A new image denoising algorithm for laser active imaging

Aiming at the speckle noise in laser active imaging, a denoising algorithm combining improved wavelet threshold method with non-local mean(NLM) filtering is proposed. Firstly, noise analysis of laser active imaging is performed. Secondly, the speckle noise is converted into additive noise by logarithmic transformation. Thirdly, the image is decomposed into… (More)