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Gratings That Induce Perceptual Distortions Mask Superimposed Targets
Perception, 1996Masking is known to depend upon the relationship between the spatial-frequency content of target and mask. This relationship has been held constant in three experiments in order to investigate the separate contribution of the spatial parameters of the mask, in this case a grating with square-wave luminance profile.
Chronicle, E. P., Wilkins, A. J.
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Mask building for perceptually hiding frequency embedded watermarks
Proceedings 1998 International Conference on Image Processing. ICIP98 (Cat. No.98CB36269), 2002The interest in image watermarking techniques has rapidly grown during the years. Two requirements needed to be satisfied to use watermarking techniques for copyright protection are: unperceivability and robustness against image processing algorithms and forgery attacks.
F. Bartolini +3 more
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Improving the perceptual quality of ideal binary masked speech
2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2017It is known that applying a time-frequency binary mask to very noisy speech can improve its intelligibility but results in poor perceptual quality. In this paper we propose a new approach to applying a binary mask that combines the intelligibility gains of conventional binary masking with the perceptual quality gains of a classical speech enhancer. The
Leo Lightburn +4 more
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Bag Valve Mask Ventilation as a Perceptual-Cognitive Skill
Human Factors: The Journal of the Human Factors and Ergonomics Society, 2017Objective This study used a high-fidelity infant mannequin to examine the relationship between the quality of bag valve mask ventilation (BVMV) and how providers of varying levels of experience use visual feedback (e.g., electronic vital signs) to guide their performance.
Joel M. Mumma +5 more
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Perceptual masking of boar taint in Swedish fermented sausages
Meat Science, 2009Surgical castration of male piglets has traditionally been practiced to avoid development of boar taint in pork meat which can occur if entire male pigs are raised. Boar taint is commonly characterised as exhibiting the odour and flavour of urine and manure.
Nielsen, Sandra Stolzenbach +4 more
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Video watermarking in the 3D-DWT domain using perceptual masking
IEEE International Conference on Image Processing 2005, 2005A novel video watermarking system operating in the three-dimensional discrete wavelet transform (3D DWT) is here presented. Specifically the video sequence is partitioned into spatio-temporal units and the single shots are projected onto the 3D DWT domain.
Patrizio Campisi, Alessandro Neri 0001
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Proceedings 1998 International Conference on Image Processing. ICIP98 (Cat. No.98CB36269), 2002
A perceptual model based on the texture masking and luminance masking properties of the human visual system is presented in this paper. The model computes a local multiplier map for scaling of the JPEG quantization matrix. The result is that fewer bits are used to represent the perceptually less important areas of the image.
Henry H. Y. Tong +1 more
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A perceptual model based on the texture masking and luminance masking properties of the human visual system is presented in this paper. The model computes a local multiplier map for scaling of the JPEG quantization matrix. The result is that fewer bits are used to represent the perceptually less important areas of the image.
Henry H. Y. Tong +1 more
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The effect of integration masking on visual processing in perceptual categorization
Brain and Cognition, 2017Learning to recognize and categorize objects is an essential cognitive skill allowing animals to function in the world. However, animals rarely have access to a canonical view of an object in an uncluttered environment. Hence, it is essential to study categorization under noisy, degraded conditions.
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Estimation of perceptual entropy using noise masking criteria
ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003The perceptual entropy of each short-term section of the audio stimuli is estimated as the number of bits required to encode the short-term spectrum of the signal to the resolution measured by this process provide an entropy estimate, for transparent coding, of 1.4 (mean) or 2.1 (peak) bits/sample for telephone speech (200-3200-Hz bandwidth sampled at ...
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Spectral Envelope and Perceptual Masking Models
2017Envelope models describe the gross shape of a signal, such as the magnitude spectrum of a speech signal. An envelope model of the spectrum is thus a source model of the speech signal. Perceptual (frequency) masking models are evaluation models, which describe the magnitude of the perceptually detrimental effect of errors in different parts of the ...
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