We have used phase-sensitive ultrashort-pulse interferometry to study the modifi cation of optical pulse propagation near the photonic band edges in colloidal crystals consisting of polystyrene spheres in water. A strong suppression of the group

Image Enhancement methods, Active Contour Without edges, Manual thresholding codes

Detecting faint curved edges in noisy images

A variational model to denoise an image corrupted by Poisson noise, Like the ROF model the model uses totalvariation regularization, which preserves edges