Portable Network Graphics

Portable Network Graphics (PNG /ˈpɪŋ/) 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 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.

History and development

The motivation for creating the PNG format was in early 1995, after it became known that the Lempel–Ziv–Welch (LZW) data compression algorithm used in the Graphics Interchange Format (GIF) format was patented by Unisys. There were also other problems with the GIF format that made a replacement desirable, notably its limit of 256 colors at a time when computers able to display far more than 256 colors were becoming common.

PNG

PNG usually refers to:

PNG may also refer to:

Fang (surname)

Fang (/fɑːŋ/, Chinese: 方) is the 47th most prevalent Chinese surname. In Chinese, Fāng (方), means "square" or "four-sided". Fāng (方) is pronounced Fong in Cantonese, Hong or Png in some Min Nan dialects and Png or Pung in Teochew.

Some more uncommon surnames that are also conventionally simplified to "Fang" in English are Fáng (房), meaning "house", and Fāng (芳), meaning "fragrant".

Etymology

During Emperor Huang Di's reign, a descendent called Yu Lei was awarded the land of Fang (north west of Nanyu) for his contributions in defeating a foreign tribe. He was thus known as Fang Lei, and his descendants were given the family name Fang.

Ji Yuan is considered as another forefather of the Fangs. Ji was a general of Zhou Xuan Wang, and was known for his contributions in conquering the north and the south. Since his nickname was Fang Shu, the king awarded him the family name of Fang.

People with the surname

Unspecified

方 (Fāng)