Recent studies considered that the former′s formation was resulted from the accretion of continental margins, occured in Late Riphean, Middle Late Cambrian, Middle Late Ordovician, and Middle Late Silurian; and the later consists of Variscan and Indosinian fold belts, resulted from the continental collision.

Image denoising based on adaptive soft-threshold and edge enhancement;

Spectral preservation image fusion algorithm based on edge enhancement

During the edge enhancement phase,the Hopfield neural network is introduced to make up for missed edges and clear out false edges step by step via computing the energy function iteratively f.

Then this nonlinear diffraction property is applied in a coherent image processing system to obtain the real-time image edge-enhancement operation without reversing the signal-to-pump beam ratio.