(k,n)真彩色扩展可视分存技术

(k,n) Extended Visual Secret Sharing Scheme with Colored Cover Images

针对目前彩色扩展可视分存方案(EVSS)的像素膨胀问题,本文在灰度(k,n)-EVSS方案基础上,给出一种通过修改黑白(k,n)可视分存方案(VSS)来构造真彩色的(k,n)方案的方法.用该方法构造出的可视分存方案,n个分存图具有不同意义的彩色图像,并且像素膨胀与黑白(k,n)-VSS方案相同.

To solve the pixel expansion problem in extended colored visual secret sharing scheme （EVSS scheme）, a new way to construct （k, n） extended visual secret sharing scheme with colored cover images by modifying black-white （k, n） visual secret sharing scheme （VSS scheme）, based on the gray （k, n）-EVSS scheme, is proposed in this paper. The cover images of the EVSS scheme constructed in this way are n meaningful colored images, and the pixel expansion is the same as that for black-white （k, n）-VSS scheme.