JPG/JPEG: Joint Photographic Experts Group
JPEG is usually known as JPG. It stands for Joint Photographic Expert Group, a joint working group of International Standardization Organization (ISO) and International Electrotechnical Commission (IEC). It is a standard method of compressing graphic images. It is used most often with its file name extension .jpg or .jpeg. It is generally used to compress digital images. It is a lossy compression technique because some information is lost while compression. It can reduce up to 5% of the actual size with the loss of some information.
JPEG is mostly used to send photographs on the internet because of its great compression technique. It supports a maximum image size of 65535×65535 pixels. JPEG file format is supported on the World Wide Web with the file suffix “.jpg”. It is also used as a term for any graphic image file created by using a JPEG standard.
Important features of JPEG
- JPEG was developed by Joint Photographic Experts Group.
- It can be converted to many formats.
- Mostly used extensions for JPEG format is: .jpeg, .jpg, .jpe, .jif, . jfif
- JPEG compresses an image into a stream of bytes and can also decompress back into an image. JPG standards specify the codec which defines how the image is compressed into stream of bytes and decompressed back into an image.
- The data format is independent from resolution, image contents and aspect ratio.
- The JPEG scheme has 29 distinct coding processes.
- JPEG file format is specified in ISO standard 10918.