JPEG-2000 - significado y definición. Qué es JPEG-2000
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Qué (quién) es JPEG-2000 - definición

IMAGE COMPRESSION STANDARD AND CODING SYSTEM
JPEG2000; JPEG-2000; .jp2; Jpeg2000; Jpeg 2000; Jpg 2000; Jpg2000; Jpg2k; JPG2k; Jpeg2; Jpeg2k; JPEG2k; JPEG2K; Jpeg2K; Jpeg 2k; JPEG 2k; JPEG 2K; Jpeg 2K; JPG 2000; JPG2000; JPG2K; JPG 2K; JPG 2k; Jpg 2k; ISO/IEC 15444; .jpm; Lossless JPEG 2000; JP2K; Jp2k; .jpx; EBCOT; .jpf; T.800; T.801; T.804; T.805; T.807; T.803; T.809; T.810; T.812; T.813; T.814; T.815; Image/jp2
  • Comparison of JPEG, JPEG 2000, [[JPEG XR]], and [[HEIF]] at similar file sizes.
  • Top-to-bottom demonstration of the artifacts of JPEG 2000 compression. The numbers indicate the compression ratio used.
  • An example of the wavelet transform that is used in JPEG 2000. This is a 2nd-level CDF 9/7 [[wavelet transform]].
  • This image shows the (accentuated) difference between an image saved as JPEG 2000 (quality 50%) and the original.
  • CDF]] 5/3 wavelet used for lossless compression

JPEG-2000         
<image, file format> A potential successor to JPEG with better compression and multiresolution images. JPEG-2000 gives reasonable quality down to 0.1 bits/pixel (JPEG quality drops dramatically below about 0.4 bits/pixel). (2001-12-02)
EBCOT         
Embedded Block Coding with Optimal Truncation (Reference: JPEG)
PJPEG         
  • Continuously varied JPEG compression (between Q=100 and Q=1) for an [[abdominal]] [[CT scan]]
  • The DCT transforms an 8×8 block of input values to a [[linear combination]] of these 64 patterns. The patterns are referred to as the two-dimensional DCT ''basis functions'', and the output values are referred to as ''transform coefficients''. The horizontal index is <math>u</math> and the vertical index is <math>v</math>.
  • Zigzag ordering of JPEG image components
  • 120px
  • 120px
  • 120px
  • 120px
  • 120px
  • The 8×8 sub-image shown in 8-bit grayscale
  • ''Baseline sequential'' JPEG encoding and decoding processes
  • An example of a stereoscopic .JPS file
  • The compressed 8×8 squares are visible in the scaled-up picture, together with other visual artifacts of the [[lossy compression]].
  • The original image
  • This image shows the pixels that are different between a non-compressed image and the same image JPEG compressed with a quality setting of 50. Darker means a larger difference. Note especially the changes occurring near sharp edges and having a block-like shape.
  • 100px
  • 100px
  • 100px
  • 100px
  • Visual impact of a jpeg compression on Photoshop on a picture of 4480x4480 pixels
CONFLATION OF MULTIPLE TOPICS INCLUDING COMPRESSION ALGORITHMS, VARIOUS FILE FORMATS, STANDARDS/TECHNICAL SPECIFICATIONS AND A NON-PROFIT ORGANISATION
JPG; Jpeg; Jpg; JPEG file format; .JPEG; .JPG; .jpg; JPEG Image; .jpeg; .jpe; Interlaced JPEG; JPE file; PJPEG; JPIG; Jaypeg; Image/jpeg; Minimum Coded Unit; ISO 10918-1; JPEG Interchange Format; Minimum coded unit; JPEG encoding; JPEG file; JPG file; JPEG image; T.81; Data compression/JPEG; .mpo; JPEG Stereo; Progressive JPEG; PJPG; P JPG; Multi-Picture Format; .jps; JPEG Stereoscopic; Still Picture Interchange File Format; .jif; JPEG film; JPEG format; JPEG compression; JPEG photo; JPEG picture; JPEG photograph; JPEG pic; JPEG pix; .pjp; .pjpeg; .jfi; .JFI; .PJPEG; .PJP; .JPE; .JIF; JPEG 1; JPEG-1; T.83; T.84; T.86; T.872; T.873

Wikipedia

JPEG 2000

JPEG 2000 (JP2) is an image compression standard and coding system. It was developed from 1997 to 2000 by a Joint Photographic Experts Group committee chaired by Touradj Ebrahimi (later the JPEG president), with the intention of superseding their original JPEG standard (created in 1992), which is based on a discrete cosine transform (DCT), with a newly designed, wavelet-based method. The standardized filename extension is .jp2 for ISO/IEC 15444-1 conforming files and .jpx for the extended part-2 specifications, published as ISO/IEC 15444-2. The registered MIME types are defined in RFC 3745. For ISO/IEC 15444-1 it is image/jp2.

JPEG 2000 code streams are regions of interest that offer several mechanisms to support spatial random access or region of interest access at varying degrees of granularity. It is possible to store different parts of the same picture using different quality.

JPEG 2000 is a compression standard based on a discrete wavelet transform (DWT). The standard could be adapted for motion imaging video compression with the Motion JPEG 2000 extension. JPEG 2000 technology was selected as the video coding standard for digital cinema in 2004. However, JPEG 2000 is still not widely supported in web browsers (other than Safari) as of 2022, and hence is not generally used on the World Wide Web.