An integrated method based on optical and digital image processing is presented to suppress speckle in digital holography. A spatial light modulator is adopted to introduce random phases to the illuminating beam. Mult...An integrated method based on optical and digital image processing is presented to suppress speckle in digital holography. A spatial light modulator is adopted to introduce random phases to the illuminating beam. Multiple holograms are reconstructed and superimposed, and the intensity is averaged to smooth the noise. The adaptive algorithm based on the nonlocal means is designed to further suppress the speckle. The presented method is compared with other methods reduction is improved, and the proposed method is effective The experimental results show that speckle and feasible.展开更多
Take bronze mirror, one can be properly dressed. Take tradition asbronze mirror, we can know some problems of urban planning and designin modern cities. This article is intended to relatively analyse theinadequate spa...Take bronze mirror, one can be properly dressed. Take tradition asbronze mirror, we can know some problems of urban planning and designin modern cities. This article is intended to relatively analyse theinadequate space in modern cities on the basis of the traditional ideas andmeans recaardincf space in 9 aspects in order to seek the ways of reform.展开更多
基金supported by the National Natural Science Foundation of China(No.61177018)the Program for New Century Excellent Talents in University(No.NECT-11-0596)+1 种基金the Key Program of Beijing Sci-ence and Technology Plan(No.D121100004812001)Beijing Nova Program(No.2011066)
文摘An integrated method based on optical and digital image processing is presented to suppress speckle in digital holography. A spatial light modulator is adopted to introduce random phases to the illuminating beam. Multiple holograms are reconstructed and superimposed, and the intensity is averaged to smooth the noise. The adaptive algorithm based on the nonlocal means is designed to further suppress the speckle. The presented method is compared with other methods reduction is improved, and the proposed method is effective The experimental results show that speckle and feasible.
文摘Take bronze mirror, one can be properly dressed. Take tradition asbronze mirror, we can know some problems of urban planning and designin modern cities. This article is intended to relatively analyse theinadequate space in modern cities on the basis of the traditional ideas andmeans recaardincf space in 9 aspects in order to seek the ways of reform.
