Comparison of perceptually uniform
quantization with average error minimization in image transform coding
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J.Malo, F.Ferri, J.Albert, J.Soret
Electronics Letters, Vol. 35, 13,
pp. 1067-1068 (1999) |
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| Abstract
An alternative transform coder design criterion
based on restricting the maximum perceptual error of each coefficient
is proposed. This perceptually uniform quantization of the transform domain
ensures that the perceptual error will be below a certain limit regardless
of the particular input image. The results show that the proposed criterion
improves the subjective quality of the conventional
average error
criterion even if it is weighted with the same perceptual metric.
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| Keywords: Image coding. Perceptual
transform quantization. Non-linear perceptual metric.
References: 7 |
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