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Heterogeneous Image Transcoding using Interconversion Matrices |
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PP: 39-46 |
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doi:10.18576/amis/130106
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Author(s) |
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V. Mohan,
P. Shanmugapriya,
Y. Venkataramani,
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Abstract |
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| We propose a new scheme for heterogeneous transcoding of image files from JPEG to JPEG 2000 format with directional
filter analysis and modified SPIHT coding scheme. The optimal parameters QF out(I,D) and Z(I,D) that produce high perceived quality
in terms of SSIM are selected using a prediction algorithm. Furthermore, the heterogeneous image transcoding are performed using
inter-conversion matrices which reduce the computational overheads. The resultant coefficients, using BDCT to DWT, are analyzed
by Directional Filter banks (DFBs). The DWT-DFB coefficients are encoded via progressive SPIHT algorithm to meet the devices
constraints. In the experimental set up, the quality of reconstructed image is measured using PSNR and SSIM. It is shown that there is
an improvement of more than 4 dB in the quality of reconstruction for the same bit rate as that of mere DWT-based SPIHT encoding.
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