Minimum Probability of Error Image Retrieval
نویسندگان
چکیده
منابع مشابه
Minimum Probability of Error Image Retrieval: From Visual Features to Image Semantics
The recent availability of massive amounts of imagery, both at home and on the Internet, has generated substantial interest in systems for automated image search and retrieval. In this work, we review a principle for the design of such systems, which formulates the retrieval problem as one of decision-theory. Under this principle, a retrieval system searches the images that are likely to satisf...
متن کاملThe Minimum Error Minimax Probability Machine
We construct a distribution-free Bayes optimal classifier called the Minimum Error Minimax Probability Machine (MEMPM) in a worst-case setting, i.e., under all possible choices of class-conditional densities with a given mean and covariance matrix. By assuming no specific distributions for the data, our model is thus distinguished from traditional Bayes optimal approaches, where an assumption o...
متن کاملMinimum Probability of Error in Sparse Wideband Channels
This paper studies the impact of channel coherence and the role of channel state information (CSI) on the probability of error in wideband multipath fading channels. Inspired by recent ultra wideband channel measurement campaigns, we propose a sparse channel model for time and frequency selective fading in which the number of resolvable channel paths grow sub-linearly with signal space dimensio...
متن کاملMinimum probability of error for asynchronous Gaussian multiple-access channels
Ahstruct-Consider a Gaussian multiple-access channel shared by K users who transmit asynchronously independent data streams by modulating a set of assigned signal waveforms. The uncoded probability of error achievable by opt imum multiuser detectors is investigated. It is shown that the K-user maximum-likel ihood sequence detector consists of a bank of single-user matched filters followed by a ...
متن کاملMinimum Probability of Error-Based Equalization Algorithms for Fading Channels
Novel channel equalizer algorithms are introduced for wireless communication systems to combat channel distortions resulting from multipath propagation. The novel algorithms are based on newly derived bounds on the probability of error (PE) and guarantee better performance than the traditional zero forcing (ZF) or minimum mean square error (MMSE) algorithms. The new equalization methods require...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Signal Processing
سال: 2004
ISSN: 1053-587X
DOI: 10.1109/tsp.2004.831125