Sep
30
How PNG Works
How PNG Works
Portable Network Graphics (PNG) format is a lossless image format that uses a GZIP style compressor to make its data smaller. Since the image format is lossless, the compressed image quality will be identical to your source image. This is great since you can get high quality while still getting some compression, but not nearly as much as with lossy formats.
One of the biggest attractions of PNG is that it supports transparency. In addition to the red, green, and blue channels, it supports an alpha channel that defines which pixels to alpha-blend during rendering. This transparency support makes PNG quite attractive to the web, and to applications where you may want an image on screen that isn’t exactly rectangular.
Portable Network Graphics (PNG) format is a lossless image format that uses a GZIP style compressor to make its data smaller. Since the image format is lossless, the compressed image quality will be identical to your source image. This is great since you can get high quality while still getting some compression, but not nearly as much as with lossy formats.
One of the biggest attractions of PNG is that it supports transparency. In addition to the red, green, and blue channels, it supports an alpha channel that defines which pixels to alpha-blend during rendering. This transparency support makes PNG quite attractive to the web, and to applications where you may want an image on screen that isn’t exactly rectangular.