Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 189 for “"histograms"”.
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Feature histograms for content-based image retrieval
Die ständig wachsende Menge an verfügbaren Multimediadaten erfordert neuartige Methoden, die einen gezielten Zugriff auf diejenigen Daten ermöglichen, an denen man interessiert ist. Insbesondere hinsichtlich visueller Dateninhalte existiert noch keine befriedigende Lösung. Der klassische Ansatz - …
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Calculating chi-squared test statistics for weighted histograms
… test, is commonly used to confirm whether histograms differ from a theoretical distribution. The chi-squared test is also often used to compare two histograms, such as histograms produced by experiments and simulations. This report describes the implementation of two such test statistics …
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Performance Analysis of a Binary-Tree-Based Algorithm for Computing Spatial Distance Histograms
The environment is made up of composition of small particles. Hence, particle simulation is an important tool in many scientific and engineering research fields to simulate the real life processes of the environment. Because of the enormous amount of data in such simulations, data management, …
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Real-Time Low-Resolution Face Recognition using Local Binary Pattern Histograms, Eigenface, and Fisherface Algorithms
… to process it using the Local Binary Pattern Histograms (LBPH), Eigenface, and Fisherface algorithms with image preprocessing using Contrast Limited Adaptive Histogram Equalization (CLAHE) technique. The face database in this system can be updated through a standalone Android application (app) …
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Multi-Modal Recognition of Manipulation Activities through Visual Accelerometer Tracking, Relational Histograms, and User-Adaptation
Activity recognition research in computer vision and pervasive computing has made a remarkable trajectory from distinguishing full-body motion patterns to recognizing complex activities. Manipulation activities as occurring in food preparation are particularly challenging to recognize, as they …
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Smooth Interactive Visualization
… a discontinuous first derivative. For example, histograms are a non-smooth visualization of density. Not only are histograms non-smooth visually, but they are also non-smooth over their parameter space, as they change abruptly in response to smooth change of bin width or bin offset. For large …
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Unsupervised Classification of Music Signals: Strategies Using Timbre and Rhythm
… tool is provided which produces a series of histograms containing beat and sub-beat information throughout the course of a musical recording. These histograms are then shown to be useful in the analysis of synthesized rhythms and real music. Additionally, a novel method based on the …
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An investigation into viewpoint invariant pedestrian recognition for surveillance systems
… The study investigates basic models, color histograms and region based histograms, to gain intuition about the appearance models as well as create new baseline results for evaluating future appearance models. This insight is then used to create an appearance model based on large-margin …
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Using the Earth Mover's Distance for perceptually meaningful visual saliency
… measures have on detecting saliency. Equi-width histograms, which have constant bin size, equi-depth histograms, which have constant density per bin, and diagonal histograms, whose bin widths are determined from constant diagonal portions of the empirical cumulative distribution function (ecdf), …
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Size is everything : universal features of quasar microlensing with extended sources
… (negative parity). By looking at magnification histograms of the convolutions and using chi-squared tests to determine the number of observations that would be necessary to distinguish histograms associated with different disk models, we find that, for circular disk models, the microlensing …
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Robust Event Detection and Retrieval in Surveillance Video
… (people and bags), which is combined with color histograms for tracking. We use shape symmetry analysis and color histograms to detect people carrying bags. Our experiments demonstrate the ability to search for instances of events according to specific attributes in large video sequences.
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A Dual-Pump CARS System for the Simultaneous Detection of Nitrogen and Methane
… from the cylinder of a firing DING engine. Histograms of the integrated intensity ratio from these measurements show a broad distribution of methane concentrations.
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Investigation of new feature descriptors for image search and classification
… descriptor is introduced by concatenating the Histograms of Oriented Gradients (HOG) of the component images produced by applying Gabor filters in multiple scales and orientations to encode shape information. Second, the GHOG descriptor is analyzed in six different color spaces and grayscale to …
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A color identification system based on class-oriented adaptive color space quantization
… objects. Many proposed methods use color histograms as representations of color images. Most of these methods depend on proper quantization of the color space. In our system, a novel adaptive color space quantization scheme has been employed. The method is class-oriented and is integrated …
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Recognition and matching in the presence of deformation and lighting change
… for improving specular object recognition. Histograms are a powerful statistical representation for keypoint matching and content based image retrieval. The <EM>earth mover's distance</EM> (EMD) is an important perceptually meaningful metric for comparing histograms, but it suffers from high …
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Image statistics and the perception of surface reflectance
… surfaces, we find that statistics of intensity histograms and histograms of filtered outputs are indicative of the diffuse surface reflectance. We compare the performance of a learning algorithm that employs these image statistics to human performance in two psychophysical experiments. In the …
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Fast human detection with cascaded ensembles
… computes locally normalized gradient orientation histograms over blocks of size 16x16 pixels representing a detection window. The block histograms within the window are then concatenated. The resulting feature vector is powerful enough to detect people with 88% detection rate at 10 -4 false …
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Novel color and local image descriptors for content-based image search
… integrates the Haar wavelet transform and the Histograms of Oriented Gradients (HOG), is presented for extracting both shape and local information for image classification. Next, a novel three Dimensional Local Binary Patterns (3D-LBP) descriptor is proposed for color images by encoding both …
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Multifrequency Scintillation in the Polar Caps
… Bay Incoherent Scatter Radar (RISR), creating histograms of the total scintillation data acquired, and by examining CERTO sigma_phi data results with respect to elevation angle. This work concludes that detrending scintillation data at frequencies other than L-band is not a trivial process and …
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