H
Hsuan T. Chang
Researcher at National Yunlin University of Science and Technology
Publications - 78
Citations - 1133
Hsuan T. Chang is an academic researcher from National Yunlin University of Science and Technology. The author has contributed to research in topics: Image quality & Holography. The author has an hindex of 15, co-authored 76 publications receiving 1093 citations. Previous affiliations of Hsuan T. Chang include Chaoyang University of Technology & National Chung Cheng University.
Papers
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Multiple-image encryption and multiplexing using a modified Gerchberg-Saxton algorithm and phase modulation in Fresnel-transform domain.
TL;DR: A new technique, based on a modified Gerchberg-Saxton algorithm (MGSA) and a phase modulation scheme in the Fresnel-transform domain, is proposed to reduce cross talks existing in multiple-image encryption and multiplexing.
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Multiple-phase retrieval for optical security systems by use of random-phase encoding
TL;DR: The technique of the multiple phase encoding for optical security and verification systems is presented, based on a 4-f optical correlator, and according to the simulation results, two and three phase masks are enough to design an efficient security verification system with 64 and 32 phase levels, respectively.
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Fast double-phase retrieval in Fresnel domain using modified Gerchberg-Saxton algorithm for lensless optical security systems.
TL;DR: A novel fast double-phase retrieval algorithm for lensless optical security systems based on the Fresnel domain is presented, in which two cascaded Fresnel transforms are replaced by one Fourier transform with compensations to reduce the consumed computations.
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Wavelength multiplexing multiple-image encryption using cascaded phase-only masks in the Fresnel transform domain
TL;DR: A method of wavelength multiplexing based on a modified Gerchberg-Saxton algorithm (MGSA) and a cascaded phase modulation scheme in the Fresnel transform domain to reduce the cross talk in the multiple-image-encryption framework is proposed.
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Image watermarking by use of digital holography embedded in the discrete-cosine-transform domain
Hsuan T. Chang,Chung L. Tsan +1 more
TL;DR: A method in which the hologram is superposed on the discrete-cosine-transform domain of the content image is proposed to significantly improve Takai and Mifune's method and greatly reduce the degradation on the superposed image, which is the major drawback in the method.