A Perceptually Optimized Foveation Wavelet Visible Difference Predictor Quality Metric Based on Psychovisual Properties of the Human Visual System (HVS)

2020 ◽  
pp. 268-281
Author(s):  
Abderrahim Bajit
Keyword(s):  
Visual System ◽  
Video Compression ◽  
Image Coding ◽  
Human Visual System ◽  
Quality Measurement ◽  
Region Of Interest ◽  
Visual Quality ◽  
Perceptual Quality ◽  
Foveated Imaging ◽  
Error Perception

Region of interest (ROI) image and video compression techniques have been widely used in visual communication applications in an effort to deliver good quality images and videos at limited bandwidths. Foveated imaging exploits the fact that the spatial resolution of the human visual system (HVS) is highest around the point of fixation (foveation point) and decreases dramatically with increasing eccentricity. Exploiting this fact, the authors have developed an appropriate metric for the assessment of ROI coded images, adapted to foveation image coding based on psycho-visual quality optimization tools, which objectively enable us to assess the visual quality measurement with respect to the region of interest (ROI) of the human observer. The proposed metric yields a quality factor called foveation probability score (FPS) that correlates well with visual error perception and demonstrating very good perceptual quality evaluation.

scholarly journals Learning to Measure Stereoscopic S3D Image Perceptual Quality on the Basis of Binocular Rivalry Response

2019 ◽  
Vol 9 (18) ◽  
pp. 3906
Author(s):  
Siyuan Huang ◽  
Wujie Zhou
Keyword(s):  
Image Quality ◽  
Binocular Rivalry ◽  
Quality Measurement ◽  
Research Field ◽  
Perceptual Quality ◽  
Evaluation Performance ◽  
Stereoscopic 3D ◽  
Performance Loss ◽  
Challenging Issue ◽  
Évaluation Performance

Blind perceptual quality measurement of stereoscopic 3D (S3D) images has become an important and challenging issue in the research field of S3D imaging. In this paper, a blind S3D image quality measurement (IQM) method that does not depend on examples of distorted S3D images and corresponding subjective scores is proposed. As the main contribution of this work, we replace human subjective scores with a quality codebook of binocular rivalry responses (BRRs); this allows blind S3D-IQM methods to be learned without evaluation performance loss. Our results, using the publicly accessible LIVE S3D dataset, confirm that our method is highly robust and efficient.

Perceptual quality measurement for scalable video at low spatial resolution in mobile environments

2009 ◽  
Author(s):  
Hosik Sohn ◽  
Hana Yoo ◽  
Cheon Seog Kim ◽  
Wesley De Neve ◽  
Yong Man Ro
Keyword(s):  
Spatial Resolution ◽  
Quality Measurement ◽  
Perceptual Quality ◽  
Scalable Video ◽  
Mobile Environments

LOSSILY COMPRESSED MEDICAL MODALITIES: OBJECTIVE AND SUBJECTIVE QUALITY MEASURES IN RELEVANT TO THE STATISTICAL AND FREQUENCY EVALUATIONS

2004 ◽  
Vol 04 (04) ◽  
pp. 511-533
Author(s):  
OH TICK HUI
Keyword(s):  
Signal To Noise Ratio ◽  
Quality Measurement ◽  
Objective Measure ◽  
Perceptual Quality ◽  
Compression Performance ◽  
General Acceptance ◽  
Image Characteristics ◽  
Opinion Score ◽  
Quality Scale ◽  
Magnetic Resonance Imaging Mri

Compressed image will always reduce the image fidelity. This is especially so if the image is compressed at lower bit rates, which most of the time cannot be tolerated. In medical field, this is even more significant. But compression is necessary due to the limited transmission bandwidth and storage capacity. In this paper, the lossy compression performance of the new JPEG2000 and the more conventional JPEG is being studied. The common objective measure, peak signal-to-noise ratio (PSNR) is definitely not adequate as a perceptual quality measurement. Therefore, subjective measures such as picture quality scale (PQS) and mean opinion score (MOS) are included, plus the statistical and frequency measures for the image characteristics evaluation. Four types of medical modalities are used — X-Ray, Magnetic Resonance Imaging (MRI), Ultrasound, and Computed Tomography (CT). From these various measurements, the general acceptance compression bit rate for each of the medical modality is determined.

TINGKAT KEPUASAN PESERTA LELANG TERHADAP PELAYANAN TEMPAT PELELANGAN IKAN (TPI) MORODEMAK

2019 ◽  
Vol 13 (2) ◽  
pp. 122-130
Author(s):  
Dian ayunita Nugraheni nurmala Dewi
Keyword(s):  
Performance Analysis ◽  
Service Quality ◽  
Gap Analysis ◽  
Quality Measurement ◽  
Service Satisfaction ◽  
Importance Value ◽  
Auction House ◽  
Participant Satisfaction ◽  
And Performance ◽  
Descriptive Method

Objectives of this study were analyze fish auction participant satisfaction to auction services in TPI Morodemak, analyze attributes effect, services that fit to service quality measurement, and analyzed fish auction participants perception to performance and importance for fish auction house Morodemak services. Used descriptive method and purposive sampling with 49 respondents consists of commercial fishmongers, traditional fishmongers, purse seine owners, and boat lift net owners as fish auction participant. Satisfication measurement used Customer Satisfication Index (CSI), Importance and Performance Analysis (IPA) and gap analysis. Results from this study were value CSI 20% (0.2) indicate the auction participants dissatisfied with the services provided, IPA show there are four attributes should be develop, two elements have not been completed based on measurement requirements of service satisfaction, gap value average -0.05 means the auction participants were not satisfied with the performance of TPI services because the performance value was lower than the importance value.

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