SEPTEMBER 2001 | Athanasios Skodras, Charilaos Christopoulos, and Touradj Ebrahimi
The JPEG 2000 standard is a new image compression standard developed to address the limitations of the older JPEG standard. It was introduced in response to the growing demand for more efficient, scalable, and interoperable image compression technologies. The JPEG 2000 standard is designed to provide superior performance in terms of bit-rate efficiency, scalability, and image quality, while also supporting a wide range of image types and applications. It is particularly well-suited for use in network and mobile environments, where bandwidth and processing power are limited.
The JPEG 2000 standard is based on a wavelet transform, which allows for more efficient compression of images compared to the discrete cosine transform (DCT) used in the JPEG standard. The wavelet transform is applied to the image data, and the resulting coefficients are quantized and entropy coded. This process allows for the creation of a bit stream that can be decoded to reconstruct the original image. The standard also supports region-of-interest (ROI) coding, which allows for the encoding of certain parts of an image at a higher quality than the rest of the image. This feature is particularly useful in applications where certain parts of the image are more important than others.
The JPEG 2000 standard also supports scalability, which allows for the creation of multiple layers of an image, each with different qualities and resolutions. This feature is particularly useful in applications where different levels of image quality are required, such as in medical imaging or remote sensing. The standard also supports error resilience, which allows for the recovery of images even if some parts of the bit stream are corrupted.
The JPEG 2000 standard is designed to be compatible with a wide range of hardware and software systems, and it is supported by a number of international standards organizations. The standard is also designed to be royalty-free, which makes it more accessible to a wider range of users and applications. Overall, the JPEG 2000 standard represents a significant advancement in image compression technology, offering improved performance, scalability, and interoperability compared to the older JPEG standard.The JPEG 2000 standard is a new image compression standard developed to address the limitations of the older JPEG standard. It was introduced in response to the growing demand for more efficient, scalable, and interoperable image compression technologies. The JPEG 2000 standard is designed to provide superior performance in terms of bit-rate efficiency, scalability, and image quality, while also supporting a wide range of image types and applications. It is particularly well-suited for use in network and mobile environments, where bandwidth and processing power are limited.
The JPEG 2000 standard is based on a wavelet transform, which allows for more efficient compression of images compared to the discrete cosine transform (DCT) used in the JPEG standard. The wavelet transform is applied to the image data, and the resulting coefficients are quantized and entropy coded. This process allows for the creation of a bit stream that can be decoded to reconstruct the original image. The standard also supports region-of-interest (ROI) coding, which allows for the encoding of certain parts of an image at a higher quality than the rest of the image. This feature is particularly useful in applications where certain parts of the image are more important than others.
The JPEG 2000 standard also supports scalability, which allows for the creation of multiple layers of an image, each with different qualities and resolutions. This feature is particularly useful in applications where different levels of image quality are required, such as in medical imaging or remote sensing. The standard also supports error resilience, which allows for the recovery of images even if some parts of the bit stream are corrupted.
The JPEG 2000 standard is designed to be compatible with a wide range of hardware and software systems, and it is supported by a number of international standards organizations. The standard is also designed to be royalty-free, which makes it more accessible to a wider range of users and applications. Overall, the JPEG 2000 standard represents a significant advancement in image compression technology, offering improved performance, scalability, and interoperability compared to the older JPEG standard.