Portable Network Graphics (PNG) is a raster graphics file format that supports lossless data compression. PNG was created as an improved, non-patented replacement for Graphics Interchange Format (GIF), and is the most widely used lossless image compression format on the Internet.
PNG supports palette-based images (with palettes of 24-bit RGB or 32-bit RGBA colors), grayscale images (with or without alpha channel), and full-color non-palette-based RGB[A] images (with or without alpha channel). PNG was designed for transferring images on the Internet, not for professional-quality print graphics, and therefore does not support non-RGB color spaces such as CMYK.
PNG files nearly always use file extension PNG or png and are assigned MIME media type image/png. PNG was approved for this use by the Internet Engineering Steering Group on 14 October 1996, and was published as an ISO/IEC standard in 2004.
When You Need PNG Images For Professional Use, Are They Scalable Enough ?
Sourced through Scoop.it from: www.vectorgraphicsindia.com
Since, your PNG file has limited pixels; you can’t really scale up or zoom in unlimited. Actually, when you try to scale up, the pixels come visible as you see in the image. But it doesn’t happen with the vector files. Vector images are based on mathematical term, when you scale up a Vector file the mathematical term stays the same. It renders the same visual graphics no matter what the file size is. Vector images can be scaled up at any range without losing the quality. When you convert PNG to Vector, you get the chance to scale up your PNG image to whatever extent you wish. PNG to Vector is generally performed through powerful software like Adobe Illustrator, CorelDraw etc. There are also some automated software and online application to convert PNG to Vector, but the result image doesn’t come same quality as the image which is manually converted through illustrator.