Mario Mastriani and Juliana Gambini
Fast Cosine Transform to Increase Speedup and Efficiency of KarhunenLoève Transform for Lossy Image Compression
199 - 209
2010
4
1
International Journal of Electrical and Computer Engineering
https://publications.waset.org/pdf/2982
https://publications.waset.org/vol/37
World Academy of Science, Engineering and Technology
In this work, we present a comparison between two
techniques of image compression. In the first case, the image is
divided in blocks which are collected according to zigzag scan. In
the second one, we apply the Fast Cosine Transform to the image,
and then the transformed image is divided in blocks which are
collected according to zigzag scan too. Later, in both cases, the
KarhunenLoève transform is applied to mentioned blocks. On the
other hand, we present three new metrics based on eigenvalues for a
better comparative evaluation of the techniques. Simulations show
that the combined version is the best, with minor Mean Absolute
Error (MAE) and Mean Squared Error (MSE), higher Peak Signal to
Noise Ratio (PSNR) and better image quality. Finally, new technique
was far superior to JPEG and JPEG2000.
Open Science Index 37, 2010