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Shape descriptors

ACCURATE AND ROBUST SHAPE DESCRIPTORS FOR THE IDENTIFICATION OF RIB CAGE STRUCTURES IN CT-IMAGES WITH RANDOM FORESTS

ACCURATE AND ROBUST SHAPE DESCRIPTORS FOR THE IDENTIFICATION OF RIB CAGE STRUCTURES IN CT-IMAGES WITH RANDOM FORESTS

... Index Terms— CT images, bone segmentation, thorax, random forests, shape descriptors. 1. INTRODUCTION There is an increasing interest in image-based anatomical models, exploiting diverse 3D volumes of ...

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Using Shape Descriptors for UAV Detection

Using Shape Descriptors for UAV Detection

... At first, we have combined the GFD based shape features with a neural network to test its accuracy in our context of detecting flying drones and discriminating birds with a steady camera[r] ...

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Density-Based Shape Descriptors and Similarity Learning for 3D Object Retrieval

Density-Based Shape Descriptors and Similarity Learning for 3D Object Retrieval

... existing descriptors can be rendered rotation-invariant by this ...of descriptors should be understood with caution as it comes with a certain loss of shape information [ 29 , 59 ...3D shape ...

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Robustness of Planar Shape Descriptors of Particles

Robustness of Planar Shape Descriptors of Particles

... 3. Test shapes and image simulation methods. The robustness of shape parameters can be tested using analytical, experimental or simulation techniques. Analytical techniques are extremely powerful because they can ...

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CAD assembly descriptors for knowledge capitalization and model retrieval

CAD assembly descriptors for knowledge capitalization and model retrieval

... different shape descriptors associated to a single shape is due to the fact that it has been demonstrated that there is no best shape descriptor for the comparison of each shape type ...

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Modeshapes recognition using Fourier descriptors: a simple SHM example

Modeshapes recognition using Fourier descriptors: a simple SHM example

... of shape attributes or features with good discriminative ...of shape descriptors should determine the distance between descriptors of two models as a meaningful measure of the underlying ...

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Retrieval of Remote Sensing Images with Pattern Spectra Descriptors

Retrieval of Remote Sensing Images with Pattern Spectra Descriptors

... Abstract: The rapidly increasing volume of visual Earth Observation data calls for effective content based image retrieval solutions, specifically tailored for their high spatial resolution and heterogeneous content. In ...

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Approximations of Shape Metrics and Application to Shape Warping and Empirical Shape Statistics

Approximations of Shape Metrics and Application to Shape Warping and Empirical Shape Statistics

... Learning shape models from examples, using them to recognize new instances of the same class of shapes are fascinating problems that have attracted the attention of many scientists for many ...random shape ...

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Estimating the Indexability of Multimedia Descriptors for Similarity Searching

Estimating the Indexability of Multimedia Descriptors for Similarity Searching

... Rather minor differences between the average query times were measured using the FLANN library and the hierarchical k-means tree. These flat average query times were acquired by tuning the parameters for each particular ...

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Integrated photometric descriptors for lighting quality research & recommendations

Integrated photometric descriptors for lighting quality research & recommendations

... useful descriptors of the luminous ...photometric descriptors is a necessary first step to the development of research programs to advance understanding of the effects of the luminous environment on human ...

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Orientation covariant aggregation of local descriptors with embeddings

Orientation covariant aggregation of local descriptors with embeddings

... In contrast, we achieve the covariant property for any method provided that it can be written as a match kernel. This holds for the Fisher vector, LLC, bag- of-words and efficient match kernels listed in [20]. Our method ...

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Modeshapes recognition using Fourier descriptors: a simple SHM example

Modeshapes recognition using Fourier descriptors: a simple SHM example

... (Fourier Descriptors) for comparing modeshapes with “local” similarities of higher interest than “global” similarities using nodal ...few descriptors changes to localise the ...

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Shape Interrogation

Shape Interrogation

... Summary. Shape interrogation methods are of increasing interest in geometric modeling as well as in computer ...allowed, shape interrogation has become recently an important tool for various other types of ...

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Dense trajectories and motion boundary descriptors for action recognition

Dense trajectories and motion boundary descriptors for action recognition

... same descriptors for KLT trajectories, i.e., the trajectory shape is represented by normalized displacement vectors and HOG, HOF, as well as MBH descriptors are extracted along the ...

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Challenging deep image descriptors for retrieval in heterogeneous iconographic collections

Challenging deep image descriptors for retrieval in heterogeneous iconographic collections

... content-based descriptors, relying on deep features, for heterogeneous data such as those available in cultural collections, when considering an image retrieval ...

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Reshaping Plant Biology: Qualitative and Quantitative Descriptors for Plant Morphology

Reshaping Plant Biology: Qualitative and Quantitative Descriptors for Plant Morphology

... and shape, root formation, and above- to below-ground biomass ratios are morphological traits that allow ecologists to make predictions about plant ecological strategies and overall community response to ...

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Towards Common Ground in SME: An Ontology of Method Descriptors

Towards Common Ground in SME: An Ontology of Method Descriptors

... method descriptors shows that each of these approaches shares common concepts with the others and also incorporates new concepts to characterize method constructs not addressed in the ...

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Image moments: Generic descriptors for decoupled image-based visual servo

Image moments: Generic descriptors for decoupled image-based visual servo

... (a) desired image where the object is parallel to the image plane), (b) desired image where the object is not parallel to the image plane), (c) initial image for a pure translational mot[r] ...

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Descriptors of Oxygen-Evolution Activity for Oxides: A Statistical Evaluation

Descriptors of Oxygen-Evolution Activity for Oxides: A Statistical Evaluation

... Figure 4. Mean absolute cross-validation (CV) errors (bars) and test errors (line) for the different QSARs. Relative OER activity prediction errors have units of standard deviations. Standard deviations in the MAE ...

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Evaluation of GIST descriptors for web-scale image search

Evaluation of GIST descriptors for web-scale image search

... local descriptors for each image, such as the popular SIFT descriptor ...these descriptors are very discriminant and invariant to local ...the descriptors into visual words (forming a visual ...

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