In this paper, we investigate a practical framework to compute a 3D shape estimation of multiple objects in real-time from silhouette probability maps in multi-view environments. A popular method called Shape From Silhouette (SFS), computes a 3D shape estimation from binary silhouette masks. This method has several limitations: The acquisition space is limited to the intersection of the camera ...

In this paper, we investigate a practical framework to compute a 3D shape estimation of multiple objects in real-time from silhouettes in multi-view environments. A popular method called Shape From Silhouette (SFS), computes a 3D shape estimation from binary silhouette masks. This method has several limitations: The acquisition space is limited to the intersection of the camera viewing frusta ;...

Projection systems have become the ubiquitious infrastructure for presentation technology. How-ever, unless the projector is precisely aligned to the presentation screen, the resulting image suffersfrom perspective (keystone) distortions requiring manual optical or digital correction. This tediousprocess must be repeated whenever the projector or screen is moved and is increasingly ...

INTRODUCTION Bipolar vessel-sealing devices (VSDs) have advantages in urological surgeries (less hemorrhage, shorter operating time). However, these instruments can cause thermal injuries, which can result in neural damage and necrosis. The objectives of this study were to establish a reproducible in vitro model for standardized assessment of electrosurgical devices and to evaluate whether opti...

Manipulation systems for planetary exploration operate under severe limitations due to power and weight restrictions and extreme environmental conditions. Typically such systems employ carefully calibrated stereo cameras and carefully calibrated manipulators to achieve precision on the order of ten millimeters with respect to instrument placement activities. The environmental and functional res...

W e derived a quant i tat ive measure of t he ability of a camera setup t o observe the changes in image features due t o relative m o t i o n [ I O ] . Thrs measure of motion perceptibility has m a n y applications in evaluating a robot hand /eye setup w i th respect t o t h e ease of achieving vision-based control, and steering away f r o m singular configurat ions. M o t i o n perceptibil i ...

Incorrect angular placement of the acetabular cup in total hip replacement induces femoral head dislocation, osteolysis, and liner wearing. Some computer-assisted navigation systems to aid acetabular cup placement have been developed in the past decade, but these are not used extensively due to their expense. In this study, a novel algorithm to determine the positions of data points in three-di...

This paper describes a book placement and book searching method for performance enhancement of existing library systems in Pakistan. The book placement mechanism is used to ensure the placement of book inside the shelf according to assigned code to facilitate manual searching. The prototype system uses a web camera to capture the title page of the book. The image is processed to extract the tit...

With the proliferation of sensors of various kinds, especially cameras, large-scale situation awareness applications employing camera networks will become common place. These applications are inherently distributed, dynamic, interactive, run 24×7, and generate spatiotemporal events that need to be stored and retrieved in a timely manner to satisfy real-time constraints. To address these challen...

This report outlines a series of vision-based algorithms for data collection at traffic intersections. We have purposed an algorithm for obtaining sound spatial resolution, minimizing occlusions through an optimization-based camera-placement algorithm. A camera calibration algorithm, along with the camera calibration guided user interface tool, is introduced. Finally, a computationally simple d...