COMP-BIT-LIST SIZE IMPROVEMENT IN MESPOTINE RLE AND ITS APPLICATIONS

Authors : Shiva PUTRA, Hs SHESHADRİ, V LOKESHA

Pages : 971-980

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Publication Date : 2016-12-20

Article Type : Other Papers

Abstract :Run Length Encoding insert ignore into journalissuearticles values(RLE); is one of the simplest and primitive lossless data compression technique. RLE sometimes doubles the size of compressed data stream. To overcome this disadvantage, several algorithms have been introduced, one of which being Mespotine RLE insert ignore into journalissuearticles values(MRLE);. This paper introduces modification to MRLE technique in which the constant size ‘Comp-Bit List’ have been replaced by ‘Variable Size Comp-Bit List’ and refers to the new technique as improved – MRLE insert ignore into journalissuearticles values(iMRLE); technique. This paper discusses the details of ‘Variable Size Comp-Bit List’ and utilizes this concept for lossless compression and decompression of 8-bit grayscale medical images and extends the concept to 16-bit grayscale medical images. Image quality metrics such as Compression Ratio insert ignore into journalissuearticles values(CR);, Root Mean Square Error insert ignore into journalissuearticles values(RMSE);, Peak Signal-to-Noise Ratio insert ignore into journalissuearticles values(PSNR); and Entropy are used to check the quality of decompressed image obtained using iMRLE technique. Finally, the compression ratio achieved for existing MRLE and iMRLE techniques for 8-bit and 16-bit grayscale images have been assessed and iMRLE is found to produce best results for lossless compression and decompression of medical images
Keywords : Mespotine RLE, iMRLE, variable size comp bits, medical image, lossless compression