Recent Publications

• Publications from 2008
• Publications from 2007
• RoboCup for the Mechanically, Athletically and Culturally Challenged
• 3D Visual Debug Montior for Robo Cup
• Preclinical ROC Studies of Digital Stereomammography
• Visible Light and X-Ray Ray Tracing of Generalized Cylinders
• Digital Stereomammography
• A Geometric Modeling Tool for Visualization of Human Anaomical Structures
• Application of Stereo Techniques to Angiography: Qualitative and Quantitative Approaches
• Design of studies to test the effectiveness of stereo imaging / Truth or Dare: Is stereo viewing really better?
• A study of the effectiveness of stereo imaging with applications in mammography
• Rapid Object Recognition from a Large Model Database
• Archive site of a magazine I wrote a series of Computer Chess articles for many years ago.

Papers:

Nykl, S., Mourning, C., Leitch, M., Chelberg, D., Franklin, T., & Lui, C. (2008). "An Overview of the STEAMiE Educational Game Engine." 38th ASEE/IEEE Fronteirs in Education Conference. Saratoga Springs, NY.

J. Schendel, Chelberg, D., Franklin, T., & Lui, C. (2008). "Virtual Gallery Walk, an Innovative Outlet for Sharing Student Research Work in K-12 Classrooms." 38th ASEE/IEEE Fronteirs in Education Conference. Saratoga Springs, NY.

B. Bilyeu, C. Liu, T. Franklin, D. Chelberg, "Using Games Created in Second Life to Teach Middle School Science Content," Second Life Education Community Conference, Sept. 6, 2008.

M. Smearcheck, T. Franklin, L. Washington, L. Peng, D. Chelberg "Games in the Science Classroom," Proceedings SITE 2008--Society for Information Technology & Teacher Education International Conference, Las Vegas, Nevada, USA, March 3-7, 2008. Pp. 4784-4790.

Presentations:

B. Bilyeu, J. Schendel, T. Cooper, T. Franklin, C. Liu, D. Chelberg, "Using Games for Real World Middle School Science Education," at eTech Ohio, Columbus Ohio, 4 Feb. 2008.

M. Smearcheck, E. Pitre, T. Franklin, C. Liu, D. Chelberg, "Designing Flash Games for Middle School Science Education," at eTech Ohio, Columbus, Ohio, Feb. 2008.

Nykl, S., Mourning, C., Leitch, M., Chelberg, D., Franklin, T., & Lui, C. (2008). "An Overview of the STEAMiE Educational Game Engine." 38th ASEE/IEEE Fronteirs in Education Conference. Saratoga Springs, NY.

J. Schendel, Chelberg, D., Franklin, T., & Lui, C. (2008). "Virtual Gallery Walk, an Innovative Outlet for Sharing Student Research Work in K-12 Classrooms." 38th ASEE/IEEE Fronteirs in Education Conference. Saratoga Springs, NY.

T. Cooper, J. Flores, A. Goodnite, D. Chelberg, T. Franklin, C. Liu, "Second Life 3D Educational Module Workshop," NSF GK-12 Regional Conference, West Lafayette, IN, Nov. 2008.

B. Young, Y. Fang, D. Chelberg, T. Franklin, C. Liu, A. Goodnite, "3D Stand-alone Educational Workshop One," NSF GK-12 Regional Conference, West Lafayette, IN, Nov. 2008.

T. Cooper, J. Flores, A. Goodnite, D. Chelberg, T. Franklin, C. Liu, "2D Flash Educational Module Workshop," NSF GK-12 Regional Conference, West Lafayette, IN, Nov. 2008.

B. Young, Y. Fang, D. Chelberg, T. Franklin, C. Liu, A. Goodnite, "3D Stand-alone Educational Workshop Two," NSF GK-12 Regional Conference, West Lafayette, IN, Nov. 2008.

"NSF GK-12 Experiences," Chad Mourning, Tim Taylor, NSF Noyes Conference, Washington, D.C. September 2008.

T. Cooper, C. Liu, T. Franklin, D. Chelberg, "Weather Challenge," Shawnee State Game Conference 6.0, Portsmouth, Ohio, 10/31/08.

A. Goodnite, C. Liu, T. Franklin, D. Chelberg,"Ohio Teen Island Demonstration and Booth," Shawnee State Game Conference 6.0, Portsmouth, Ohio, 10/31/08.

J. Flores, J. Yerardi, B. Young, C. Liu, T. Franklin, D. Chelberg, "A Demonstration of Two Visually Immersive Game Designs For The Steam Project," Shawnee State Game Conference 6.0, Portsmouth, Ohio, 10/31/08.

Panels:

"Sustainability," NSF GK-12 Regional Conference, West Lafayette, IN, Nov. 2008.

T. Franklin, C. Liu, D. Chelberg, "The Impact of Second Life on Classroom Learning," at eTech Ohio, Columbus Ohio, 4 Feb. 2008.

"Enriching STEM Education through Games and Simulations," David Chelberg, Ohio University, USA; Judy Perry, MIT Scheller Teacher Education Program, USA; Len Annetta, North Carolina State University, USA; Michael Searson, Center for Innovative Education, Kean University, USA, SITE 2008--Society for Information Technology & Teacher Education International Conference, Las Vegas, Nevada, USA, March 3-7, 2008.

2007

Jundong Liu, David Chelberg, Charles Smith, Hima Chebrolu, “Distribution-Based Level Set Segmentation For Brain MR Images,” British Machine Vision Conference (BMVC’07), 10-13 September, Warwick, UK, 2007.

D. Juedes, D. Fleeman, C. Marling, and D. Chelberg “Work-in-progress: Anywhere, Anytime Active Learning and Assessment in Computer Science,” Frontiers In Education (FIE) Conference Proceedings Oct. 10-13, 2007, pp. S1H-9 - S1H-10.

Franklin, T., Mayles, J., Liu, C. & Chelberg, D. (2007). “Games and Engineers in the Middle School Science Classroom: A Case Study.” In C. Crawford et al. (Eds.), Proceedings of Society for Information Technology and Teacher Education International Conference 2007 (pp. 1207-1212). Chesapeake, VA: AACE.

B. Bilyeu, J. Mayles, D. Chelberg, T. Franklin, C. Liu, "Using Second Life to Create Educational Games for Middle School Science Students", Math and Science Symposium, Knoxville, TN, October 14-15, 2007.

Josh Schendel, D. Chelberg, T. Franklin, C. Liu, “Science and Technology Enrichment for Appalachian Middle Schoolers,” SIGCSE Conference, Covington, Kentucky, USA, March 7-10 2007.

Mark Smearcheck, Angela Adams, D. Chelberg, T. Franklin, C. Liu, “Integration of Educational Gaming into Eighth Grade Science Standards,” eTech Ohio Educational Technology Conference, Columbus, Ohio, February 12-14, 2007.

Josh Schendel, Bruce Bilyeu, D. Chelberg, T. Franklin, C. Liu, “Interactive Science, Education in Second Life,” eTech Ohio Educational Technology Conference, Columbus, Ohio, February 12-14, 2007.

T. Franklin, C. Liu, D. Chelberg, “Panel: Adopting the Second Life® Virtual Environment in Teaching and Learning,” eTech Ohio Educational Technology Conference, Columbus, Ohio, February 12-14, 2007.

Bruce Bilyeu, Tessa Cooper, Chang Liu, Teresa Franklin, and David Chelberg, “Designing games in the Second Life virtual world for real world middle school science education,” The Shawnee 5.0 Conference, Portsmouth, Ohio, October 26, 2007.

Mark Smearcheck, Eric Petri, Chang Liu, Teresa Franklin, and David Chelberg, “Designing Flash games for middle school science education,” The Shawnee 5.0 Conference, Portsmouth, Ohio, October 26, 2007. Scott Nykl, Mitch Leitch, Chad Mourning, Chang Liu, Teresa Franklin, and David Chelberg, “Capabilities of Ohio University STEAMiE Educational Game Engine,” The Shawnee 5.0 Conference, Portsmouth, Ohio, October 26, 2007.

Posters:

Mitchell Leitch, Chad Mourning, Keith Macartney, Timothy Taylor, D. Chelberg, T. Franklin, C. Liu, “Interactive Science Education Modules Improve Learning in Appalachian Middle Schools,” eTech Ohio Educational Technology Conference, Columbus, Ohio, February 12-14, 2007.

Joshua Schendel, Bruce Bilyeu, Mary Ann Hopple, Sarah Korte, D. Chelberg, T. Franklin, C. Liu, ”Middle School Education Meets a Virtual World… Second Life®,” eTech Ohio Educational Technology Conference, Columbus, Ohio, February 12-14, 2007.

Eric Petri, Rebecca Hartline, D. Chelberg, T. Franklin, C. Liu, “Educational Video Games Modernizing the Science Curriculum,” eTech Ohio Educational Technology Conference, Columbus, Ohio, February 12-14, 2007.

Scott Nykl, James Wyllie, Kurt Nostrant, Jackie Hlubb, D. Chelberg, T. Franklin, C. Liu, ”Science and Technology Enrichment in Appalachian Middle Schools,” eTech Ohio Educational Technology Conference, Columbus, Ohio, February 12-14, 2007.

Selected prior papers:

Q. Zhou, M. Celenk, L. Ma, and D. Chelberg, "Object detection and recognition via deformable illumination and deformable shape," in Proc. IEEE Int. Conf. Image Processing (ICIP), Oct.8-11, 2006, Atlanta, GA, Pages 2737-2740.

Qiang Zhou, Limin Ma, Mehmet Celenk, David Chelberg, "Content-Based Image Retrieval Based on ROI Detection and Relevance Feedback," Multimedia Tools and Applications, Vol. 27, No. 2, pp. 251-281, 2005.

Q. Zhou, L. Ma, D. Chelberg, J. Xue, E. Peterson and M. Rowe, "A novel machine vision application for analysis and visualization of Confocal microscopic images," Machine Vision and Application, Vol. 16, No. 2, pp. 96-104, 2005.

Limin Ma, David Chelberg, and Mehmet Celenk, "Spatio-temporal modeling of facial expressions using Gabor-wavelets and hierarchical hidden Markov models," Proceedings of IEEE International Conference on Image Processing (ICIP), Vol. 2, pp. 57-60, 2005.

David M. Chelberg, Matthew Gillen, Qiang Zhou, Arvind Lakshmikumar, "3D Visual Debug Montior for Robo Cup," Proceedings of the IASTED International Conference on Computer Graphics and Imaging, November 19-23, 2000, Las Vegas Nevada, USA, pp. 14-19.

This paper describes architecture (3D-VDBM) for distributed three-dimensional visualization and debugging for distributed agents. This architecture is demonstrated through application to the problem of debugging a collection of intelligent agents that play soccer for the RoboCup international competition.

Jean Hsu, Charles F. Babbs, David M. Chelberg, Zygmunt Pizlo, and Edward J. Delp, "Preclinical ROC Studies of Digital Stereomammography," IEEE Transactions on Medical Imaging, Volume 14, Number 2, June 1995, pp318-327. A version is also available as TR-EE-93-47, Purdue University.

This paper reports the diagnostic performance of observers in detecting abnormalities in computer-generated mammogram-like images. A mathematical model of the human breast is defined in which breast tissues are simulated by spheres of different sizes and densities. Images are generated by casting rays from a specified source, through the model, and onto an image plane. Observer performance when using two viewing modalities (stereo versus mono) is compared. In the stereo viewing mode, images are presented to the observer (wearing liquid-crystal display glasses), such that the left eye sees the left image only and the right eye sees the right image only. In this way, the images can be fused by the observer to obtain a sense of depth. In the mono viewing mode, identical images are presented to the left and right eyes so that no depth perception is possible. Observer response data are evaluated using receiver operating characteristic (ROC) analysis to characterize any difference in detectability of abnormalities (in either the density or the arrangement of simulated tissue densities) using the two viewing modes. Our experimental results indicate the clear superiority of stereo viewing for detection of arrangement abnormalities. For detection of density abnormalities, the performance of the two viewing modes is similar. These preliminary results suggest that stereomammography may permit easier detection of certain tissue abnormalities, perhaps providing a route to earlier tumor detection in cases of breast cancer.

Jean Hsu and David M. Chelberg, "Visible Light and X-Ray Ray Tracing of Generalized Cylinders," Computer Vision, Graphics, and Image Processing: Graphical Models and Image Processing, September 1994, Volume 56, Number 5, pp 392-401, A version is also available as TR-EE-93-43, Purdue Univeristy.

A new algorithm for ray tracing generalized cylinders whose axis is an arbitrary three dimensional space curve and whose cross-sectional contour can be varied according to a general sweeping rule is presented. The main restriction placed on the class of generalized cylinders that can be ray-traced is that the sweeping rule of the generalized cylinder must be invertible. This algorithm handles a broader class of generalized cylinders than any other reported ray tracer. It has been integrated into a general geometric modeling system that can render objects utilizing visible light as well as simulated x-rays.

Generalized cylinders are often used in modeling systems because they compactly represent objects. Many commonly occurring objects including snakes, horses, airplanes, flower vases, and organs of the human abdomen such as the stomach and liver can be described naturally and conveniently in terms of one or more generalized cylinder primitives. By extending the class of generalized cylinders that can be conveniently modeled, the presented algorithm enhances the utility of modeling systems based on generalized cylinders. X-ray images of the internal bone structure of a knee joint, and a visible light image of a fan blade assembly are presented.

Here are some images from the paper:

David M. Chelberg, Jean Hsu, Charles F. Babbs, Zygmunt Pizlo, and Edward J. Delp, "Digital Stereomammography," Proceedings of the 2nd International Workshop on Digital Mammography, Excepta Medica International Congress Series 1069, July 1994, pp 181-190, Elsevier Science, York, England.

Some example images from the paper.

Jean Hsu, David M. Chelberg, and Charles F. Babbs, "A Geometric Modeling Tool for Visualization of Human Anaomical Structures," Proceedings of the 1994 IEEE Workshop on Biomedical Image Analysis, Seattle, Washington, June 24-25, 1994, pp. 176-183.

A geometric modeling system for creating and visualizing models of human anatomical structures has been developed. Many structures in the human body such as blood vessels, bones, the breast, and the chest cavity can be naturally modeled using generalized cylinder and quadric primitives. These models can be accurately and efficiently rendered to form simulated transmitted x-ray and reflected visible light images of human anatomy. Stereoscopic images can be easily generated to allow 3D viewing. Representation of organs by geometric models allows easy modification of their size, shape, and grouping relations. Rotation and viewing in arbitrary direction, and anatomical manipulations such as removal of organs to reveal details of surrounding structures, can be accomplished. Some potential applications and sample images generated by our system are presented.

Jean Hsu, Ke Shen, Frank B. Venezia Jr., David M. Chelberg, Leslie A. Geddes, Charles F. Babbs, and Edward J. Delp, "Application of Stereo Techniques to Angiography: Qualitative and Quantitative Approaches," Procceedings of the 1994 IEEE Worksop on Biomedical Image Analysis, Seattle, Washington, June 24-25, 1994, pp. 277-286.

We discuss the use of stereo imaging techniques as a low cost and low radiation dosage means to provide physicians with three-dimensional (3D) information for diagnosis and follow-up care of patients. Instead of using a pair of images obtained from perpendicular directions (as in the case of biplane radiography), we show that if a pair of small-angle stereo x-ray images are obtained, observers can vividly perceive the images in 3D during acquisition, i.e. real-time stereo visualization is possible. In addition, quantitative information such as blood flow measurements and the amount of arterial narrowing can be extracted off-line by using computational stereo algorithms. The potential advantages of using a small-angle stereo-based approach as opposed to biplane angiography are discussed.

J. Hsu, Z. Pizlo, C. F. Babbs, D. M. Chelberg and E. J. Delp, "Design of studies to test the effectiveness of stereo imaging / Truth or Dare: Is stereo viewing really better?", Proceedings of the SPIE Conference on Stereoscopic Displays and Applications V, Volume 2177A, February 6-10, 1994, San Jose, California, pp. 211-222.

To determine the effectiveness of stereo imaging in aiding the detection of objects in a scene, we are conducting experiments in which subjects are shown computer-generated stereo and mono images and are asked to determine if there is an object with particular characteristics in the image. The experimental data are analyzed using receiver operating characteristic (ROC) approaches to determine which types of objects may be easier to detect using stereo viewing. In this paper, issues that arise in the design of ROC studies to determine the statistical effectiveness of stereo imagery are discussed. These include traps and pitfalls such as varying viewing conditions, image intensity differences, ghosting, flicker, the speed/accuracy tradeoff, subjects' stereo acuity, and degree of difficulty in the discrimination task. Our experimental results show that when these problems are properly addressed, stereo viewing increases the sensitivity and specificity of observer performance in detecting subtle features in simulated x-ray transmission images.

J. Hsu, C. F. Babbs, D. M. Chelberg, Z. Pizlo and E. J. Delp, "A study of the effectiveness of stereo imaging with applications in mammography," Proceedings of the SPIE Conference on Image Modeling, Vol. 1904, January 31 - February 4, 1993, San Jose, California, pp. 154-165.

We have conducted a systematic study of the effectiveness of stereo imaging in aiding the detection of abnormalities in soft tissue geometry and density. Experiments have been designed whereby subjects are shown computer generated stereo mammograms and are asked to determine if there is an abnormal object (brighter or regularly arranged) in the mammogram. The experimental data have been analyzed using ROC approaches to determine which types of soft tissue abnormalities may be easier to detect using stereo viewing. Preliminary results suggest that stereo imaging may be more effective than current single view or biplane mammography for detecting abnormal densities and arrangements in soft tissue elements.

J. Ho Yi, D. M. Chelberg. "Rapid Object Recognition from a Large Model Database," Proceedings of the IEEE 2nd CAD-Based Vision Workshop, February 8-11, 1994, Seven Springs Mountain Resort, Champion, PA, pp. 28-35.

A design for a system to perform object recognition from a large model data base is presented, focusing on efficient indexing. We propose a decision-theoretic approach using a Bayesian framework to achieve efficient indexing of model objects. A decision-theoretic measure of the discriminatory power of a feature for a model object is defined in terms of posterior probability. Domain-specific knowledge compiled off-line from CAD model data is used in order to estimate posterior probabilities that define the discriminatory power of features for model objects. Detectability of a feature defined as a function of the feature itself, viewpoint, sensor characteristics, and the feature detection algorithm(s) is also considered in the computation of discriminatory power. In order to speed up the indexing or selection of the correct objects, we generate and verify the object hypotheses for the features detected in the scene in the order of the discriminatory power of these features for model objects.