Irreversible Compression of Medical Images

Abstract

The volume of data from medical imaging is growing at exponential rates, matching or exceeding the decline in the costs of digital data storage. While methods to reversibly compress image data do exist, current methods only achieve modest reductions in storage requirements. Irreversible compression can achieve substantially higher compression ratios without perceptible image degradation. These techniques are routinely applied in teleradiology, and often in Picture Archiving and Communications Systems. The practicing radiologist needs to understand how these compression techniques work and the nature of the degradation that occurs in order to optimize their medical practice. This paper describes the technology and artifacts commonly used in irreversible compression of medical images.

Effective compression of hyperspectral imagery using an improved 3D DCT approach for land-cover analysis in remote-sensing applications

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Combining Jpeg Steganography and Substitution Encryption for Secure Data Communication

“…To compress an image into JPEG format, the RGB colour representation is first converted to a YUV representation space and break up each colour plane into 8 x 8 blocks of pixels [18,21]. In this representation the Y component corresponds to the luminance (or brightness) and the U and V components stand for chrominance (or colour) [23].…”

The Current Role of Image Compression Standards in Medical Imaging

“…However, in this paper, we limit our discussion to medical images). It is important to note that there have been earlier reviews of medical image compression techniques [5][6][7][8][9][10][11][12][13][14]. In this paper, we focus on the image compression standards including the more recent standards that have not been considered in these earlier reviews.…”