JPEG XT

JPEG XT
Developed by	Joint Photographic Experts Group
Initial release	June 8, 2015; 9 years ago
Type of format	lossy and lossless image format
Standard	ISO/IEC 18477
Website	www.jpeg.org/jpegxt/

JPEG XT (ISO/IEC 18477) is an image compression standard which specifies backward-compatible extensions of the base JPEG standard (ISO/IEC 10918-1 and ITU Rec. T.81).

JPEG XT extends JPEG with support for higher integer bit depths, high dynamic range imaging and floating-point coding, lossless coding, alpha channel coding, and an extensible file format based on JFIF. It also includes reference software implementation and conformance testing specification.

JPEG XT extensions are backward compatible with base JPEG/JFIF file format - existing software is forward compatible and can read the JPEG XT binary stream, though it would only decode the base 8-bit lossy image.^[1]

^ Thomas Richter; Alessandro Artusi; Touradj Ebrahimi (2016). "JPEG XT: A new family of JPEG backward-compatible standards" (PDF). IEEE MultiMedia. 23 (July/Sept 2016): 80–88. doi:10.1109/MMUL.2016.49.

[IEEE_MM_richter-1] Thomas Richter; Alessandro Artusi; Touradj Ebrahimi (2016). "JPEG XT: A new family of JPEG backward-compatible standards" (PDF). IEEE MultiMedia. 23 (July/Sept 2016): 80–88. doi:10.1109/MMUL.2016.49.

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