24 research outputs found
ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11 - JCT3V-C0032: A human visual system based 3D video quality metric
This contribution proposes a full-reference Human-Visual-System based 3D
video quality metric. In this report, the presented metric is used to evaluate
the quality of compressed stereo pair formed from a decoded view and a
synthesized view. The performance of the proposed metric is verified through a
series of subjective tests and compared with that of PSNR, SSIM, MS-SSIM, VIFp,
and VQM metrics. The experimental results show that HV3D has the highest
correlation with Mean Opinion Scores (MOS) compared to other tested metrics.Comment: arXiv admin note: substantial text overlap with arXiv:1803.04624,
arXiv:1803.0462
3D Video Quality Metric for 3D Video Compression
As the evolution of multiview display technology is bringing glasses-free
3DTV closer to reality, MPEG and VCEG are preparing an extension to HEVC to
encode multiview video content. View synthesis in the current version of the 3D
video codec is performed using PSNR as a quality metric measure. In this paper,
we propose a full- reference Human-Visual-System based 3D video quality metric
to be used in multiview encoding as an alternative to PSNR. Performance of our
metric is tested in a 2-view case scenario. The quality of the compressed
stereo pair, formed from a decoded view and a synthesized view, is evaluated at
the encoder side. The performance is verified through a series of subjective
tests and compared with that of PSNR, SSIM, MS-SSIM, VIFp, and VQM metrics.
Experimental results showed that our 3D quality metric has the highest
correlation with Mean Opinion Scores (MOS) compared to the other tested
metrics
Effect of High Frame Rates on 3D Video Quality of Experience
In this paper, we study the effect of 3D videos with increased frame rates on
the viewers quality of experience. We performed a series of subjective tests to
seek the subjects preferences among videos of the same scene at four different
frame rates: 24, 30, 48, and 60 frames per second (fps). Results revealed that
subjects clearly prefer higher frame rates. In particular, Mean Opinion Score
(MOS) values associated with the 60 fps 3D videos were 55% greater than MOS
values of the 24 fps 3D videos
An Efficient Human Visual System Based Quality Metric for 3D Video
Stereoscopic video technologies have been introduced to the consumer market
in the past few years. A key factor in designing a 3D system is to understand
how different visual cues and distortions affect the perceptual quality of
stereoscopic video. The ultimate way to assess 3D video quality is through
subjective tests. However, subjective evaluation is time consuming, expensive,
and in some cases not possible. The other solution is developing objective
quality metrics, which attempt to model the Human Visual System (HVS) in order
to assess perceptual quality. Although several 2D quality metrics have been
proposed for still images and videos, in the case of 3D efforts are only at the
initial stages. In this paper, we propose a new full-reference quality metric
for 3D content. Our method mimics HVS by fusing information of both the left
and right views to construct the cyclopean view, as well as taking to account
the sensitivity of HVS to contrast and the disparity of the views. In addition,
a temporal pooling strategy is utilized to address the effect of temporal
variations of the quality in the video. Performance evaluations showed that our
3D quality metric quantifies quality degradation caused by several
representative types of distortions very accurately, with Pearson correlation
coefficient of 90.8 %, a competitive performance compared to the
state-of-the-art 3D quality metrics
3D Video Quality Metric for Mobile Applications
In this paper, we propose a new full-reference quality metric for mobile 3D
content. Our method is modeled around the Human Visual System, fusing the
information of both left and right channels, considering color components, the
cyclopean views of the two videos and disparity. Our method is assessing the
quality of 3D videos displayed on a mobile 3DTV, taking into account the effect
of resolution, distance from the viewers eyes, and dimensions of the mobile
display. Performance evaluations showed that our mobile 3D quality metric
monitors the degradation of quality caused by several representative types of
distortion with 82 percent correlation with results of subjective tests, an
accuracy much better than that of the state of the art mobile 3D quality
metric.Comment: arXiv admin note: substantial text overlap with arXiv:1803.04624;
text overlap with arXiv:1803.04832 and arXiv:1803.0483
Benchmark 3D eye-tracking dataset for visual saliency prediction on stereoscopic 3D video
Visual Attention Models (VAMs) predict the location of an image or video
regions that are most likely to attract human attention. Although saliency
detection is well explored for 2D image and video content, there are only few
attempts made to design 3D saliency prediction models. Newly proposed 3D visual
attention models have to be validated over large-scale video saliency
prediction datasets, which also contain results of eye-tracking information.
There are several publicly available eye-tracking datasets for 2D image and
video content. In the case of 3D, however, there is still a need for
large-scale video saliency datasets for the research community for validating
different 3D-VAMs. In this paper, we introduce a large-scale dataset containing
eye-tracking data collected from 61 stereoscopic 3D videos (and also 2D
versions of those) and 24 subjects participated in a free-viewing test. We
evaluate the performance of the existing saliency detection methods over the
proposed dataset. In addition, we created an online benchmark for validating
the performance of the existing 2D and 3D visual attention models and
facilitate addition of new VAMs to the benchmark. Our benchmark currently
contains 50 different VAMs
A Learning-Based Visual Saliency Fusion Model for High Dynamic Range Video (LBVS-HDR)
Saliency prediction for Standard Dynamic Range (SDR) videos has been well
explored in the last decade. However, limited studies are available on High
Dynamic Range (HDR) Visual Attention Models (VAMs). Considering that the
characteristic of HDR content in terms of dynamic range and color gamut is
quite different than those of SDR content, it is essential to identify the
importance of different saliency attributes of HDR videos for designing a VAM
and understand how to combine these features. To this end we propose a
learning-based visual saliency fusion method for HDR content (LVBS-HDR) to
combine various visual saliency features. In our approach various conspicuity
maps are extracted from HDR data, and then for fusing conspicuity maps, a
Random Forests algorithm is used to train a model based on the collected data
from an eye-tracking experiment. Performance evaluations demonstrate the
superiority of the proposed fusion method against other existing fusion
methods
Compression of High Dynamic Range Video Using the HEVC and H.264/AVC Standards
The existing video coding standards such as H.264/AVC and High Efficiency
Video Coding (HEVC) have been designed based on the statistical properties of
Low Dynamic Range (LDR) videos and are not accustomed to the characteristics of
High Dynamic Range (HDR) content. In this study, we investigate the performance
of the latest LDR video compression standard, HEVC, as well as the recent
widely commercially used video compression standard, H.264/AVC, on HDR content.
Subjective evaluations of results on an HDR display show that viewers clearly
prefer the videos coded via an HEVC-based encoder to the ones encoded using an
H.264/AVC encoder. In particular, HEVC outperforms H.264/AVC by an average of
10.18% in terms of mean opinion score and 25.08% in terms of bit rate savings
Evaluating the Performance of Existing Full-Reference Quality Metrics on High Dynamic Range (HDR) Video Content
While there exists a wide variety of Low Dynamic Range (LDR) quality metrics,
only a limited number of metrics are designed specifically for the High Dynamic
Range (HDR) content. With the introduction of HDR video compression
standardization effort by international standardization bodies, the need for an
efficient video quality metric for HDR applications has become more pronounced.
The objective of this study is to compare the performance of the existing
full-reference LDR and HDR video quality metrics on HDR content and identify
the most effective one for HDR applications. To this end, a new HDR video
dataset is created, which consists of representative indoor and outdoor video
sequences with different brightness, motion levels and different representing
types of distortions. The quality of each distorted video in this dataset is
evaluated both subjectively and objectively. The correlation between the
subjective and objective results confirm that VIF quality metric outperforms
all to ther tested metrics in the presence of the tested types of distortions
ISO/IEC JTC1/SC29/WG11 MPEG2014/ m34661: Quality Assessment of High Dynamic Range (HDR) Video Content Using Existing Full-Reference Metrics
The main focus of this document is to evaluate the performance of the
existing LDR and HDR metrics on HDR video content which in turn will allow for
a better understanding of how well each of these metrics work and if they can
be applied in capturing, compressing, transmitting process of HDR data. To this
end a series of subjective tests is performed to evaluate the quality of
DML-HDR video database [1], when several different representing types of
artifacts are present using a HDR display. Then, the correlation between the
results from the existing LDR and HDR quality metrics and those from subjective
tests is measured to determine the most effective exiting quality metric for
HDR.Comment: arXiv admin note: substantial text overlap with arXiv:1803.0481