Lossless JPEG is a 1993 addition to JPEG standard by the Joint Photographic Experts Group to enable lossless compression. However, the term may also be used to refer to all lossless compression schemes developed by the group, including JPEG 2000, JPEG-LS and JPEG XL.
Lossless JPEG was developed as a late addition to JPEG in 1993, using a completely different technique from the lossy JPEG standard. It uses a predictive scheme based on the three nearest (causal) neighbors (upper, left, and upper-left), and entropy coding is used on the prediction error. The standard Independent JPEG Group libraries cannot encode or decode it, but Ken Murchison of Oceana Matrix Ltd. wrote a patch that extends the IJG library to handle lossless JPEG.[1] Lossless JPEG has some popularity in medical imaging, and is used in DNG and some digital cameras to compress raw images, but otherwise was never widely adopted. Adobe's DNG SDK provides a software library for encoding and decoding lossless JPEG with up to 16 bits per sample.
ISO/IEC Joint Photography Experts Group maintains a reference software implementation which can encode both base JPEG (ISO/IEC 10918-1 and 18477-1) and JPEG XT extensions (ISO/IEC 18477 Parts 2 and 6-9), as well as JPEG-LS (ISO/IEC 14495).[2]
^Murchison, Ken (April 4, 1999). "Lossless JPEG support for libjpeg". Newsgroup: comp.protocols.dicom. Usenet: 372618DE.969A19D9@oceana.com. Retrieved December 12, 2017. A number of people have been interested in my patch which adds lossless JPEG support (per the original spec -- not JPEG-LS) to libjpeg v6b. I have decided to make this patch available via my ftp site (ftp://ftp.oceana.com/pub/ljpeg-6b.tar.gz).{{cite newsgroup}}: External link in |quote= (help)
lossless compression schemes developed by the group, including JPEG 2000, JPEG-LS and JPEG XL. LosslessJPEG was developed as a late addition to JPEG...
Like the LosslessJPEG standard, the JPEG 2000 standard provides both lossless and lossy compression in a single compression architecture. Lossless compression...
Free Lossless Image Format (FLIF) is a lossless image format claiming to outperform PNG, lossless WebP, lossless BPG and losslessJPEG 2000 in terms of...
Viewer using "Lossless Crop to File" and "JPEGLossless Rotate". XnViewMP using "JPEGlossless transformations". ACDSee supports lossless rotation (but...
JPEG XL is a royalty-free raster-graphics file format that supports both lossy and lossless compression. It is designed to outperform existing raster...
ratios in comparison to JPEG for encoding an image with equivalent quality. Lossless compression JPEG XR also supports lossless compression. The signal...
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...
but JPEG files suffer generational degradation when repeatedly edited and saved. (JPEG also provides lossless image storage, but the lossless version...
programs supporting JPEGlossless transformation functions based on the IJG code are given on the Lossless Applications List. The JPEG implementation of...
by Google intended as a replacement for JPEG, PNG, and GIF file formats. It supports both lossy and lossless compression, as well as animation and alpha...
JPEG XS (ISO/IEC 21122) is an interoperable, visually lossless, low-latency and lightweight image and video coding system used in professional applications...
JPEG XR, a successor of JPEG with support for high-dynamic range, wide gamut pixel formats (lossless or lossy compression) Wavelet compression JPEG 2000...
lossy or lossless. Lossless compression reduces bits by identifying and eliminating statistical redundancy. No information is lost in lossless compression...
either in lossless PNG format or in lossy JPEG format. This way, users can benefit from the power of JPEG compression while preserving lossless (PNG-compressed)...
DEFLATE, a lossless compression algorithm developed by Phil Katz and specified in 1996, is used in the Portable Network Graphics (PNG) format. The JPEG 2000...
compression is performed. Huffyuv's algorithm is similar to that of losslessJPEG, in that it predicts each sample and then Huffman-encodes the error...
sharpening and noise reduction JPEG images are typically saved using a lossy compression format (though a losslessJPEG compression is now available)....
support. This enables reading and writing to a variety of formats, including JPEG, JPEG2000, Apple Icon Image format, TIFF, PNG, PDF, BMP and more. SView5...
data can be compressed using a variety of standards, including JPEG, losslessJPEG, JPEG 2000, and run-length encoding (RLE). LZW (zip) compression can...
employs lossless and lossy data compression. PGF was created to improve upon and replace the JPEG format. It was developed at the same time as JPEG 2000...
within the FFmpeg project so far. The two video codecs are the lossless FFV1, and the lossless and lossy Snow codec. Development of Snow has stalled, while...
the PNG format can compress image data more than JPEG can. Additionally, PNG is lossless, while JPEG produces visual artifacts around high-contrast areas...
image data in a lossless format makes a TIFF file a useful image archive, because, unlike standard JPEG files, a TIFF file using lossless compression (or...
Efficient & Lossless Image Compression System, is a lossless image compression algorithm that performs 5-times faster than the original losslessJPEG codec...
Global Information