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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. It also retains backward compatibility with non-animated PNG files.
When converting an image from the PNG format to GIF, the image quality may suffer due to posterization if the PNG image has more than 256 colors. GIF intrinsically supports animated images. PNG supports animation only via unofficial extensions (see the section on animation, above). PNG images are less widely supported by older browsers.
The Graphics Interchange Format (GIF; / ɡ ɪ f / GHIF or / dʒ ɪ f / JIF, see § Pronunciation) is a bitmap image format that was developed by a team at the online services provider CompuServe led by American computer scientist Steve Wilhite and released on June 15, 1987.
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However, most animations were not intended to give a realistic representation and the distortion isn't very obvious in cartoonish pictures. The distortion and the flicker caused by the rotating slits are not seen in most phénakisticope animations now found online (for instance the GIF animation on this page).
A medical animation is a short educational film, usually based around a physiological or surgical topic, that is rendered using 3D computer graphics. While it may be intended for an array of audiences, the medical animation is most commonly utilized as an instructional tool for medical professionals or their patients.