Papers by Hamed Babaei Aghdam
2014 IEEE International Conference on Control System, Computing and Engineering (ICCSCE 2014), 2014
There is a special type of concrete pipe beneath the roads in Malaysia which is called culvert. D... more There is a special type of concrete pipe beneath the roads in Malaysia which is called culvert. Detecting the place of damages in these pipes is important for maintenance operations. Pipe inspection robots are one of the most reliable ways to achieve this goal. Because of the wheel slippage, low speed motion and dynamic changes in kinematic of the robot, the INS and wheel encoder methods are not accurate enough for localizing the robot inside a culvert. In this paper, we propose a solution based on monocular visual odometry. We show that although the surface of the culvert is not flat, nevertheless, by selecting an appropriate camera the optical flow of the pixels inside a small area near the center of the image is almost equal and for this reason the 3D motion of the robot can be estimated using the derivative of camera parameters. The experimental result shows this method is reliable and can be successfully used for localizing the robot inside the culverts.
Lecture Notes in Computer Science, 2009
There are several feature extracting techniques which can produce a large feature space for a giv... more There are several feature extracting techniques which can produce a large feature space for a given image. It is clear that only small numbers of these features are appropriate to classify the objects. But selecting an appropriate feature vector from the large feature space is a hard optimization problem. In this paper we address this problem using the well known
Procedia - Social and Behavioral Sciences, 2014
The aim of this study was to investigate the effectiveness of incorporating culturally-loaded mat... more The aim of this study was to investigate the effectiveness of incorporating culturally-loaded materials like literature in EFL courses. We selected short story as an example of literature to be included in our course syllabus. After that, some eclectic short stories from "Chicken Soup for the Soul" were selected. 14 students were randomly selected and assigned to two classes as control group and experimental groups. Finally, by comparing the mean and median of their final scores, we found that the experimental group outperformed the control group both in the final exam and also during the term considering classroom discussions.
2008 International Conference on Computer Science and Information Technology, 2008
Abstract Grid Computing aims to allow unified access to data, computing power, sensors and other ... more Abstract Grid Computing aims to allow unified access to data, computing power, sensors and other resources through a single virtual laboratory. The development or adaptation of applications for Grid environments is being challenged by the need of scheduling a large number of tasks and resources efficiently. The general problem of optimally mapping tasks to machines in a heterogeneous computing suite has been shown to be NP-complete. In this paper we propose a modified simulated annealing algorithm for scheduling independent ...
2009 Second International Conference on Environmental and Computer Science, 2009
Abstract Many real-time systems are in fact isochronal, where both early and late responses are h... more Abstract Many real-time systems are in fact isochronal, where both early and late responses are harmful to the system or lead to lower quality of service. Task scheduling problems in real-time systems proved that are NP-hard problems. Therefore, heuristic search strategies can be applied to these problems. In this paper, a simulated annealing algorithm is proposed for static task scheduling in non-overloaded isochronal soft real-time systems. The main objective of proposed algorithm is maximizing the total accumulated utility of jobs. ...
2008 15th International Conference on Systems, Signals and Image Processing, 2008
Corner detection is widely used in image processing and machine vision. Hence, different corner d... more Corner detection is widely used in image processing and machine vision. Hence, different corner detectors are proposed. But the performance of such corner detectors is sensitive to round effect and curve shape of the edges. In this paper we propose a novel corner detector that either over come corner detection problems and produces some information about detected corners that is very useful in segmentation and object recognition.
Computational and Mathematical Methods in Medicine, 2013
The extraction of the breast boundary is crucial to perform further analysis of mammogram. Method... more The extraction of the breast boundary is crucial to perform further analysis of mammogram. Methods to extract the breast boundary can be classified into two categories: methods based on image processing techniques and those based on models. The former use image transformation techniques such as thresholding, morphological operations, and region growing. In the second category, the boundary is extracted using more advanced techniques, such as the active contour model. The problem with thresholding methods is that it is a hard to automatically find the optimal threshold value by using histogram information. On the other hand, active contour models require defining a starting point close to the actual boundary to be able to successfully extract the boundary. In this paper, we propose a probabilistic approach to address the aforementioned problems. In our approach we use local binary patterns to describe the texture around each pixel. In addition, the smoothness of the boundary is handl...
Uploads
Papers by Hamed Babaei Aghdam