Udaya Wijenayake

Udaya Wijenayake
University of Sri Jayewardenepura · Department of Computer Engineering

PhD

About

19
Publications
7,295
Reads
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79
Citations
Additional affiliations
August 2018 - present
University of Sri Jayewardenepura
Position
  • Professor (Associate)
August 2017 - July 2018
University of Sri Jayewardenepura
Position
  • Lecturer
March 2011 - July 2017
Kyungpook National University
Position
  • PhD Student
Education
March 2013 - February 2018
Kyungpook National University
Field of study
  • Computer Vision
March 2011 - February 2013
Kyungpook National University
Field of study
  • Computer Vision
July 2006 - August 2010
University of Colombo
Field of study
  • Computer Science

Publications

Publications (19)
Conference Paper
Full-text available
Conservation of water has become an essential in the current world due to the swelling stress on the world's total consumable water, which has been affected by the inexorable rise in the usage and other multiple factors. This study focuses on micro factors that occur in household water usage, which leads up to a much more significant impact collect...
Article
Full-text available
Accurate tracking and modeling of internal and external respiratory motion in the thoracic and abdominal regions of a human body is a highly discussed topic in external beam radiotherapy treatment. Errors in target/normal tissue delineation and dose calculation and the increment of the healthy tissues being exposed to high radiation doses are some...
Article
Bin picking is a task of picking a small object from a bin. For accurate bin picking, the 3D pose information, position, and orientation of a small object is required because the object is mixed with other objects of the same type in the bin. Using this 3D pose information, a robotic gripper can pick an object using exact distance and orientation m...
Conference Paper
Human respiration induces considerable external and internal motion in the thoracic and abdominal regions. Tracking and modeling of this motion is an important task for accurate treatment planning and dose calculation during external beam radiotherapy. Inaccurate motion tracking can cause severe issues such as errors in target/normal tissue delinea...
Article
Full-text available
In the field of computer vision and robotics, bin picking is an important application area in which object pose estimation is necessary. Different approaches, such as 2D feature tracking and 3D surface reconstruction, have been introduced to estimate the object pose accurately. We propose a new approach where we can use both 2D image features and 3...
Article
Full-text available
Abstract. The accurate and dense real-time acquisition of three-dimensional (3-D) data using a low-cost structured light system remains an ongoing topic in the computer vision community, as it is difficult to achieve all these features simultaneously. Among several techniques, the pseudorandom array technique is widely used in real-time 3-D scene c...
Article
Full-text available
As radiotherapy has become one of the widely used techniques in cancer treatment, accurate tracking of patient's respiratory motion is considered to be more important in treatment planning and dose calculations. Inaccurate motion tracking can cause severe issues such as errors in target/normal tissue delineation and increasing the volume of healthy...
Conference Paper
Full-text available
Respiratory motion is an important issue in radiotherapy as it can cause many problems such as damages to healthy tis-sues. Different methods have been introduced to estimate the respiratory motion but most of them need some electronic devices or expensive materials. In this research, we proposed a respiratory motion estimation method by tracking i...
Conference Paper
Full-text available
Close-range Photogrammetry is widely used in many industries because of the cost effectiveness and efficiency of the technique. In this research, we introduce an automated coded target detection method which can be used to enhance the efficiency of the Photogrammetry.
Conference Paper
Full-text available
In this paper, we introduce an efficient way for extrinsic calibration between a LRF and a camera. By utilizing multiple edges of a known 3D structure, we derived a simple but robust calibration method. Through 3D reconstruction experiments, we verified the accuracy of the proposed method.
Conference Paper
Full-text available
Head pose tracking is one of the important criteria for improving the abilities of the human computer interactions and the human robot interactions. With the improvement of low cost consumer depth cameras lot of research attention attracted to the 3D based head pose estimation which is more accurate and robust to the environment conditions. In this...
Conference Paper
Full-text available
Acquisition of 3D data accurately and densely in real time using a low cost structured light system is still an ongoing topic among the computer vision community as it is hard to achieve all these features together. Among several techniques the pseudorandom array technique is widely used in real time 3D scene capturing as it tends to concentrate th...
Conference Paper
Full-text available
Designing a low cost structured light system which can acquire 3D data in real time with great accuracy is still an ongoing topic among computer vision community as it is hard to achieve all these features together. Among various structured light systems, pseudorandom array is the most suitable technique for real time 3D reconstruction as it tends...
Conference Paper
Full-text available
Much research has been conducted so far to find a perfect structured light coding system. Among them, spatial neighborhood techniques which use a single pattern have become more popular as they can be used for dynamic scene capturing. But the difficulties of decoding the pattern when it loses few pattern symbols still remain as a problem. As a solu...
Conference Paper
Full-text available
Much research has been conducted so far to find a perfect structured light coding system. One of the main problems of those introduced structured light systems is keeping a simple decoding method even for the larger pattern resolutions. Our main concern of this research is to introduce a new encoding strategy to solve the above problem based on M-a...

Questions

Questions (3)
Question
Is there any device to measure the respiratory volume consecutively for a given time period ? I have heard about Spirometer, but I'm not sure whether it measures only one respiratory cycle or consecutive respiratory cycles.
Question
Can anyone provide some good references for non-rigid 3D registration techniques?
Question
Is there any technique that can be used to measure the accuracy of head pose estimation to do some quantitative experiments ?

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