Blockiness in JPEG-coded images

@inproceedings{Meesters1999BlockinessIJ,
  title={Blockiness in JPEG-coded images},
  author={Lydia M. J. Meesters and J. Martens},
  booktitle={Electronic Imaging},
  year={1999}
}
In two experiments, dissimilarity data and numerical scaling data were obtained to determine the underlying attributes of image quality in baseline sequential JPEG coded imags. Although several distortions were perceived, i.e., blockiness, ringing and blur, the subjective data for all attributes where highly correlated, so that image quality could approximately be described by one independent attribute. We therefore proceeded by developing an instrumental measure for one of these distortions, i… Expand
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References

SHOWING 1-4 OF 4 REFERENCES
Perceptual characterization of images degraded by blur and noise: model.
TLDR
A psychometric space in which the positions of the images are determined by objective measures on the images, and it is shown that the attributes and the quality thus estimated correlate well with the perceived attributes and quality. Expand
Image quality measures and their performance
TLDR
Although some numerical measures correlate well with the observers' response for a given compression technique, they are not reliable for an evaluation across different techniques, and a graphical measure called Hosaka plots can be used to appropriately specify not only the amount, but also the type of degradation in reconstructed images. Expand
JPEG still image compression
  • standard, van Nostrand Reinhold,
  • 1993
Image quality: a multidimensional problem