A novel SAR image denoising scheme based on quad-tree complex wavelet packet transform(QCWPT) is presented using local neighborhood window threshold method.

The detection algorithm of bubbles in safety glass image based on local region threshold;

In order to restore the binary image information from the gray character image with noise and distortion through the filtering method, an adaptive binarization filtering algorithm is put forward based on the combination of adaptive filtering with local threshold binarization.

Based on operators for edge feature detection, a new method of adaptive threshold selection is proposed which combines the local threshold with global threshold selection.

They are improved bayesian image denoising based on wavelets,image denoising based on lifting wavelet and subbands adaptive threshold,wavelet image denoising base on local threshold.