Combined filtering Method on the Sphere
Original image (Syncrotron emission simulation).
Simulated noise data (Sigma noise = 5.).
Combined Filtering Method (5 sigma thresholding), based on pyramidal wavelet
on the sphere and pyramidal curvelet on the sphere .
Residual (i.e. simulated data - filtered data).
One face of the Healpix Syncrotron image representation (face 5).
a) original image;
b) noisy image;
c) Denoised image using the combined filtering method;
d) Residual (i.e. b-c).