JPEG 2000


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JPEG 2000

A standard for compressing still images from the Joint Photographic Experts Group. Introduced in 2000, JPEG 2000 uses wavelet compression and provides greater compression ratios than the discrete cosine (DCT) method used in regular JPEG. It also takes more processing power to decode the images. JPEG 2000 supports both lossy and lossless modes, and it is noted for its "visually lossless" appearance, whereby lossy images look so good that they appear to have been compressed with a lossless method. The millions of JPEG images on the Web are regular JPEG, not JPEG 2000.

Smart Decoding
A significant feature of JPEG 2000 is that images can be decoded into different resolutions, allowing, for example, a viewer to quickly render a low-resolution image from a gigantic file that would otherwise take considerably longer. Smart decoding enables the same image file to serve multiple uses.

Motion JPEG 2000
Motion JPEG 2000 is the video version of JPEG 2000. However, unlike other movie formats, which use interframe coding to compress multiple frames, each JPEG 2000 frame is compressed independently. Motion JPEG 2000 is the standard for the d-cinema format for digital movie theaters and is commonly referred to as simply "JPEG 2000."

JPEG 2000's smart decoding is also a major advantage for digital cinema. For example, although the movie may have been mastered in 4K resolution, it can be decoded and projected at 2K without having to decode into 4K first and then downconvert into 2K afterwards. This enables the same source file to be used in different theaters. See JPEG, MPEG, wavelet compression and digital cinema.
References in periodicals archive ?
From it, we can observe that the DMOS expresses positive correlation for the decreasing-type distortions such as white noise and Gaussian blur, while negative correlation is responded for the increasing-type distortions such as JPEG 2000, JPEG, and fast fading.
Figure 8 shows the comparison results with JPEG 2000. The first row in Figure 8 shows results of the proposed method and the second row presents JPEG 2000 results.
Banerjee, "An Efficient pass-parallel architecture for embedded block coder in JPEG 2000," IEEE Transactions on Circuits and Systems for Video Technology, vol.
The embedding is performed into JPEG 2000 image using unmodified scheme, presented in [19], when the annotation and the region of annotation (ROA) are not separated spatially.
SPIHT [2] is one of the most advanced schemes available, even outperforming the state-of-the-art JPEG 2000 in some situations.
(6) See JPEG 2000 standard: "JPEG 2000," International JPEG Committee, http://www.jpeg.org/jpeg2000/.
The institution will also deploy a JPEG 2000 image engine via DuraCloud to process and serve digital images.
a compression ratio of 37:1 but only using JPEG 2000
To check the robustness against Image Compression, the watermarked image is tested by JPEG and JPEG 2000 compression attacks.
Annex A4.4, for example, is dedicated to JPEG 2000 compression.
Other topics include a Langrangian formulation of fixed-rate quantization, error concealment for dual frame video coding with uneven quality, JPEG 2000 content analysis using codestream length information, and fast pre-computed VQ with optimal bit allocation for lossless compression of ultraspectral sounder data.
The Orion features dual on-board JPEG 2000 engines to support full-frame encoding or standard 625-line PAL or 525-line NTSC composite video.