeɪpɛɡ , jay-peg ) is a commonly used method of lossy compression for photographic images. JPEG typically achieves 10:1 compression with little perceptible loss in image quality. JPEG compression is used in a number of image file formats . JPEG/Exif is the most common image format used by digital cameras and other photographic image capture devices. [2]
JPEG 2000 is an image compression standard and coding system. It was created by the Joint Photographic Experts Group committee in 2000 with the intention of superseding their original discrete cosine transform -based JPEG standard (created in 1992) with a newly designed, wavelet -based method. The standardized filename extension is .jp2 for ISO /IEC 15444-1 conforming files and .jpx for the extended part-2 specifications, published as ISO/IEC 15444-2.[3][4]
Raster, Vector & CGI Overview
REFERENCES
1. ^ From: Drupal - Wikipedia, the free encyclopedia.
a. ^ “Licensing FAQ” . drupal.org. Retrieved 2010-07-28.
b. ^ “The Drupal Overview” . drupal.org. Retrieved 2010-07-28.
c. ^ “System Requirements” . drupal.org. Retrieved 2010-07-28.
d. ^ The State of Drupal 2010 speech
e. ^ Lincoln (2008-09-24). “45 Sites You May Not Have Known Were Drupal-based” . Social CMS Buzz. Retrieved 2010-07-28.
f. ^ “Modules” . drupal.org. Retrieved 2010-07-28.
g. ^ “Features” . drupal.org. Retrieved 2010-07-28.
h. ^ From: “History” . drupal.org. Retrieved 2010-07-28.
