Fahmi Kammoun and Mohamed Salim Bouhlel
A Perceptual Image Coding method of High Compression Rate
2904 - 2908
2007
1
9
International Journal of Computer and Information Engineering
https://publications.waset.org/pdf/14648
https://publications.waset.org/vol/9
World Academy of Science, Engineering and Technology
In the framework of the image compression by
Wavelet Transforms, we propose a perceptual method by
incorporating Human Visual System (HVS) characteristics in the
quantization stage. Indeed, human eyes havent an equal sensitivity
across the frequency bandwidth. Therefore, the clarity of the
reconstructed images can be improved by weighting the quantization
according to the Contrast Sensitivity Function (CSF). The visual
artifact at low bit rate is minimized. To evaluate our method, we use
the Peak Signal to Noise Ratio (PSNR) and a new evaluating criteria
witch takes into account visual criteria. The experimental results
illustrate that our technique shows improvement on image quality at
the same compression ratio.
Open Science Index 9, 2007