scholarly journals METAPHASE SPREAD DETECTION AND FOCUS USING CLOSED CIRCUIT TELEVISION

1974 ◽  
Vol 22 (7) ◽  
pp. 536-545 ◽  
Author(s):  
ELBERT T. JOHNSON ◽  
LAWRENCE J. GOFORTH
Keyword(s):  
Metaphase Chromosome ◽  
High Spatial Frequency ◽  
Vertical Motion ◽  
Video Signal ◽  
Closed Circuit ◽  
Closed Circuit Television ◽  
Video Signal Processing ◽  
Television Camera ◽  
And Performance ◽  
Microscope Stage

Automatic focus and detection of metaphase chromosome spreads have been implemented in an automated light microscope system and performance has been evaluated. The video signal from a standard closed circuit television camera is used to generate focus quality and spread presence parameters that are input to a computer. The computer, through its operating software, controls lateral and vertical motion of the microscope stage to search the slide for metaphase chromosome spreads and to focus them. The video signal processing required to generate the parameters, its implementation and the operating software are described. The evaluation of spread detection performance emphasizes the need for well prepared slides with clean backgrounds. The performance of two methods of obtaining a focus parameter is compared. The first method involves measuring the high spatial frequency content of the image; the second method uses the distribution of optical density within the image.

scholarly journals Data Association Methods via Video Signal Processing in Imperfect Tracking Scenarios: A Review and Evaluation

2020 ◽  
Vol 2020 ◽  
pp. 1-26
Author(s):  
Hui Li ◽  
Yapeng Liu ◽  
Wenzhong Lin ◽  
Lingwei Xu ◽  
Junyin Wang
Keyword(s):  
Signal Processing ◽  
Deep Learning ◽  
Data Association ◽  
Evaluation Criteria ◽  
Video Signal ◽  
Video Signal Processing ◽  
Video Signals ◽  
And Performance ◽  
Multiobject Tracking ◽  
Made In

In 5G scenarios, there are a large number of video signals that need to be processed. Multiobject tracking is one of the main directions in video signal processing. Data association is a very important link in tracking algorithms. Complexity and efficiency of association method have a direct impact on the performance of multiobject tracking. Breakthroughs have been made in data association methods based on deep learning, and the performance has been greatly improved compared with traditional methods. However, there is a lack of overviews about data association methods. Therefore, this article first analyzes characteristics and performance of three traditional data association methods and then focuses on data association methods based on deep learning, which is divided into different deep network structures: SOT methods, end-to-end methods, and Wasserstein metric methods. The performance of each tracking method is compared and analyzed. Finally, it summarizes the current common datasets and evaluation criteria for multiobject tracking and discusses challenges and development trends of data association technology and data association methods which ensure robust and real time need to be continuously improved.

Circuit for studying the spatial profile of a laser beam using a closed‐circuit television camera

1988 ◽  
Vol 59 (11) ◽  
pp. 2494-2496 ◽  
Author(s):  
C. P. Navathe ◽  
B. S. Narayan ◽  
S. M. Oak ◽  
B. L. Gupta
Keyword(s):  
Laser Beam ◽  
Closed Circuit ◽  
Spatial Profile ◽  
Closed Circuit Television ◽  
Television Camera

scholarly journals Private Security and Closed-Circuit Television (CCTV) Surveillance: A Systematic Review of Function and Performance

2019 ◽  
Vol 36 (1) ◽  
pp. 56-69
Author(s):  
Brandon C. Welsh ◽  
Eric L. Piza ◽  
Amanda L. Thomas ◽  
David P. Farrington
Keyword(s):  
Systematic Review ◽  
Private Security ◽  
Closed Circuit ◽  
Active Monitoring ◽  
Public And Private ◽  
Closed Circuit Television ◽  
Global Database ◽  
Security Personnel ◽  
Cctv Surveillance ◽  
And Performance

Private security personnel play an important but largely overlooked role in the operation of closed-circuit television (CCTV) surveillance to prevent crime in public and private areas. This role can take a number of forms, including active monitoring of cameras. Drawing upon a global database of CCTV evaluations ( N = 165), this article examines the function and performance of private security personnel as related to the effectiveness of CCTV. Findings indicate that CCTV schemes operated by private security personnel generated larger crime prevention effects than those operated by police or those using a mix of police and security personnel. Policy and research implications are discussed.

scholarly journals From Closed-Circuit Television to the Open Network of Live Cinema

2009 ◽  
Vol 7 (2) ◽  
pp. 102-114 ◽  
Author(s):  
Paola Barreto Leblanc
Keyword(s):  
Closed Circuit ◽  
Closed Circuit Television ◽  
Open Network ◽  
And Performance ◽  
Film Making ◽  
Narrative Conventions

This paper accompanies four films which use CCTV to create Live Cinema performances which challenge both the narrative conventions of cinema and the expectations that we have of CCTV images. The paper details the ways in which this occurs and concludes with some lessons for future CCTV film-making and performance. The films can be viewed at: http://paoleb-ccvv.blogspot.com/

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