Results 11 to 20 of about 12,095 (255)

JPEG2000 encoding with perceptual distortion control [PDF]

IEEE Transactions on Image Processing, 2004
In this paper, a new encoding approach is proposed to control the JPEG2000 encoding in order to reach a desired perceptual quality. The new method is based on a vision model that incorporates various masking effects of human visual perception and a perceptual distortion metric that takes spatial and spectral summation of individual quantization errors ...
Zhen Liu, Lina J. Karam, Andrew B. Watson   +2 more
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Content-Based Distortion Control Scheme for High-Quality Wireless Multimedia Services

EURASIP Journal on Wireless Communications and Networking, 2008
In recent years, the wireless mobile markets are witnessing an unprecedented growth. High-quality video service will be greatly needed as one of the hottest wireless multimedia services in the future generation wireless networks.
Lee Seung-youn, Kim Young-Sil, Kim Seoksoo, Sun Chang, Wang Hong-Jun, Yu Xin-Bo   +5 more
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Distorted perceptual face maps

Acta Psychologica, 2020
Recent research has shown that proprioception relies on distorted representations of body size and shape. By asking participants to localise multiple landmarks in space, perceptual body maps can be constructed. Such maps of the hand and forearm is highly distorted, with large overestimation of limb width compared to length.
Matthew R, Longo, Marie, Holmes
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On Perception and Consciousness in HPPD: A Systematic Review

Frontiers in Neuroscience, 2021
Hallucinogen-persisting perception disorder (HPPD) features as a diagnostic category in the DSM-5, ICD-11, and other major classifications, but our knowledge of the phenomenology of the perceptual symptoms involved and the changes in consciousness during
Pieter J. Vis, Pieter J. Vis, Pieter J. Vis, Anneke E. Goudriaan, Anneke E. Goudriaan, Bastiaan C. ter Meulen, Jan Dirk Blom, Jan Dirk Blom, Jan Dirk Blom   +8 more
doaj   +1 more source

HEVC perceptual intra-frame rate control inspired by video subjective observation experiment

Tongxin xuebao, 2021
In view of the low perceptual rate-distortion performance of the rate control method used in high efficiency video coding (HEVC), an intra-frame rate control algorithm to effectively improve the perceptual rate-distortion performance of video was ...
Yanchao GONG, Ling WANG, Ying LIU, Kaifang YANG, Qingfan LIN, Fuping WANG   +5 more
doaj   +2 more sources

Evaluation of a Framework for Robust Image Reversible Watermarking

Applied Sciences, 2022
In the literature, robust reversible watermarking schemes (RWSs) allow the extraction of watermarks after the images have suffered attacks; however, the modified images are compromised.
Jose Juan Garcia-Hernandez, Claudia Feregrino-Uribe, Alejandra Menendez-Ortiz, Dan Williams Robledo-Cruz   +3 more
doaj   +1 more source

Correction of geometric perceptual distortions in pictures [PDF]

Proceedings of the 22nd annual conference on Computer graphics and interactive techniques - SIGGRAPH '95, 1995
We suggest an approach for correcting several types of perceived geometric distortions in computer-generated and photographic images. The approach is based on a mathematical formalization of desirable properties of pictures. We provide a review of perception of pictures and identify perceptually important geometric properties of images.
Zorin, Denis, Barr, Alan H.
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Analysis of the Perceptual Quality Performance of Different HEVC Coding Tools

IEEE Access, 2021
Each new video encoding standard includes encoding techniques that aim to improve the performance and quality of the previous standards. During the development of these techniques, PSNR was used as the main distortion metric.
Javier Ruiz Atencia, Otoniel Lopez Granado, Manuel Perez Malumbres, Miguel Onofre Martinez-Rach, Glenn Van Wallendael   +4 more
doaj   +1 more source

Perceptual Distortions of 3-D Finger Size [PDF]

Perception, 2019
Our body is a volumetric, three-dimensional (3-D) object in the world, and we experience it as such. Existing methods for measuring the perceptual body image, however, have been based on judgments of one-dimensional (1-D) length or two-dimensional images.
Ebru Ecem Tavacioglu, Elena Azañón, Matthew R. Longo   +2 more
openaire   +2 more sources

Perception-Based CTU Level Bit Allocation for Intra High Efficiency Video Coding

IEEE Access, 2019
The conventional rate control algorithm does not fully consider the characteristics of the Human Visual System (HVS). To address this problem, in this paper, a perception based Coding Tree Unit (CTU) level bit allocation algorithm for intra High ...
Xiaoyan Liu, Yun Zhang, Linwei Zhu, Huanhua Liu   +3 more
doaj   +1 more source