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7 May 1997 DCTune perceptual optimization of compressed dental x-rays
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This is a brief report on research on the subject of DCTune optimization of JPEG compression of dental x-rays. DCTune is a technology for optimizing DCT quantization matrices to yield maximum perceptual quality for a given bit-rate, or minimum bit-rate for a given perceptual quality. In addition, the technology provides a means of setting the perceptual quality of compressed imagery in a systematic way. We optimized matrices for a total of 20 images at two resolutions (150 and 300 dpi) and four bit-rates (0.25, 0.5, 0.75, 1.0 bits/pixel), and examined structural regularities in the resulting matrices. We also conducted some brief psychophysical studies to validate the DCTune quality metric and to demonstrate the visual advantage of DCTune compression over standard JPEG. Keywords: jpeg, compression, quantization, adaptive, image quality
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andrew B. Watson, Mathias Taylor, and Robert Borthwick "DCTune perceptual optimization of compressed dental x-rays", Proc. SPIE 3031, Medical Imaging 1997: Image Display, (7 May 1997);

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