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.
Results
Showing 1 to 20 of 73 for “"local features"”.
-
Visual detection and recognition using local features
… framework, where the objects are first localized with a sliding window detector before being identified. We make multiple contributions along this path. All of the contributions pertain to the central theme of local image features. We demonstrate improved object detection performance …
-
The visual inference of shape : computation from local features
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Psychology, 1982.
-
DEEP-LEARNING LOCAL FEATURES FOR PHOTOGRAMMETRIC APPLICATIONS AND VISUAL POSITIONING
Image matching is a crucial step in various photogrammetric and computer vision applications. Traditional handcrafted matching algorithms automatically identify correspondences between image pairs, correspondences that can be triangulated to create a sparse map of the environment, while estimating …
-
Parts-based models and local features for automatic speech recognition
… method of hidden Markov models (HMMs) and features derived from fixed, frame-based spectra (e.g. MFCCs) are discussed. Based on these problems, a set of desirable properties of an improved acoustic model are proposed, and we present a "parts-based" framework as an alternative. The …
-
Modeling for part-based visual object detection based on local features
… a semi-supervised machine learning technique on local image features to detect clusters of feature locations that are subsequently used as parts of the object model. The modeling process is exemplarily implemented for human faces. An evaluation on three known datasets shows that the automatically …
-
Investigating functional data with sharp local features with applications to spectroscopy
… this requires the study of curves with sharp local features, those features being peaks associated to given resonance frequencies in the spectra, and of which the intensity reflects the concentration of given chemical compounds. A challenge in this problem is to define an efficient measure of …
-
A multiscale computational framework for the simulation of local features in large structures
… numerical simulations. Resolving fine-scale features such as geometrical details, cracks, and localized nonlinearities with high fidelity is crucial for the accurate prediction of the response and service life of structural components. Three-dimensional models with detailed meshes and …
-
The Generalized Finite Element Method With Global-Local Enrichment Functions
… this limitation. It involves the solution of local boundary value problems using boundary conditions from a global problem defined on a coarse discretization. The local solutions are in turn used to enrich the global space using the partition of unity framework. This procedure allows the use …
-
Intrinsic Features of the Multisensory Cortical Area LRSS in the Ferret
… effects, none have evaluated the influence of local or columnar circuitry. The goal of the present study is to examine of local features of the ferret lateral rostral suprasylvian sulcus (LRSS), a multisensory cortex. Immunostaining revealed the cytoarchitectonic features of the LRSS: thick …
-
Matching sets of features for efficient retrieval and recognition
… represent a single example by the collection of local features or parts that comprise it. In computer vision in particular, local image features are a powerful way to describe images of objects and scenes. Their stability under variable image conditions is critical for success in a wide range of …
-
Exploiting object dynamics for recognition and control
… classifier based on the characteristic motion of local features across the sweep. It is shown that this motion model reveals structural information about the object that can be exploited for recognition. The main contribution of this thesis is a recognition system that extends invariant local …
-
Visual feature learning with application to medical image classification
Various hand-crafted features have been explored for medical image classification, which include SIFT and Local Binary Patterns (LBP). However, hand-crafted features may not be optimally discriminative for classifying images from particular domains (e.g. colonoscopy), as not necessarily tuned to …
-
Object recognition with latent Conditional Random Fields
… flexible constellations of parts conditioned on local observations. For each object class the probability of a given assignment of parts to local features is modelled by a Conditional Random Field (CRF). We propose an extension of the CRF framework that incorporates hidden variables and combines …
-
Preprocessing for content-based image retrieval
… salient regions in the image and extracting local features as a representation of the regions. The experiments show an improvement for retrieval by local features when compared with retrieval using global features from the whole image.<br/><br/>For situations where object retrieval is …
-
SIFT feature extraction on a Smartphone GPU using OpenGL ES2.0
SIFT describes local features in image used for object recognition in a vast array of application, such as augmented reality, panorama stitching. These applications are becoming very popular on Smartphones but also require considerable amount of computing power. GPUs offer a significant amount of …
-
An Extended Local Binary Pattern for Gender Classification
The face is one of the most important biometric features of humans, conveying race, identity, age, gender and facial expression information, among which gender plays a significant role in social interactions. An automatic gender recognition system has many applications in computer-human …
-
Feature extraction for range image interpretation using local topology statistics
… face, based on the extraction and matching of local features from the images. In recent years, approaches to interpret two-dimensional (2D) images based on local feature extraction have advanced greatly, for example, systems such as Scale Invariant Feature Transform (SIFT) can detect and …
-
Description of Coherent Structures in the Atmospheric Boundary Layer By Model Reduction of the Surface Pressure
… of turbine components. The coherence of these features suggests description by model reduction. To this end, an array of pressure transducers was deployed on the ground at Reese Technology Center in Lubbock, Texas, and the pressure fluctuations were recorded over nearly two diurnal cycles. A …
-
G-hash: Towards Fast Kernel-based Similarity Search in Large Graph Databases
… storage and fast search of the extracted local features from graph data. Using the hash table, we have developed a graph kernel function to capture the intrinsic similarity of graphs and for fast similarity query processing. We have demonstrated the utility of the proposed methods using …
Page 1 of 4