Assuring Quality Bounds for Distance Measurements on JPEG 2000 Compressed CT Scans

Authors:
Juan Paz;Iroel Miranda
Affiliations:
Centro de Estudios de Electrónica y Tecnologías de la Información (CEETI), Universidad Central "Marta Abreu" de las Villas, Villa Clara, Cuba C. P.: 54830;Centro de Estudios de Electrónica y Tecnologías de la Información (CEETI), Universidad Central "Marta Abreu" de las Villas, Villa Clara, Cuba C. P.: 54830
Venue:
ICIAR '09 Proceedings of the 6th International Conference on Image Analysis and Recognition
Year:
2009

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Abstract

The effect of JPEG 2000 compression on distance measurements in high resolution computer tomography (CT) images is investigated. The behavior of objective quality criteria are used to develop experiments employing human observers in order to estimate the maximum achievable compression rate (CR) that does not affect distance measurements on this type of images. The graphical behavior of objective metrics is presented. Around CR = 80:1, a maximum permissible error of 1.5 mm in distance measurements is obtained. The confidence in distance measurements would be reduced for images compressed at higher CR values than this. This result facilitates a safer use of JPEG 2000 codec when compressing high resolution images like the images tested, and assures a safer diagnosis task when dealing with distance measurements.