Right now PNG is without doubt one of the most popular raster codecs on the Internet. In 1995 during Usenet convention it was recommended to develop this format as an alternative to the popular GIF format, that requires a license.
Advantages and disadvantages
– minimal compression loss. The image quality just isn’t changed by any compression ratio;
– format is suitable for storage of intermediate variations of the image. If you re-save image, quality shouldn’t be lost;
– PNG helps a large number of colors. PNG-8 (256 colors) and PNG-24 (about 16.7 million. Colors);
– it helps multi stage of transparency. Image has the 256 levels of opacity from totally opaque to fully transparent;
– it’s potential to work with layers;
– the ability to add to the file meta-knowledge;
– small size files.
– doesn’t help animation;
– ailing-suited for working with full-color images;
– cannot store multiple images in one file;
Now It turns into clear what caused the recognition of the PNG format among web designers. This is the only format that means that you can get images with a clear background.
For instance, it is rather essential for creating logos – it requires the presence of a clear background.
Learn how to use the PNG
In addition to the emblem, this format is used for creating the web pages navigation elements, engravings, lithographs, textual content, graphics, images with sharp edges. In short, wherever transparency, good compression, details and clear boundaries of the image are necessary.
PNG image is compressed with out high quality loss. Usually PNG are used for storing graphics with sharp edges, text graphics, graphic parts (logos, designs, icons).
The main advantage of the format PNG is storage and usage of intermediate enhancing stages. This is because of the truth that compression at any stage of conservation passes with none lack of quality.
The PNG format (pronounced “PING”) was designed to replace the antiquated GIF format, and to some extent, the TIFF format. It makes use of lossless compression, which means no image knowledge is lost when saving or viewing the image. It’s a common format that is recognized by the World Wide Web consortium, and supported by trendy web browsers.
The PNG format was developed when it was discovered by your entire development neighborhood in early 1995 that the GIF image format makes use of LZW compression, technology which was patented in 1985 by Unisys corporation. The preliminary builders of the GIF format, Compuserve, was not aware of this at the time of it’s development in 1987.
Now business and non-commercial software developers who’s utility supports the reading or writing of GIF or LZW TIFF images must pay substantial royalties and fees. In addition web builders who use any non-Microsoft utility to generate GIF images directly to a web server also need to pay comparable royalties and fees. The PNG format doesn’t have any patent restrictions and can be read and written freely by software builders and webmasters a like.
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