Single-frame image super-resolution through contourlet learning
EURASIP Journal on Applied Signal Processing
Multispectral images fusion by a joint multidirectional and multiresolution representation
International Journal of Remote Sensing
Vessel enhancement filter using directional filter bank
Computer Vision and Image Understanding
The Nonsubsampled Contourlet Transform for Enhancement of Microcalcifications in Digital Mammograms
MICAI '09 Proceedings of the 8th Mexican International Conference on Artificial Intelligence
Multichannel texture segmentation using bamberger pyramids
Journal on Image and Video Processing
Iris-based personal authentication using a normalized directional energy feature
AVBPA'03 Proceedings of the 4th international conference on Audio- and video-based biometric person authentication
Iris feature extraction and matching based on multiscale and directional image representation
Scale Space'03 Proceedings of the 4th international conference on Scale space methods in computer vision
SAR image despeckling using undecimated directional filter banks and mean shift
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
A class of 2D recursive filters with two-directional selectivity
ICANCM'11/ICDCC'11 Proceedings of the 2011 international conference on applied, numerical and computational mathematics, and Proceedings of the 2011 international conference on Computers, digital communications and computing
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A new directional filter bank for image analysis and classification is proposed. This paper introduces an improved structure in order to visualize subband outputs of the directional filter banks, while retaining the attractive properties of the original directional filter banks such as 1-D separable filtering, perfect reconstruction, and maximal decimation. Using this structure, any arbitrary 2/sup n/ band directional filter bank can be implemented by cascading simple directional filter bank blocks, unlike the original structure that needs a parallel structure for visualizing subband outputs. Also, in order to have nondistorted phase information in the subbands for visualization, both FIR and IIR filter prototypes that can be implemented efficiently are provided for linear phase filtering. This paper shows the approach proposed here can be applied to image analysis and classification.