In this work, a foldable ring-shaped light-emitting diode (LED) lighting assembly, designed to attach to a rubber wound retractor, is realized and tested through porcine animal experiments. Enabled by the small size and the high efficiency of LED chips, the lighting assembly is compact, flexible, and disposable while providing direct and high brightness lighting for more uniform background illumination in video-assisted thoracic surgery (VATS). When compared with a conventional fiber bundle coupled light source that is usually used in laparoscopy and endoscopy, the much broader solid angle of illumination enabled by the LED assembly allows greatly improved background lighting and imaging quality in VATS.
Content-based image search has long been considered a difficult task.
Making correct conjectures on the user intention (perception) based
on the query images is a critical step in the content-based search.
One key concept in this paper is how we find the user preferred image
characteristics from the multiple positive samples provided by the
user. The second key concept is that when the user does not provide
a sufficient number of samples, how we generate a set of consistent
"pseudo images". The notion of image feature stability is thus
introduced. The third key concept is how we use negative images as
pruning criterion. In realizing the preceding concepts, an image search scheme is developed using the weighted low-level image features. At the end, quantitative simulation results are used to show the effectiveness of these concepts.
We design and implement a research friendly software platform, which aims at the flexibility and the abstraction of MPEG-7 application prototyping. We studied and analyzed the MPEG-7 standard, including a typical scenario of using MPEG-7. In order to fulfill to needs of researches, in addition to the normative parts of MPEG-7, additional requirements are included. By examining these requirements, we propose a research friendly software platform. The architecture consists of a framework, utility units, and the descriptors. Because this system is implemented using Java, it also incorporates the features of the Java environment, and thus it is flexible for developing new components and prototyping applications. We demonstrate the flexibility of this testbed by constructing an example program which allows users to manipulate image related descriptors.
The purpose of this project is to develop a simplified DAVIC server on the Sun workstations under Unix and X window environment. DAVIC 1.0 is a comprehensive set of standards that define various types of end-to-end multi-media communication systems. More precisely, we implement only the high level server-client protocols and server service elements specified in DAVIC. This system can provide browsing service, download a file or a portion of it, and play back an MPEG sequence with VCR-like control. Limited by time, manpower and tools, not all the DAVIC specified elements are fully implemented. However, an implementation of a simple video server based on the DAVIC concept has been completed and demonstrated.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.