JPEG Standard

A JPEG Standard is a digital image format that employs lossy compression techniques.

• Context:
  • It can (typically) be referenced by a JPEG Image File, such as a Lenna JPEG file.
  • It can (often) be adjusted in terms of compression level, allowing users to balance between storage size and image quality according to their needs.
  • It can be intended to reductions in file size with minimal perceptible loss in image quality (making it suitable for storing and transmitting photographic images over the internet).
  • It can support a maximum image size of 65,535×65,535 pixels, accommodating up to 4 gigapixels for an aspect ratio of 1:1.
  • ...
• Example(s):
  • JPEG 19__, ...
  • ...
  • JPEG/Exif, which is commonly used by digital cameras
  • JPEG/JFIF, prevalent on the World Wide Web.
  • JPEG 2000, a format intended to succeed the original JPEG standard but did not replace it.
  • ...
• Counter-Example(s):
  • PNG, a digital image format that uses lossless compression.
  • GIF, a format used for images with limited color palettes and for simple animations.
• See: Digital Imaging, Graphics Interchange Format, Image File Formats, Image Quality, Lossless Compression, Photographic Imaging Techniques, Portable Network Graphics, Raster Graphics, Visual Perception.

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References

• http://en.wikipedia.org/wiki/JPEG
• http://www.jpeg.org/
• AKA: JPEG.

2024

• (Wikipedia, 2024) ⇒ https://en.wikipedia.org/wiki/JPEG Retrieved:2024-4-7.
  • JPEG (short for Joint Photographic Experts Group) is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality. Since its introduction in 1992, JPEG has been the most widely used image compression standard in the world, and the most widely used digital image format, with several billion JPEG images produced every day as of 2015. The Joint Photographic Experts Group created the standard in 1992. JPEG was largely responsible for the proliferation of digital images and digital photos across the Internet and later social media. JPEG compression is used in a number of image file formats. JPEG/Exif is the most common image format used by digital cameras and other photographic image capture devices; along with JPEG/JFIF, it is the most common format for storing and transmitting photographic images on the World Wide Web. These format variations are often not distinguished and are simply called JPEG. The MIME media type for JPEG is "image/jpeg," except in older Internet Explorer versions, which provide a MIME type of "image/pjpeg" when uploading JPEG images. JPEG files usually have a filename extension of "jpg" or "jpeg". JPEG/JFIF supports a maximum image size of 65,535×65,535 pixels, hence up to 4 gigapixels for an aspect ratio of 1:1. In 2000, the JPEG group introduced a format intended to be a successor, JPEG 2000, but it was unable to replace the original JPEG as the dominant image standard.

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