scholarly journals Shadow Removal in Outdoor Video Sequences by Automatic Thresholding of Division Images

2009 ◽  
pp. 190-198
Author(s):  
Srinivasa Rao Dammavalam ◽  
Claudio Piciarelli ◽  
Christian Micheloni ◽  
Gian Luca Foresti
Keyword(s):  
Video Sequences ◽  
Shadow Removal ◽  
Automatic Thresholding

Shadow Removal for Greyscale Video Sequences

2012 ◽  
Vol 17 (4) ◽  
pp. 117-129
Author(s):  
Tomasz Kryjak
Keyword(s):  
Video Surveillance ◽  
Shadow Detection ◽  
Video Sequences ◽  
Automatic Method ◽  
Shadow Removal ◽  
Rectangular Grid ◽  
Current Frame ◽  
Elimination Algorithm ◽  
Object Edge ◽  
Binarization Threshold

Abstract The paper presents a shadow detection and elimination algorithm designed for greyscale video sequences. The paper proposes: an automatic method for determining the binarization threshold on the basis of the object edge analysis, division of areas identified as potential shadow using a rectangular grid, analyzing the similarities between the current frame and the background model performed in areas and analyzing the potential shadows areas position relative to the position of areas identified as a true object. The algorithm was designed to eliminate shadows casted by people in video surveillance sequences. The obtained results show the usefulness of the proposed solution.

scholarly journals Efficient Motion Detection Algorithm in Video Sequences

2014 ◽  
Vol 13 (3) ◽  
pp. 4329-4334 ◽  
Author(s):  
Aree Ali Mohammed
Keyword(s):  
Motion Detection ◽  
Background Subtraction ◽  
Detection Algorithm ◽  
Human Detection ◽  
Video Sequences ◽  
Background Information ◽  
Morphological Operations ◽  
Shadow Removal ◽  
Subtraction Technique ◽  
Objects Detection

Human  motion  analysis  concerns  the detection,  tracking  and  recognition  of  people  behaviors,  from image  sequences  involving  humans. A  reference  frame  is  initially  used  and  considered  as  background  information. While a new object enters into the frame, the foreground information and background information are identified using the reference frame as background model.In this paper, an efficient algorithm is proposed for objects detection in real time video sequences. The method aims at tracking an object like (human) in motion using background subtraction technique. The tracked objects are subject to different pre and post image processing in order to extract the most important features (frame preprocessing is used for shadow removal using morphological operations). They can be used later for recognition in different security system such as (human detection for surveillance). Experimental results show that the proposed method is very efficient in terms of reliability and accuracy of detection.

Detecting “DeepFakes” in H.264 Video Data Using Compression Ghost Artifacts

2020 ◽  
Vol 2020 (4) ◽  
pp. 116-1-116-7
Author(s):  
Raphael Antonius Frick ◽  
Sascha Zmudzinski ◽  
Martin Steinebach
Keyword(s):  
Image Forensics ◽  
Video Data ◽  
Experimental Results ◽  
Video Sequences ◽  
The Internet ◽  
Video Content ◽  
High Quality ◽  
The Public

In recent years, the number of forged videos circulating on the Internet has immensely increased. Software and services to create such forgeries have become more and more accessible to the public. In this regard, the risk of malicious use of forged videos has risen. This work proposes an approach based on the Ghost effect knwon from image forensics for detecting forgeries in videos that can replace faces in video sequences or change the mimic of a face. The experimental results show that the proposed approach is able to identify forgery in high-quality encoded video content.

Analyse des interactions didactiques lors de l’enseignement du football à l’école Tunisienne

2013 ◽  
Vol 22 (5-6) ◽  
pp. 387-404
Author(s):  
Guerchi Maher ◽  
Makram Zghibi
Keyword(s):  
Physical Education ◽  
Qualitative Methodology ◽  
Video Sequences ◽  
Physical Education Teacher ◽  
Education Teacher ◽  
Social Facts ◽  
Close Observation ◽  
The Impact

Abstract Our research focuses on describing what is really happening when a teacher wants to transmit to pupils - girls and boys - knowledge socially marked as masculine. To describe the processes involved in effective didactic interactions between a teacher a pupil and knowledge, we opted for qualitative methodology, consisting on a close observation of the didactic interactions of a teacher with his pupils (girls and boys). Analysis of the interviews focused especially on the nature of knowledge actually transmitted for girls and boys. The studied video sequences permitted to study the didactic interactions more precisely as are actually happening on the pitch. Both tools allowed us to identify the educational intentions of teachers (specialist or not); women or men in the teaching of football. The results show that teachers’ conceptions influence implicitly or explicitly the modalities of their interventions and the nature of football knowledge transmitted to pupils. This makes us think that the impact of social facts (backgrounds) on Tunisian teachers is great. This phenomenon may lock the physical education teacher in some representations modeling masculine and feminine stereotypes and affect his didactic and teaching contribution. Therefore, the teacher must be aware of the impact of the connotation that may have certain “masculine” practices on his interventions and consequently over the pupils learning (either boys or girls).

ОСОБЕННОСТИ АРХИТЕКТУРЫ И ОСНОВНЫЕ ХАРАКТЕРИСТИКИ АППАРАТНОГО ВИДЕОКОДЕКА СТАНДАРТА H.264 В СОСТАВЕ МИКРОСХЕМЫ 1892ВМ14Я

2020 ◽  
Vol 96 (3s) ◽  
pp. 89-96
Author(s):  
А.А. Беляев ◽  
Я.Я. Петричкович ◽  
Т.В. Солохина ◽  
И.А. Беляев
Keyword(s):  
Data Flow ◽  
System On Chip ◽  
Video Codec ◽  
Experimental Results ◽  
Video Sequences ◽  
Ip Core ◽  
Performance Measurements ◽  
Synchronization Mechanism ◽  
Architectural Features ◽  
On Chip

Рассмотрены особенности архитектуры и основные характеристики аппаратного видеокодека по стандарту H.264, входящего в состав микросхемы 1892ВМ14Я (MCom-02). Описан механизм синхронизации потоков данных на основе набора флагов событий. Приведены экспериментальные результаты измерения характеристик производительности разработанного видеокодека на реальных видеосюжетах при различных форматах передаваемого изображения. The paper considers main architectural features and characteristics of H.264 hardware video codec IP-core as a part of MCom- 02 system-on-chip (SoC). Bedides, it presents data flow synchronization mechanism based on event flags set, as well as experimental results of performance measurements for the designed video codec IP-core obtained for different video sequences and different image formats.

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