Ikhlas Abdelqader's research while affiliated with Western Michigan University and other places

Publications (10)

Article
The transportation infrastructure in the United States is deteriorating and will require significant improvements. Consequently, innovations in the area of transportation infrastructure maintenance and rehabilitation are keys to the health and wellness of this valuable national asset. A major component of maintenance and rehabilitation is the abili...
Conference Paper
The condition of the transportation network in the United States is Deteriorating and will require enormous efforts to significantly improve its state. Out of the 600 thousand bridges, almost 14% is structurally obsolete and another 14% is functionally obsolete. Concrete bridge condition assessment is a challenge to bridge inspectors because of the...
Conference Paper
Ground Penetrating Radar (GPR) is a nondestructive testing method used to test the integrity of roads, pavements, bridges and buildings. GPR uses high frequency electromagnetic waves at the Microwave or Radio Frequency range to investigate the subsurface. It is used to measure features such as pavement layer thickness, moisture content, horizontal...
Conference Paper
Visual inspection is the commonly used method for bridge deck inspection. However, this method depends on the intuition of the inspector and his experience. The deteriorated condition of the nation's infrastructure requires better techniques for evaluation. Nondestructive evaluation can verify the integrity of a structure or any of its components w...
Article
In this paper a new algorithm to estimate dense displacement fields from a sequence of images is developed. The algorithm is based on modeling the displacement fields as Markov Random fields. The Markov Random fields-Gibbs equivalence is then used to convert the problem into one of finding an appropriate energy function that describes the motion an...
Conference Paper
The problem of motion estimation is formalized as a problem in nonlinear optimization. The algorithm is based on modeling the displacement fields as Markov random fields. The Markov random fields-Gibbs distribution equivalence is used to convert the problem into one of finding an appropriate energy function that describes the motion fields. Mean fi...
Article
In this paper, we cast motion estimation as a problem in energy minimization. This is achieved by modeling the displacement field as a Markov random field. The equivalence of a Markov random field and a Gibbs distribution is then used to convert the problem into one of defining an appropriate energy function that describes the motion and any constr...
Conference Paper
A novel method for obtaining dense displacement fields from a sequence of frames is presented. The algorithm is based on modeling the displacement field as a Markov random field, hence making it possible to use the equivalence of a Markov random field and a Gibbs distribution. The Gibbs distribution is used to define a mean field probability densit...
Article
Thesis (Ph. D.)--North Carolina State University. Includes bibliographical references (leaves 113-124).

Citations

... For instance, the earliest study in the United States that attempted using GPR to image concrete delamination in bridge decks dates back to 2001 [4]. Continuing efforts have been made for both bridge decks [5][6] as well as for rigid pavement [7]. Unfortunately, the mixed results reported in those studies have led to a general perception that GPR is unable to image the presence of delamination directly [1]. ...
... In addition to the visual inspection of the images, Equations (2) and (3) A similar procedure was followed by the authors and others [15,[46][47][48][49][50]. Furthermore, for each spectrometer, it was tested at two locations (L = left and R right) for each pipe, as shown in Figure 8b. ...
... These techniques cover small areas and require experts to test and analyze the data. Yehia et al. [21] stated that IRT is the fastest technique in terms of data collection. However, the accuracy of IRT is vulnerable to the variations in field conditions, so inspectors find it difficult to localize the damaged zones within concrete [22]. ...
... Where u represents the update to be found. The function for I() given in equation 13.7 can then be linearised using a Taylor expansion 1 about (x + q k (f) + d 0 n;n+1 + P d m;m+1 ; n + f), which represents the current displacement in both previous and next frames 2 . The form of the next expression is unwieldy unless the following de nition is made. ...