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Related Experiment Video

Updated: Jul 4, 2026

Automated Compression Testing of the Ocular Lens

Automated Compression Testing of the Ocular Lens

Published on: April 5, 2024

Definition of compression ratio: difference between two commercial JPEG2000 program libraries.

Kil Joong Kim¹, Bohyoung Kim, Seung Wook Choi

¹Department of Radiation Applied Life Science, Seoul National University College of Medicine, Seoul, Korea.

Telemedicine Journal and E-Health : the Official Journal of the American Telemedicine Association

|June 24, 2008

Summary

Commercial JPEG 2000 libraries define compression ratio differently, impacting medical imaging. Standardization is crucial for consistent data compression and communication in radiology.

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Area of Science:

Medical Imaging
Data Compression
Radiology

Background:

JPEG 2000 is a widely used image compression standard in medical imaging.
Variations in compression ratio definitions can lead to inconsistencies in data handling.

Purpose of the Study:

To compare the definition of compression ratio between two commercial JPEG 2000 libraries.
To assess the impact of different libraries and bit depths on achieved compression ratios.

Main Methods:

Two JPEG 2000 libraries (A and B) were used to compress computed tomography (CT) images.
Images from two scanners with different bit depths (12-bit and 16-bit) were compressed at nominal ratios of 10:1, 15:1, and 20:1.
Achieved compression ratios were compared to nominal ratios using one-sample t-tests.

Main Results:

Library A with 12-bit images from scanner 1 achieved compression ratios approximately 1.33-fold higher than nominal (p < 0.0001).
Other scanner-library combinations showed achieved ratios similar to nominal (p > 0.22).

Conclusions:

Commercial JPEG 2000 libraries utilize different definitions for compression ratio.
Standardization of compression ratio definitions is necessary for consistent adoption and communication in medical imaging.