A Novel Approach on Discrete Cosion Transform Based Image Compression Technique for Lung Cancer

T. Karthikeyan¹ and C. Thirumoorthi ^2*

¹Department of Computer Science, PSG College of Arts and Science, Coimbatore, India.

²Research Scholar, Bharathiar University, Coimbatore, Department of Computer Science, Hindustan College of Arts and Science, Coimbatore, India.

Corresponding Author E-mail: cthirumoorthymca@gmail.com

DOI : http://dx.doi.org/10.13005/bbra/2317

ABSTRACT: In medical field the volume of medical image data produced every day  is ever growing, particularly in grouping with the improved scanning resolutions and the importance of volumetric medical image data sets. In this work, five image compression methods are simulated. They are Karhunen-Loève Transform (KLT), Walsh-Hadamard Transform (WHT), Fast Fourier Transform (FFT), proposed Sparse Fast Fourier Transform (SFFT) and Discrete Cosine Transform (DCT). The results of simulation are shown and compared different quality parameters of it are by applying on various lung cancer CT Scan medical images. The DCT method algorithm was given better results like Compression Ratio (CR), Structural Content (SC), Mean Square Error (MSE) and Peak Signal to Noise Ratio (PSNR) compare to other Transform methods. The DCT technique given improved result compared with other methods in all evaluation measures.

KEYWORDS: Image compression; KLT; WHT; FFT; SFFT; DCT; lung cancer CT images; CR; SC; MSE; PSNR

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