Results 11 to 20 of about 3,840,697 (280)

Representing addition and subtraction : learning the formal conventions [PDF]

open access: yes, 2001
The study was designed to test the effects of a structured intervention in teaching children to represent addition and subtraction. In a post-test only control group design, 90 five-year-olds experienced the intervention entitled Bi-directional ...
Maclellan, Effie
core   +4 more sources

Automatic object detection based on adaptive background subtraction using symmetric alpha stable distribution [PDF]

open access: yes, 2008
Automatic detection of objects is critical to video tracking systems. One of the simplest techniques for detection is background subtraction (BS). BS refers to the process of segmenting moving regions from image sequences.
Bhaskar, H., Maskell, S., Mihaylova, L.
core   +4 more sources

Video foreground detection based on symmetric alpha-stable mixture models. [PDF]

open access: yes, 2010
Background subtraction (BS) is an efficient technique for detecting moving objects in video sequences. A simple BS process involves building a model of the background and extracting regions of the foreground (moving objects) with the assumptions that the
Bhaskar, H.   +2 more
core   +5 more sources

Articulated Human Body Parts Detection Based on Cluster Background Subtraction and Foreground Matching [PDF]

open access: yes, 2013
Detecting people or other articulated objects and localizing their body parts is a challenging computer vision problem as their movement is unpredictable under circumstances of partial and full occlusions.
Mihaylova, Lyudmila   +2 more
core   +5 more sources

Foreground detection of video through the integration of novel multiple detection algorithims [PDF]

open access: yes, 2013
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel UniversityThe main outcomes of this research are the design of a foreground detection algorithm, which is more accurate and less time consuming than existing ...
Nawaz, Muhammad
core   +6 more sources

Background subtraction techniques: a review [PDF]

open access: yes2004 IEEE International Conference on Systems, Man and Cybernetics (IEEE Cat. No.04CH37583), 2005
Background subtraction is a widely used approach for detecting moving objects from static cameras. Many different methods have been proposed over the recent years and both the novice and the expert can be confused about their benefits and limitations.
openaire   +2 more sources

Value of Image Subtraction for the Identification of Hepatocellular Carcinoma Capsule on Gadoxetic Acid-Enhanced MRI

open access: yes대한영상의학회지, 2018
Purpose To evaluate value of image subtraction for identifying hepatocellular carcinoma (HCC) capsule on gadoxetic acid-enhanced MR images. Materials and Methods This study involved 108 patients at risk of HCC preoperatively examined using ...
Hyunjung Kim   +3 more
doaj   +1 more source

ROLE OF CONTRAST ENHANCED DIGITAL MAMMOGRAPHY IN BREAST LESIONS [PDF]

open access: yesAin Shams Medical Journal, 2020
Back ground: Breast cancer in women is major public health problem throughout the world, Mammography is basic breast imaging modality for early detection and diagnosis of breast cancer, mammography has its own limitations so contrast enhanced digital ...
Rabab Abdelmoniem   +3 more
doaj   +1 more source

Comparison of Accuracy of Conventional Periapical Radiography and Direct Digital Subtractions Radiography with or without Image Enhancement in the Diagnosis of Density Changes

open access: yesJournal of Dental Research, Dental Clinics, Dental Prospects, 2012
Background and aims. In periapical radiographic technique, the changes will be visible only after considerable deposition or resorption while digital subtraction technique visualizes slight density changes. This study was aimed to compare visualization
Tahmineh Razi   +2 more
doaj   +1 more source

On the accuracy of techniques for determining neutron compound-nucleus formation cross sections

open access: yesEPJ Web of Conferences, 2010
We consider three methods for determining neutron nonelastic cross sections: direct measurement by transmission of neutrons through a spherical shell; subtraction of the angle-integrated elastic cross section from the total cross section; and a ...
Dietrich F.S.
doaj   +1 more source

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