Joint Bilateral Filter for Signal Recovery from Phase Preserved Curvelet Coefficients for Image Denoising

Thresholding of Curvelet Coefficients, for image denoising, drains out subtle signal component in noise subspace. In effect, it also produces ringing artifacts near edges. We found that the sensitivity phases — contrast to their magnitude reduces with higher level. Thus, we preserved phase coefficients below threshold at coarser scale and estimated corresponding by Joint Bilateral Filtering (JBF) technique. traditional hard thresholding, finest is using (BF). The proposed filtering approach exhibits better connectedness among edges, while removing granular denoised due thresholding. Finally, use Guided Image Filter (GIF) on Curvelet-based reconstructed (initial spatial domain) ensures preservation small information sharper edges textures detail final image. lower strength accelerates performance method over several state-of-the-art techniques provides comparable outcome levels.