Ideal Contrast Secret Image Sharing Using Reversing
Huang Youpeng · Dianzi xuebao · 2010
In visual secret sharing(VSS) schemes,the contrast of reconstructed image is much lost.A novel VSS scheme with reversing is presented.It can achieve really ideal contrast within(the ceiling integer of) m/h encoding runs,where m and h are respectively the number of all columns and the number of whole-white columns in the basis matrix for white pixels encoding.It encodes a secret image block by block and no pixel expansion occurs.A block consists of consecutive m pixels with same type,which means that m pixels together join into each encoding step.The proof of its correctness and security,the experimental results,analyses and comparisons are also shown.High encoding efficiency and low system capacity are its main advantages.