Non-subsampled Contourlet Transform-Based Image Denoising in Ultrasound Images Using Elliptical Directional Windows and Block-Based Noise Estimation.
J. Jai Jaganath BabuGnanou Florence SudhaPublished in: ICACNI (2013)
Keyphrases
- contourlet transform
- ultrasound images
- image denoising
- noisy images
- directional filter banks
- denoising
- noise level
- denoising methods
- speckle noise
- natural images
- total variation
- edge detection
- image processing
- partial differential equations
- additive noise
- multiscale
- wavelet coefficients
- denoising algorithm
- wavelet domain
- noise model
- image deblurring
- object recognition
- noise reduction
- high frequency
- low frequency
- discrete wavelet transform
- motion estimation
- feature vectors
- translation invariant