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A general progressive secret image sharing construction method
یک روش ساخت و ساز به اشتراک گذاری تصویر مخفی پیشرو-2019 Classic secret image sharing (SIS) including polynomial-based SIS, visual secret sharing (VSS), linear congruence
(LC)-based SIS and so on, generally has the shortcoming of ‘‘all-or-nothing’’, which is mainly caused by that most
of their ideas are borrowed from secret data sharing designed for data rather than image. Progressive secret image
sharing (PSIS) has the feature that the more shadows the better recovered secret image quality. In this paper, we
introduce a general PSIS construction method with no pixel expansion from classic ‘‘all-or-nothing’’ SIS. Based
on our PSIS construction method, three PSIS algorithms with selective progressive thresholds are extended from
classic SIS schemes, respectively. Experiments are provided to demonstrate the efficiency of our method in terms
of illustrations and analyses. Keywords: Secret image sharing | Progressive secret image sharing | Polynomial-based secret image sharing | Visual cryptography | Linear congruence |
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