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Perceptual quantitative quality assessment of JPEG2000 compressed ct images with various slice thicknesses

Pambrun, Jean-François et Noumeir, Rita. 2011. « Perceptual quantitative quality assessment of JPEG2000 compressed ct images with various slice thicknesses ». In 12th IEEE International Conference on Multimedia and Expo (ICME) (Barcelona, Spain, July 11-15, 2011) Piscataway, NJ, USA : Institute of Electrical and Electronics Engineers.

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Modern medical equipments produce huge amounts of data that need to be archived for long periods and efficiently transferred over networks. Data compression plays an essential role in reducing the amount of medical imaging data. Medical images can usually be compressed by a factor of three before any degradation appears. Higher compression levels are desirable but can only be achieved with lossy compression, thus scarifying image quality. The diagnosis value of compressed medical images has been studied and recommendations about maximum acceptable compression ratios have been provided based on qualitative visual analysis. It has been suggested, without further investigation, that CT images, with thicknesses below five mm, cannot undergo lossy compression if diagnostic value needed to be preserved. In this pa per, we present an objective quantitative quality assessment of compressed CT images using Visual Signal to Noise Ratio. Our results show that visual fidelity can be significantly affected by two factors, slice thickness and exposure time, for images compressed using the same compression ratio.

Type de document: Compte rendu de conférence
Noumeir, Rita
Affiliation: Génie électrique
Date de dépôt: 18 avr. 2013 19:02
Dernière modification: 15 avr. 2016 15:52

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