Raghad Z. Yousif
Abstract
The purpose of this work is to reduce the data volume and to achieve a low bit rate in the digital representation of Low vision medical digital images (X-ray & MRI), without a perceived ...
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The purpose of this work is to reduce the data volume and to achieve a low bit rate in the digital representation of Low vision medical digital images (X-ray & MRI), without a perceived loss of image quality. In JPEG compression, it is passible to control the compression ratio and image quality by controlling quantization table values. Thus an attempt is made to standardize the JPEG quantization table for medical images by statistical methods. The resulted compressed images show low bit rates with approximately little degradation in their visual quality PSNR (Peak Signal to Noise Ratio). Then the resulted quantization table is used as a standard quantization table for enhancement technique in DCT (Discrete Cosine Transform) domain. The level of enhancement is adjusted by a parameter which can be setted to any desired level. The resulted medical images resulted at the output of presented system show high visual quality.
