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 15 of 15 for “"Affine transformation"”.
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Video Mosaicking Using Ancillary Data to Facilitate Size Estimation
… 5) mosaic accuracy is refined by estimating an affine transformation to align overlapping frames; 6) affine transformation approximations between overlapping video frames are used to reduce image noise through super-resolution; 7) original orientation data are corrected given the refined …
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Statistical Recursive Estimation Algorithms for Speaker Adaption
… of tree-structured linear regression and affine transformation parameters. This technique has the advantages of accommodating flexible forms of transformation functions as well as prior probability density functions. To balance between model complexity and best goodness of fit to …
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Planar visual fusion scintigraphy
… image. The validity of using one set of affine transformation parameters for registering all patient data has been confirmed with preliminary data. Results using patient data confirm registration accuracy to within .95 cm on average and 2.35 cm as the greatest amount of error. Error was …
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Motion compensation from limited data for reference-constrained image reconstruction
… accurate motion parameter estimation for an affine transformation model and a nonrigid deformable model.
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Content based image pose manipulation
… proposes the application of space-frequency transformations to the domain of pose estimation in images. This idea is explored using the Wavelet Transform with illustrative applications in pose estimation for face images, and images of planar scenes. The approach is based on examining the …
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Theoretical and practical aspects of evolutionary algorithms with application to the partitioning of multivariate self-affine time series
… problem of partitioning a multivariate selfaffine time series with unknown and time-varying joint distribution is considered. The aim is to completely partition the time series, possibly of high dimension, into disjoint, contiguous subseries at one timescale that are similar to subseries at …
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Positional accuracy in a natural resource database: comparison of a single-photo resection versus affine registration
… maps and aerial photographs followed by an affine transformation, and manual digitizing from aerial photographs while applying a single-photo space resection. Two study sites, one in low terrain relief and one in high terrain relief, were used to examine the effects of terrain on positional …
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Fast Registration of Tabular Document Images Using the Fourier-Mellin Transform
Image registration, the process of finding the transformation that best maps one image to another, is an important tool in document image processing. Having properly-aligned microfilm images can help in manual and automated content extraction, zoning, and batch compression of images. An image …
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Direction of arrival estimation for spinning antenna based electronic intelligence systems
… estimation techniques and by performing a linear transformation and an affine transformation on the maximum likelihood (ML) estimator. Using Monte Carlo simulation and real radar data, we demonstrate that: the proposed biased DOA estimators outperform the mean square error (MSE) limit specified by …
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Single digital-photo correction for a GIS application and error analysis
… errors in uncorrected photos were tested by the affine transformation from UTM to photo coordinates by control points. Estimated error for the Prentiss photo was 14.599 meters and that for the Blacksburg photo was 11.252 meters. Due the poor distribution of control and test points, estimated …
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Enhancement of the Fynbos Leaf Optical Recognition Application (FLORA-E)
… processing and were chosen because of their affine transformation invariance and low computational complexity, making them suitable for real time classification applications. The resulting classification solution, designed from experimentation on the three techniques under investigation, is a …
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Registration and categorization of camera captured documents
… methods work with scanned documents under affine transformation. Literature in document image retrieval addressed categorization of documents based on text, figures, etc. However, the scalability of existing document categorization methodologies based on logo identification is very limited. …
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Kinematics of The Human Shoulder Complex: Model Registration, X Ray Videoradiography and Soft Tissue Artefacts
… (PD) of the deformation gradient tensor from the affine transformation. Using the proposed registration method, the need for palpated skeletal landmarks and scaling was eliminated. This has the benefit of accurately registering the model to the OMC data regardless of palpation experience. …
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Image Based View Synthesis
… After automatically recovering the geometric transformations between these images, a series of photo-realistic virtual views can be rendered and a virtual environment covered by these several static cameras can be synthesized. This image-based approach has applications in object recognition, …
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Correspondence among connectomes as combinatorial optimization
… registration is based on finding one global affine transformation that minimizes their differences. Unfortunately, this approach fails to reconcile local differences between the tractograms. In contrast to transformation-based registration methods, we propose the concept of tractogram …