178,781 research outputs found
Recursive analysis and estimation for the discrete Boolean random set model
Random sets provide a powerful class of models for images containing randomly placed objects of random shapes and orientation. Those pixels within the foreground are members of a random set realization. The discrete Boolean model is the simplest general random set model in which a Bernoulli point process (called a germ process) is coupled with an independent shape or grain process. A typical realization consists of many overlapping shapes. Estimation in these models is difficult owing to the fact that many outcomes of the process obscure other outcomes. The directional one-dimensional (ID) model, in which random- length line segments emanate to the right from germs on the line, is analyzed via recursive expressions to provide a complete characterization of these discrete models in terms of the distributions of their black and white runlengths. An analytic representation is given for the optimal windowed filter for the signalunion- noise process, where both signal and noise are Boolean models. Several of these results are extended to the nondirectional case where segments can emanate to the left and right. Sufficient conditions are presented for a two-dimensional (2D) discrete Boolean model to induce a one dimensional Boolean model on an intersecting line. When inducement holds, the likelihood of runlength observations of the two-dimensional model is used to provide maximum-likelihood estimation of parameters of the 2D model. The ID directional discrete Boolean model is equivalent to the discrete-time infinite-server queue. Analysis for the Boolean model is extended to provide densities for many random variables of interest in queueing theory
Machine learning approach for segmenting glands in colon histology images using local intensity and texture features
Colon Cancer is one of the most common types of cancer. The treatment is
planned to depend on the grade or stage of cancer. One of the preconditions for
grading of colon cancer is to segment the glandular structures of tissues.
Manual segmentation method is very time-consuming, and it leads to life risk
for the patients. The principal objective of this project is to assist the
pathologist to accurate detection of colon cancer. In this paper, the authors
have proposed an algorithm for an automatic segmentation of glands in colon
histology using local intensity and texture features. Here the dataset images
are cropped into patches with different window sizes and taken the intensity of
those patches, and also calculated texture-based features. Random forest
classifier has been used to classify this patch into different labels. A
multilevel random forest technique in a hierarchical way is proposed. This
solution is fast, accurate and it is very much applicable in a clinical setup
Extended Object Tracking: Introduction, Overview and Applications
This article provides an elaborate overview of current research in extended
object tracking. We provide a clear definition of the extended object tracking
problem and discuss its delimitation to other types of object tracking. Next,
different aspects of extended object modelling are extensively discussed.
Subsequently, we give a tutorial introduction to two basic and well used
extended object tracking approaches - the random matrix approach and the Kalman
filter-based approach for star-convex shapes. The next part treats the tracking
of multiple extended objects and elaborates how the large number of feasible
association hypotheses can be tackled using both Random Finite Set (RFS) and
Non-RFS multi-object trackers. The article concludes with a summary of current
applications, where four example applications involving camera, X-band radar,
light detection and ranging (lidar), red-green-blue-depth (RGB-D) sensors are
highlighted.Comment: 30 pages, 19 figure
Subsampled Blind Deconvolution via Nuclear Norm Minimization
Many phenomena can be modeled as systems that preform convolution, including negative effects on data
like translation/motion blurs. Blind Deconvolution (BD) is a process used to reverse the negative effects
of a system by effectively undoing the convolution. Not only can the signal be recovered, but the impulse
response can as well. "Blind" signifies that there is incomplete knowledge of the impulse responses of an
LTI system. Solutions exist for preforming BD but they assume data is fully sampled. In this project we
start from an existing method [1] for BD then extend to the subsampled case. We show that this new
formulation works under similar assumptions. Current results are empirical, but current and future work
focuses providing theoretical guarantees for this algorithm.No embargoAcademic Major: Electrical and Computer Engineerin
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