傳統(tǒng)的光學(xué)加密方法分為兩類,一種是基于聯(lián)合變換相關(guān)器的加密方法,第二種是基于
匹配濾波相關(guān)器的加密方法。為了提高光學(xué)元件的衍射效率和系統(tǒng)的實(shí)際可操作性,本文綜合兩種傳統(tǒng)的加密方法的優(yōu)勢(shì),利用多重相位恢復(fù)算法的思想,對(duì)算法進(jìn)行改進(jìn),實(shí)現(xiàn)了在聯(lián)合變換相關(guān)器上的純相位加密方法,有效改善了識(shí)別圖像的質(zhì)量,并給出了計(jì)算機(jī)仿真和光學(xué)試驗(yàn)結(jié)果,證明了這種方法的正確性和可行性。
關(guān)鍵字: 圖像加密, 相關(guān)器, 雙相位
Abstract: The traditional optical encryption methods are classified into two kinds, one is based on the joint transform correlator, the second is based on the matched filter. In this paper, in order to enhance the diffraction efficiency of optical component and actually operability of the system, through colligating the advantages of both traditional encryption methods, utilizing the idea of multiple-phase recovery algorithm, we have improved the algorithm, came true pure phase encryption method on the join transform correlator, effectively ameliorated the quality of the image recognition, and took out the emulational and optical test results. We also prove that the identification on joint transform correlator by using simple-phase function is correct and feasible.
Keywords: Image Encryption, Correlator, Double Phase