0000000000594145

AUTHOR

Marc F. Toubin

showing 3 related works from this author

<title>Multiresolution description of range images through 2D quincunx wavelet analysis</title>

1999

In this paper, we present a method for performing a multi- scale analysis on range images by using the wavelet transform, that is capable of revealing multi-resolution information. An accurate non-contact optical system based upon laser triangulation is used to determine the depth information of the object being scanned. The resulting range image is treated as a gray-level image by using a multi- resolution approach based on the generalization of the cascade algorithm using the quincunx wavelet transform. The quincunx wavelet assures very fine analysis. This method allows reconstruction of non-subsampled images that correspond to decompositions previously done at chosen scales. Multi-resolu…

business.industryStationary wavelet transformMultiresolution analysisComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONWavelet transformCascade algorithmIterative reconstructionWaveletQuincunxPolygon meshComputer visionArtificial intelligencebusinessMathematicsWavelet Applications VI
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Multiscale analysis of range image: its use for growth increment characterization

1999

A new image-processing approach for object analysis in life and earth sciences is presented. This approach is based on a multireso- lution algorithm in image processing. A clamshell surface has been digi- tized using a noncontact optical sensor based on laser triangulation. The 3-D surface obtained constitutes an image that can be characterized by multiresolution analysis. The application of this method to the study of a bivalve shell surface (Unio sp., Recent Atlantic, Holocene) allowed the various growth increments and their potential relationship with environ- mental constraints to be measured. The algorithm used in this paper is based on the wavelet transform theory. © 1999 Society of P…

Surface (mathematics)business.industryComputer scienceMultiresolution analysisGeneral EngineeringWavelet transformImage processingAtomic and Molecular Physics and OpticsImage (mathematics)Characterization (materials science)Range (mathematics)WaveletComputer visionArtificial intelligencebusinessOptical Engineering
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Multi-scale analysis of shell growth increments using wavelet transform

1999

Abstract Shell increments contain information related to the evolution of the environment in which the organism grew during its biomineralization. To extract the information from variations in shell topography, a new and promising technique is presented, involving multi-scale analysis of the shell topography using a B-spline wavelet transform. An accurate non-contact optical system, based on laser triangulation, is used to map the shell surface. The resulting range image is treated as a grey-level image by using a multi-resolution approach based on the generalization of the cascade algorithm. This method allows reconstruction of non-subsampled images that correspond to the projection onto t…

Scale (ratio)business.industryB-splineShell (structure)Wavelet transformPattern recognitionCascade algorithmScale analysis (statistics)Computer visionArtificial intelligenceComputers in Earth SciencesProjection (set theory)Envelope (mathematics)businessInformation SystemsMathematicsComputers & Geosciences
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