تحقيق جودة الصورة التليفزيونية الرقمية المتحركة من خلال التصحيح اللوني = Realizing Digital Television Image Quality through Color Correction

2017 ◽  
Vol 7 (4) ◽  
pp. 177-192
Author(s):  
محمد علي عبد الكريم ◽  
وائل محمد عناني ◽  
محمد حسين أحمد عمار
Keyword(s):  
Image Quality ◽  
Color Correction ◽  
Digital Television ◽  
Television Image

Image Quality Assessment for Color Correction Based on Color Contrast Similarity and Color Value Difference

2018 ◽  
Vol 28 (4) ◽  
pp. 849-862 ◽  
Author(s):  
Yuzhen Niu ◽  
Haifeng Zhang ◽  
Wenzhong Guo ◽  
Rongrong Ji
Keyword(s):  
Image Quality ◽  
Quality Assessment ◽  
Image Quality Assessment ◽  
Color Correction ◽  
Color Contrast ◽  
Color Value

scholarly journals CHOOSING A COMPRESSION STANDARD FOR TRANSMITTING A TELEVISION IMAGE

2020 ◽  
Vol 5 (333) ◽  
pp. 5-9
Author(s):  
M. Amreev ◽  
◽  
R. Safin ◽  
V. Yakubov ◽  
T. Pavlova ◽  
...  
Keyword(s):  
Visual Perception ◽  
New Technology ◽  
Information Delivery ◽  
Transport Layer ◽  
Digital Television ◽  
Transmission Systems ◽  
Compression Efficiency ◽  
Television Image

With the advent of the MPEG-4 Visual and H.264 compression standards, the role of the MPEG-2 compression standard has not diminished at the present time, since these standards are largely compatible, especially for information highways. Today, in a number of countries, the MPEG-2 compression standard is actually the main one for broadcasting, the functioning of which is based on the operation of DVB-T terrestrial digital television systems. Due to the fact that the majority of the currently used STBs support the MPEG-2 standard, it will remain widespread for at least the next few years. The ITU-T H.264 /MPEG-4 Part 10 AVC standard (abbreviated as H.264/AVC) is a promising new technology for encoding and compressing audiovisual information. The compression efficiency of the H.264/AVC standard is higher than the MPEG-2 standard with equal visual perception. The H.264/AVC standard was developed independent of the transport layer of the transmission systems used. Therefore, information delivery in the H.264/AVC standard can be carried out using any existing transmission and broadcasting systems, including: systems with IP protocols (including streaming delivery), transport streams of broadcasting systems in the MPEG-2 standard, as well as specific formats H.264 / AVC files for storage and processing on servers.

A Stitched Image Quality Assessment Method for Color Correction

2019 ◽  
Vol 56 (3) ◽  
pp. 031102
Author(s):  
齐美玲 Qi Meiling ◽  
邵枫 Shao Feng
Keyword(s):  
Image Quality ◽  
Quality Assessment ◽  
Image Quality Assessment ◽  
Assessment Method ◽  
Color Correction ◽  
Quality Assessment Method

Method for image quality monitoring on digital television networks

1999 ◽  
Author(s):  
Pierre Bretillon ◽  
Jamal Baina ◽  
Michel Jourlin ◽  
Gabriel Goudezeune
Keyword(s):  
Image Quality ◽  
Quality Monitoring ◽  
Digital Television

Digital Television Image Enhancement

1975 ◽  
Vol 84 (7) ◽  
pp. 545-551 ◽  
Author(s):  
John P. Rossi
Keyword(s):  
Image Enhancement ◽  
Digital Television ◽  
Television Image

Image Quality and Face Recognition on a Television Display

1974 ◽  
Vol 16 (3) ◽  
pp. 300-307 ◽  
Author(s):  
Harry L. Snyder
Keyword(s):  
Image Quality ◽  
Systems Design ◽  
Modulation Transfer ◽  
Television System ◽  
Square Wave ◽  
Voltage Ratio ◽  
Single Face ◽  
Time Required ◽  
Television Image

Subjects were asked to match faces presented singly on a television display with one of 35 faces presented on a photographic display. The probability of correct recognition and the time required to recognize the single face were related to the quality of the television image. Image quality was varied by changing the square-wave response of the television system and the video signal-to-noise voltage ratio. A derived unitary metric of image quality, the square-wave modulation transfer function area, MTFASQ, was shown to correlate highly with both measures of observer performance. The utility of this metric for systems design is discussed.

scholarly journals Adaptive power link adaptation on DVB-T system based on picture quality feedback

2019 ◽  
Vol 9 (4) ◽  
pp. 3121
Author(s):  
Tubagus Maulana Kusuma ◽  
Randy Rahmanto ◽  
Emy Haryatmi
Keyword(s):  
Image Quality ◽  
Service Provider ◽  
Link Adaptation ◽  
Reference Image ◽  
Digital Television ◽  
Transmission Power ◽  
Picture Quality ◽  
Quality Metric ◽  
Quality Feedback ◽  
T System

<p>In digital television systems such as DVB-T, service provider has difficulties to observe the quality of picture reception in the viewers’ television. This is due to the unavailability of quality feedback sent from viewers’ devices to the service provider. Therefore, this research proposes link adaptation method in DVB-T system based on image quality measurement at recipient side, so that service provider may adjust the transmission power in real-time to improve the image quality. Quality metric used in this research is human perception- based no-reference image quality metric, which does not need the presence of the reference frame. The quality assessment is focused on the severeness of blocking artifact, which is the dominant artifacts in MPEG video. The numerical results have shown that power adaptation could maintain good picture quality as well as transmission power efficiency at the same time on the digital television transmission system. The proposed scheme is also suitable for other DVB system as well as various digital television system standards.</p>

Psychophysics and the Improvement of Television Image Quality

SMPTE Journal ◽  
1984 ◽  
Vol 93 (8) ◽  
pp. 717-725 ◽  
Author(s):  
William F. Schreiber
Keyword(s):  
Image Quality ◽  
Television Image

Progress In The Practical Application Of Automated Image Analysis To Tem Negatives

1977 ◽  
Vol 35 ◽  
pp. 214-217
Author(s):  
F. A. Heckman ◽  
E. Redman ◽  
J.E. Connolly
Keyword(s):  
Image Analysis ◽  
Image Quality ◽  
Exposure Time ◽  
Image Contrast ◽  
Automated Image Analysis ◽  
Practical Application ◽  
Factors Affecting ◽  
High Image Quality ◽  
Qualitative Evidence ◽  
Comprehensive Study

In our initial publication on this subject1) we reported results demonstrating that contrast is the most important factor in producing the high image quality required for reliable image analysis. We also listed the factors which enhance contrast in order of the experimentally determined magnitude of their effect. The two most powerful factors affecting image contrast attainable with sheet film are beam intensity and KV. At that time we had only qualitative evidence for the ranking of enhancing factors. Later we carried out the densitometric measurements which led to the results outlined below.Meaningful evaluations of the cause-effect relationships among the considerable number of variables in preparing EM negatives depend on doing things in a systematic way, varying only one parameter at a time. Unless otherwise noted, we adhered to the following procedure evolved during our comprehensive study:Philips EM-300; 30μ objective aperature; magnification 7000- 12000X, exposure time 1 second, anti-contamination device operating.

Observability of Very Thick Specimen by Using Transmission Scanning Electron Microscope

1971 ◽  
Vol 29 ◽  
pp. 26-27
Author(s):  
K. Shibatomi ◽  
T. Yamanoto ◽  
H. Koike
Keyword(s):  
Electron Microscope ◽  
Image Quality ◽  
Scanning Electron Microscope ◽  
Chromatic Aberration ◽  
Image Contrast ◽  
Objective Lens ◽  
Thick Specimen ◽  
Transmission Electron ◽  
Scanning Electron

In the observation of a thick specimen by means of a transmission electron microscope, the intensity of electrons passing through the objective lens aperture is greatly reduced. So that the image is almost invisible. In addition to this fact, it have been reported that a chromatic aberration causes the deterioration of the image contrast rather than that of the resolution. The scanning electron microscope is, however, capable of electrically amplifying the signal of the decreasing intensity, and also free from a chromatic aberration so that the deterioration of the image contrast due to the aberration can be prevented. The electrical improvement of the image quality can be carried out by using the fascionating features of the SEM, that is, the amplification of a weak in-put signal forming the image and the descriminating action of the heigh level signal of the background. This paper reports some of the experimental results about the thickness dependence of the observability and quality of the image in the case of the transmission SEM.

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