scholarly journals Remote Respiration Rate Determination in Video Data - Vital Parameter Extraction based on Optical Flow and Principal Component Analysis

2017 ◽  
Author(s):  
Christian Wiede ◽  
Julia Richter ◽  
Manu Manuel ◽  
Gangolf Hirtz
Keyword(s):  
Principal Component Analysis ◽  
Optical Flow ◽  
Respiration Rate ◽  
Principal Component ◽  
Parameter Extraction ◽  
Component Analysis ◽  
Video Data ◽  
Vital Parameter

scholarly journals Visual Analysis and Recognition of Crowd Behavior by Principal Component Analysis

2021 ◽  
Vol 1 (2) ◽  
pp. 99-108
Author(s):  
Hocine Chebi ◽  
Dalila Acheli ◽  
Mohamed Kesraoui
Keyword(s):  
Principal Component Analysis ◽  
Optical Flow ◽  
Human Behavior ◽  
Visual Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Wide Field ◽  
Crowd Behavior ◽  
New Approach ◽  
Field Of Vision

The analysis of the human behavior from video is a wide field of the vision by computer. In this work, we are presenting mainly a new approach and method of detects behavior or abnormal events continuous of crowd in the case of the dangerous situations. These scenes are characterized by the presence of a great number of people in the camera’s field of vision. A major problem is the development of an autonomous approach for the management of a great number of anomalies which is almost impossible to carry out by operators. We present in this paper an approach for the anomalies detection, the visual sequences of the video are detected like behavior normal or abnormal based on the measurement and the extraction of the points by the optical flow, then calculations of the distance between the matrices of covariance of the distributions of the vectors of movement calculated on the consecutive reinforcements.

Combination of principal component analysis and optical-flow motion compensation for improved cardiac MR thermometry

2017 ◽  
Vol 62 (4) ◽  
pp. 1208-1224 ◽  
Author(s):  
S Toupin ◽  
B Denis de Senneville ◽  
V Ozenne ◽  
P Bour ◽  
M Lepetit-Coiffe ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Optical Flow ◽  
Motion Compensation ◽  
Principal Component ◽  
Component Analysis ◽  
Mr Thermometry ◽  
Cardiac Mr ◽  
Flow Motion

A German version of the Intermittent Claudication Questionnaire (ICQ): cultural adaptation and validation

VASA ◽  
2012 ◽  
Vol 41 (5) ◽  
pp. 333-342 ◽  
Author(s):  
Kirchberger ◽  
Finger ◽  
Müller-Bühl
Keyword(s):  
Principal Component Analysis ◽  
Intermittent Claudication ◽  
Completion Time ◽  
Short Form ◽  
Principal Component ◽  
Component Analysis ◽  
German Version ◽  
Average Completion Time ◽  
Sf 36 ◽  
Related Quality

Background: The Intermittent Claudication Questionnaire (ICQ) is a short questionnaire for the assessment of health-related quality of life (HRQOL) in patients with intermittent claudication (IC). The objective of this study was to translate the ICQ into German and to investigate the psychometric properties of the German ICQ version in patients with IC. Patients and methods: The original English version was translated using a forward-backward method. The resulting German version was reviewed by the author of the original version and an experienced clinician. Finally, it was tested for clarity with 5 German patients with IC. A sample of 81 patients were administered the German ICQ. The sample consisted of 58.0 % male patients with a median age of 71 years and a median IC duration of 36 months. Test of feasibility included completeness of questionnaires, completion time, and ratings of clarity, length and relevance. Reliability was assessed through a retest in 13 patients at 14 days, and analysis of Cronbach’s alpha for internal consistency. Construct validity was investigated using principal component analysis. Concurrent validity was assessed by correlating the ICQ scores with the Short Form 36 Health Survey (SF-36) as well as clinical measures. Results: The ICQ was completely filled in by 73 subjects (90.1 %) with an average completion time of 6.3 minutes. Cronbach’s alpha coefficient reached 0.75. Intra-class correlation for test-retest reliability was r = 0.88. Principal component analysis resulted in a 3 factor solution. The first factor explained 51.5 of the total variation and all items had loadings of at least 0.65 on it. The ICQ was significantly associated with the SF-36 and treadmill-walking distances whereas no association was found for resting ABPI. Conclusions: The German version of the ICQ demonstrated good feasibility, satisfactory reliability and good validity. Responsiveness should be investigated in further validation studies.

Sign in / Sign up

Export Citation Format

Share Document