Results 201 to 210 of about 7,229,109 (240)

Perceptual Quality Assessment of Chest Radiograph

2021
The quality of a chest X-ray image or radiograph, which is widely used in clinics, is a very important factor affects doctors’ clinical decision making. Since there is no chest X-ray image quality database so far, we conduct the first study of perceptual quality assessment of chest X-ray images by introducing a Chest X-ray Image Quality Database, which
Mengda Guan, Yuanyuan Lyu, Wanyue Cao, Xingwang Wu, Jingjing Lu, S. Kevin Zhou   +5 more
openaire   +1 more source

Perceptual image quality in digital dermoscopy

Medical Imaging 2020: Image Perception, Observer Performance, and Technology Assessment, 2020
When using a conventional analogue dermatoscope, imperfect focus or other image quality problems are readily detected and corrected by the dermatologist. In digital dermoscopy, however, images may be inspected by the dermatologist well after their acquisition. In such a situation, there is no possibility to remedy image quality deficiencies.
Alireza Nasiri Avanaki, Kathryn S. Espig, Albert Xthona, D. Brooks, J. Young, Tom Kimpe   +5 more
openaire   +1 more source

Colour perceptual video quality metric

IEEE International Conference on Image Processing 2005, 2005
This paper proposed an objective colour perceptual video quality metric to automatically assess the perceived quality of colour digital videos. The rationale in proposing perceptual-based metric is because peak signal-to-noise ratio (PSNR), which has been used traditionally to represent the quality of a compressed video sequence, has been found to ...
Ee Ping Ong, Weisi Lin, Zhongkang Lu, Susu Yao   +3 more
openaire   +2 more sources

Perceptual visual quality metrics: A survey

Journal of Visual Communication and Image Representation, 2011
Visual quality evaluation has numerous uses in practice, and also plays a central role in shaping many visual processing algorithms and systems, as well as their implementation, optimization and testing. In this paper, we give a systematic, comprehensive and up-to-date review of perceptual visual quality metrics (PVQMs) to predict picture quality ...
Weisi Lin, C.-C. Jay Kuo
openaire   +1 more source

Perceptual Quality Metric For Compressed Videos

Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005., 2006
The paper proposes an objective perceptual video quality metric to assess the perceived quality of digital videos automatically. Traditionally, peak signal-to-noise ratio (PSNR) has been used to represent the quality of a compressed video sequence. However, PSNR has been found to correlate poorly with subjective quality ratings, particularly at much ...
Ee Ping Ong, Xiaokang Yang 0001, Weisi Lin, Zhongkang Lu, Susu Yao   +4 more
openaire   +1 more source

A measure for perceptual image quality assessment

Proceedings 2003 International Conference on Image Processing (Cat. No.03CH37429), 2004
This paper addresses the issue of perceptual image quality assessment in image restoration systems. Firstly, experiments are conducted to evaluate perceived quality in images degraded only by frequency distortion. Based on the resulting experimental data, a distortion quality measure (DQM) is proposed. Then another experiment, whose test images present
Ronaldo de Freitas Zampolo, Rui Seara
openaire   +2 more sources

Perceptual Quality Assessment of Smartphone Photography

2020 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2020
As smartphones become people’s primary cameras to take photos, the quality of their cameras and the associated computational photography modules has become a de facto standard in evaluating and ranking smartphones in the consumer market. We conduct so far the most comprehensive study of perceptual quality assessment of smartphone photography.
Yuming Fang 0001, Hanwei Zhu, Yan Zeng 0001, Kede Ma, Zhou Wang 0001   +4 more
openaire   +1 more source

Approaching perceptual qualities

2019
Abstract The paper examines the properties of heavy as a perceptual concept, based on evidence from 11 languages. We demonstrate that the semantics of this concept is heterogeneous; lexemes of this field can be used in situations of at least three types: Lifting, Shifting and Weighing.
Daria Ryzhova, Ekaterina Rakhilina, Liliya Kholkina   +2 more
openaire   +1 more source

Reliability in Perceptual Analysis of Voice Quality

Journal of Voice, 2005
This study focuses on speaking voice quality in male teachers (n = 35) and male actors (n = 36), who represent untrained and trained voice users, because we wanted to investigate normal and supranormal voices. In this study, both substantial and methodologic aspects were considered.
openaire   +2 more sources

Continuous assessment of perceptual image quality

Journal of the Optical Society of America A, 1995
The study addresses whether subjects are able to assess the perceived quality of an image sequence continuously. To this end, a new method for assessing time-varying perceptual image quality is presented by which subjects continuously indicate the perceived strength of image quality by moving a slider along a graphical scale.
Hamberg, R., Ridder, de, H.
openaire   +4 more sources