Correction of gradient echo images for first and second order macroscopic signal dephasing using phase derivative mapping.
H. de LeeuwChris J. G. BakkerPublished in: NeuroImage (2012)
Keyphrases
- image data
- image features
- edge detection
- image database
- gaussian white noise
- three dimensional
- image analysis
- object recognition
- hessian matrix
- image classification
- input image
- image retrieval
- high frequency
- multidimensional signals
- segmentation method
- image gradient
- pixel intensities
- gradient information
- phase information
- directional derivatives
- gradient domain
- denoising
- frequency domain
- instantaneous frequency
- diffusion coefficient
- partial derivatives
- distortion correction
- multiresolution
- low signal to noise ratio
- nonlinear filters
- image structure
- test images