نتایج جستجو برای: video quality assessments

تعداد نتایج: 960720  

Transmission of compressed video over error prone channels may result in packet losses, which can degrade the image quality. Error concealment (EC) is an effective approach to reduce the degradation caused by the missed information. The conventional temporal EC techniques are always inefficient when the motions of the video object are irregular. In this paper, in order to overcome this problem,...

2015
Marjolaine Baude Emilie Hutin Jean-Michel Gracies

OBJECTIVE To design a bidimensional facial movement measuring tool and study its reliability. METHODS We utilized the free video-analysis software Kinovea that can track preselected points during movements and measure two-point distances off-line. Three raters positioned facial markers on 10 healthy individuals and video-taped them during maximal bilateral contractions of frontalis, corrugato...

Journal: :Int. J. Semantic Computing 2009
Mohammad Soleymani Guillaume Chanel Joep J. M. Kierkels Thierry Pun

In this paper, we propose an approach for affective characterization of movie scenes based on the emotions that are actually felt by spectators. Such a representation can be used to characterize the emotional content of video clips in application areas such as affective video indexing and retrieval, and neuromarketing studies. A dataset of 64 different scenes from eight movies was shown to eigh...

2016
Dietmar Saupe Franz Hahn Vlad Hosu Igor Zingman Masud Rana Shujun Li

We carried out crowdsourced video quality assessments using paired comparisons and converting the results to differential mean opinion scores (DMOS). A previous labbased study had provided corresponding MOS-values for absolute category ratings. Using a simple linear transformation to fit the crowdsourcing-based DMOS values to the lab-based MOS values, we compared the results in terms of correla...

بهلگردی, مجید, حسین پور, حمید, سیم فروش, ناصر, قاضی زاده, مهدی, نجفی سمنانی, محمد,

Background and Aim: To determine whether an inexpensive set up of point to point wireless intranet connection can provide adequate video and audio teleconferencing and image quality to support remote real-time surgical demonstration and telementoring. To our knowledge, there is no similar report from Iran. Materials and Methods: Surgeon performing a novel laparoscopic extraperitoneal trigonopl...

Journal: :Jurnal Penelitian Pendidikan IPA (JPPIPA) 2022

This research aimed to develop an audiovisual-based PowToon animation video on the subject matter of chemical bonds and analyze quality animated as learning media study based assessment material experts, chemistry teachers, students’ responses. used development methods (R&D) with a 4D model (Define, Design, Development, Dissemination). However, was limited dissemination stage in this resear...

H. Ghanei Yakhdan, J. Chitizadeh, M. Khademi,

The performance of video transmission over wireless channels is limited by the channel noise. Thus many error resilience tools have been incorporated into the MPEG-4 video compression method. In addition to these tools, the unequal error protection (UEP) technique has been proposed to protect the different parts in an MPEG-4 video packet with different channel coding rates based on the rate...

2018
Jenni Burt Gary Abel Natasha Elmore Jenny Newbould Antoinette Davey Nadia Llanwarne Inocencio Maramba Charlotte Paddison John Benson Jonathan Silverman Marc N. Elliott John Campbell Martin Roland

Patient evaluations of physician communication are widely used, but we know little about how these relate to professionally agreed norms of communication quality. We report an investigation into the association between patient assessments of communication quality and an observer-rated measure of communication competence. Consent was obtained to video record consultations with Family Practitione...

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