The theoretical analysis and experimental results of real time edge enhanced optical correlation pattern recognition via a Ce∶KNSBN photorefractive crystal in the coherent matched filter system are given.

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.

Remote image change-detection method based on edge enhancement;

Under certain conditions a Laplacian operator is formed on the transform plane because of the Phase conjugation effeCt inside the crystal,so that the edge enhancing image is obatined on the image plane at last.

This paper proposes a new filter for edge enhancing of noisy image, which is called as winsorized mean filter (WMEN, W—filter).

The image edge feature is extracted by using dyadic wavelet transform in this paper,and according to edge correlation theory,the edge feature points and noise can be distinguished,then image edge feature in multiscale are integrated based on cross-scale transfer characteristic of wavelet transform module.