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Outline

JPEG2000: The upcoming still image compression standard

2000, Proceedings of the 11th …

Abstract

With the increasing use of multimedia technologies, image compression requires higher performance as well as new features. To address this need in the specific area of still image encoding, a new standard is currently being developed the JPEG2000. It is not only intended to provide rate-distortion and subjective image quality performance superior to existing standards, but also to provide functionality that current standards can either not address efficiently or not address at all. Lossless and lossy compression, encoding of very large images, progressive transmission by pixel accuracy and by resolution, robustness to the presence of bit-errors and region-of-interest coding, are some representative examples of its features. It is interesting to note that JPEG2000 is being designed to address the requirements of a diversity of applications, e.g. Internet, colour facsimile, printing, scanning, digital photography, remote sensing, mobile applications, medical imagery, digital library and Ecommerce.

FAQs

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What are the key features of the JPEG2000 image compression standard?add

JPEG2000 introduces features such as scalability, region-of-interest coding, and error resilience, enhancing compression performance. It is particularly suited for applications in medical imagery, remote sensing, and digital libraries.

How does JPEG2000 perform compared to earlier JPEG standards?add

Comparative analysis reveals JPEG2000 can compress images nearly twice as efficiently as traditional JPEG at similar PSNR quality. For instance, JPEG2000 significantly preserves quality while compressing at 0.125 bpp versus JPEG's performance.

How does the architecture of JPEG2000 differ from other compression methods?add

JPEG2000 employs a wavelet transform for encoding, which enables both lossy and lossless compression. This architecture also supports independent coding of image tiles, providing enhanced scalability and error resilience during transmission.

What implications does the JPEG2000 standard have for bandwidth and transmission?add

JPEG2000's scalability allows different resolutions to be decoded simultaneously, optimizing bandwidth usage. Its error resilience features ensure stable communication over various channels, essential for internet and remote applications.

What is the significance of region-of-interest (ROI) coding in JPEG2000?add

ROI coding enables specific areas of an image to be encoded with higher quality, enhancing overall fidelity. This feature can increase bitrate by 1 to 8% during lossless compression compared to non-ROI methods.

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