Detecting partially occluded ellipses using the Hough transform
Image and Vision Computing - 4th Alvey Vision Meeting
A new curve detection method: randomized Hough transform (RHT)
Pattern Recognition Letters
Computer graphics: principles and practice (2nd ed.)
Computer graphics: principles and practice (2nd ed.)
Extracting geometric primitives
CVGIP: Image Understanding
Proceedings of the 25th annual conference on Computer graphics and interactive techniques
Use of the Hough transformation to detect lines and curves in pictures
Communications of the ACM
An efficient randomized algorithm for detecting circles
Computer Vision and Image Understanding
Augmented Chemistry: An Interactive Educational Workbench
ISMAR '02 Proceedings of the 1st International Symposium on Mixed and Augmented Reality
Emerging frameworks for tangible user interfaces
IBM Systems Journal
Tangible Photorealistic Virtual Museum
IEEE Computer Graphics and Applications
The SQUASH 1000 Tangible User Interface System
ISMAR '05 Proceedings of the 4th IEEE/ACM International Symposium on Mixed and Augmented Reality
The SQUASH 1000 Tangible User Interface System
ISMAR '05 Proceedings of the 4th IEEE/ACM International Symposium on Mixed and Augmented Reality
Proceedings of the 4th International Conference on Fun and Games
Real-time color ball tracking for augmented reality
EGVE'08 Proceedings of the 14th Eurographics conference on Virtual Environments
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A common task in computer entertainment is the ability to interact with virtual 3D objects. Interacting with these objects using standard computer input devices such as a mouse and keyboard can often be a difficult task. For this reason, Tangible User Interfaces (TUIs) were developed to allow more natural interaction with complex virtual objects by manipulating physical objects in a familiar way. Applying the movements of a physical object to control the movement of a virtual object is often done by embedding devices in the physical object, or by passively tracking the object. We present a new TUI system that includes a passive optical tracking method to determine the six degree-of-freedom (DOF) pose of a sphere in a real-time video stream, and then apply the pose to a virtual object. Our tracking system is based on standard computer vision techniques and applications of 3D geometry. The pose of the sphere is accurately resolved under partial occlusions, allowing the object to be manipulated by hand without a tracking failure. We demonstrate the use of our TUI system to control virtual 3D objects in an interactive way, proving to be a useful tool for computer entertainment applications.