HTML5, CSS3, and JavaScript Fourth Edition

(Ben Green) #1

CHAPTER 41. CH38 CODECS: CODING AND DECODING 314


was developed in part to overcome the patent issues with GIF encoding.


PNG providestransparency. Transparency allows for images that do not
appear to be rectangular.


http://en.wikipedia.org/wiki/Portable_Network_Graphicshas more.


SVG: Scalable Vector Graphics


SVGstands for Scalable Vector Graphics. Codings like GIF, JPEG, and
PNG, are calledraster graphicsand reflect individual pixels in the image.
SVG usesvector graphicsreflects whole lines rather than individual pixels.
As a result, the image does not degrade and pixelate when it is expanded
(when you zoom in).


http://en.wikipedia.org/wiki/Svghas more.


TIFF: Tagged Image File Format


TIFFstands for Tagged Image File Format. It is popular among publishers
and other high-end users because it retains more information than jpeg and
other raster formats do. File sizes also tend to be much larger than for jpeg.


High-end cameras tend to record their images in β€œraw” formats which are
similar to TIFF.


Because TIFF files are huge in comparison to JPG and other formats, TIFF
is not commonly used on the webpages.


http://en.wikipedia.org/wiki/Tagged_Image_File_Formathas more.

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