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In addition, transparency is often an "extra" for a graphics format, and some graphics programs will ignore the transparency. Animated PNG 8-bit transparency. Raster file formats that support transparency include GIF, PNG, BMP, TIFF, TGA and JPEG 2000, through either a transparent color or an alpha channel.
On small images, GIF can achieve greater compression than PNG (see the section on filesize, below). On most images, except for the above case, a GIF file has a larger size than an indexed PNG image. PNG gives a much wider range of transparency options than GIF, including alpha channel transparency.
Portable Network Graphics (PNG) was designed as a replacement for GIF in order to avoid infringement of Unisys' patent on the LZW compression technique. [42] PNG offers better compression and more features than GIF, [59] animation being the only significant exception.
Animated Portable Network Graphics (APNG) is a file format which extends the Portable Network Graphics (PNG) specification to permit animated images that work similarly to animated GIF files, while supporting 24 or 48-bit images and full alpha transparency not available for GIFs.
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Category:Images with inappropriate JPEG compression: 1,842 2,341 Category:Images which should be in PNG format: 445 218 Category:Images with watermarks: 238 109 Category:Wikipedia non-free file size reduction requests: 1,027 104 Category:Wikipedia files that transclude the Non-free media rationale template with no Purpose specified: 432 0
(Click on the image to access the actual 512×512px standard test version.) Lenna (or Lena ) is a standard test image used in the field of digital image processing , starting in 1973. [ 1 ] It is a picture of the Swedish model Lena Forsén , shot by photographer Dwight Hooker and cropped from the centerfold of the November 1972 issue of Playboy ...
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