Search Results - "Mascarenhas, N.D.A."
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1
Super-Resolution Image Reconstruction using the ICM Algorithm
Published in 2007 IEEE International Conference on Image Processing (01-09-2007)“…Super-resolution image reconstruction is a powerful methodology for resolution enhancement from a set of blurred and noisy low-resolution images. Following a…”
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Conference Proceeding
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2
On the asymptotic variances of Gaussian Markov Random Field model hyperparameters in stochastic image modeling
Published in 2008 19th International Conference on Pattern Recognition (01-12-2008)“…This paper addrresses the problem of approximating the asymptotic variance of Gaussian Markov Random Field (GMRF) spatial dependency hyperparameters by…”
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Conference Proceeding -
3
Map-MRF Super-Resolution Image Reconstruction using Maximum Pseudo-Likelihood parameter estimation
Published in 2009 16th IEEE International Conference on Image Processing (ICIP) (01-11-2009)“…In this paper, we address the parameter estimation of a super-resolution image reconstruction approach following a maximum a posteriori probability (MAP)…”
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Conference Proceeding -
4
GSAShrink: A Novel Iterative Approach for Wavelet-Based Image Denoising
Published in 2009 XXII Brazilian Symposium on Computer Graphics and Image Processing (01-10-2009)“…In this paper we propose a novel iterative algorithm for wavelet-based image denoising following a Maximum a Posteriori (MAP) approach. The wavelet shrinkage…”
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5
Multilayer Perceptron Classifier Combination for Identification of Materials on Noisy Soil Science Multispectral Images
Published in XX Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2007) (01-10-2007)“…Classifier combination experiments using the multilayer perceptron (MLP) were carried out using noisy soil science multispectral images, which were obtained…”
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6
A novel pseudo-likelihood equation for Potts MRF model parameter estimation in image analysis
Published in 2008 15th IEEE International Conference on Image Processing (01-10-2008)“…This paper presents a novel pseudo-likelihood equation for the estimation of the Potts MRF model parameter on second-order neighborhood systems, allowing the…”
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7
A Hybrid Estimation Theoretic-POCS Method for Tomographic Image Reconstruction
Published in XVIII Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI'05) (2005)“…We present in this work a new method for the tomographic reconstruction with Poisson noise corrupted projections. The reconstruction method is a hybrid…”
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Iterative self-dual reconstruction on radar image recovery
Published in 2009 Workshop on Applications of Computer Vision (WACV) (01-12-2009)“…Imaging systems as ultrasound, sonar, laser and synthetic aperture radar (SAR) are subjected to speckle noise during image acquisition. Before analyzing these…”
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A Restoration and Extrapolation Iterative Method for Band-limited Fluorescence Microscopy Image
Published in XX Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2007) (01-10-2007)“…Optical microscopic images, especially with a nonconfocal microscope, are fundamentally limited because the optical transfer function (the Fourier transform of…”
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10
The linear attenuation coefficients as features of multiple energy CT image classification
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-09-2000)“…We present in this paper an analysis of the linear attenuation coefficients as useful features of single and multiple energy CT images with the use of…”
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Journal Article -
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Combining Methods to Stabilize and Increase Performance of Neural Network-Based Classifiers
Published in XVIII Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI'05) (2005)“…In this paper we present a set of experiments in order to recognize materials in multispectral images, which were obtained with a tomograph scanner. These…”
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The influence of the noise in the restoration of solar radio images using adaptive regularization techniques based on clustering
Published in Proceedings of the 17th International Conference on Pattern Recognition, 2004. ICPR 2004 (2004)“…This article describes the efficiency analysis of the new restoration algorithm applied to solar radio images and the influence that an additive noise has in…”
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13
Biological Image Restoration in Optical-Sectioning Microscopy Using Prototype Image Constraints
Published in Real-time imaging (01-12-2002)“…The deconvolution of images obtained by means of optical-sectioning widefield fluorescence microscopy, is a relevant problem in biological applications…”
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14
Multispectral image data fusion using projections onto convex sets techniques
Published in Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing (2002)“…The problem of image data fusion includes several techniques for data integration from different sensors about a given object. The process can be divided in…”
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15
Analysis of the robustness of iterative restoration methods with respect to variations of the point spread function
Published in Proceedings 2000 International Conference on Image Processing (Cat. No.00CH37101) (2000)“…It is known that digital image restoration is an ill-conditioned problem in the sense that small deviations like noise in the degraded image produce large…”
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16
Skeletonization of two-dimensional shapes via fast numerical calculation of vector fields
Published in Proceedings. 17th Brazilian Symposium on Computer Graphics and Image Processing (2004)“…We propose an approach for efficient two-dimensional skeletonization of binary shapes through numerical calculation of vector fields and curvature estimation…”
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17
A comparison of POCS algorithms for tomographic reconstruction under noise and limited view
Published in Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing (2002)“…We present in this work a comparison among four algorithms for transmission tomography. The algorithms are based on the formalism of POCS (Projection onto…”
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18
Analysis of medical image sequences by recursive polynomial registration
Published in Proceedings XIV Brazilian Symposium on Computer Graphics and Image Processing (2001)“…This paper presents a new technique of polynomial image registration, applying recursive least squares techniques for the estimation of the mapping function…”
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19
Evaluating an adaptive windowing scheme in speckle noise MAP filtering
Published in Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing (2002)“…Synthetic aperture radar (SAR) images are corrupted by speckle noise, which degrades the quality and interpretation of the images. Speckle removal provides a…”
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20
Image morphing applied to 3D reconstruction of coronal loops
Published in 16th Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2003) (2003)“…We present a new approach for 3D reconstruction of X-ray tomographic images of a magnetic structure, called coronal loop, observed on the solar atmosphere by…”
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