title: Fast extended focused imaging in digital holography using a graphics processing unit.
abstract: We present a simple and effective method for reconstructing extended focused images in digital holography using a graphics processing unit (GPU). The Fresnel transform method is simplified by an algorithm named fast Fourier transform pruning with frequency shift. Then the pixel size consistency problem is solved by coordinate transformation and combining the subpixel resampling and the fast Fourier transform pruning with frequency shift. With the assistance of the GPU, we implemented an improved parallel version of this method, which obtained about a 300-500-fold speedup compared with central processing unit codes.
authors.affiliation: Shaanxi Key Laboratory of Optical Information Technology and the Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education, School of Science, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Le
authors.initials: L
authors.lastname: Wang
authors.forename: Jianlin
authors.initials: J
authors.lastname: Zhao
authors.forename: Jianglei
authors.initials: J
authors.lastname: Di
authors.forename: Hongzhen
authors.initials: H
authors.lastname: Jiang