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JPEG 2000

With JPEG 2000, Joint Photographics Expert Group (JPEG), the International Standards Organization( ISO) standardized an improved JPEG format in 2001. JPEG 2000 is characterized by higher compression rates compared to the classic JPEG, by the improved image quality the reduction of artifacts. Large, monochrome areas are only roughly resolved in JPEG 2000 and converted into a few bits.

For compression, JPEG 2000 uses the lossy WI file format with two subimages. In addition to lossy compression, there is also lossless compression.

Characteristics of JPEG 2000

Characteristics of JPEG 2000

The compression method used by JPEG 2000 works like other compressions with transformation, subsequent quantization and encoding. For the transformation, JPEG 2000 applies the wavelet transform( WT), with the principle of small waves. As color models JPEG 2000 uses the RGB and the CMYK color model or grayscale representation. The color depth is 8 or 16 bits per color channel. However, JPEG 2000 has no alpha channel for transparent representations.

Image data formats

Image data formats

JPEG 2000 is interesting for all applications in which extensive image files and large image file formats must be stored and processed, since the procedure is characterized by an enormous compression. For example, a bitmap file of 1.5 megabytes( MB) has about 40 kilobytes( KB) in JPEG and only 2 KB in JPEG 2000. JPEG 2000 is used in digital cinemas and in medical technology.

The file extension for JPEG 2000 is *.jp2.

Informations:
Englisch: JPEG 2000
Updated at: 24.04.2013
#Words: 210
Links: joint photographics expert group (JPEG), international organization for standardization (ISO), compression, image, monochrome
Translations: DE
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