Multiple-image encryption by two-step phase-shifting interferometry and spatial multiplexing of smooth compressed signal<xref rid="cpb_27_7_074205fn1" ref-type="fn">*</xref><fn id="cpb_27_7_074205fn1"> <label>*</label> <p>Project supported by the National Natural Science Foundation of China (Grant Nos. 61775121, 61307003, 61405122, and 11574311), Key R&D Program of Shandong Province, China (Grant No. 2018GGX101002), the Natural Science Foundation of Shandong Province, China (Grant No. R2016FM03), and the Fundamental Research Funds of Shandong University, China (Grant No. 2015GN031).</p> </fn>

Multiple-image encryption by two-step phase-shifting interferometry and spatial multiplexing of smooth compressed signal* *

Project supported by the National Natural Science Foundation of China (Grant Nos. 61775121, 61307003, 61405122, and 11574311), Key R&D Program of Shandong Province, China (Grant No. 2018GGX101002), the Natural Science Foundation of Shandong Province, China (Grant No. R2016FM03), and the Fundamental Research Funds of Shandong University, China (Grant No. 2015GN031).

Zhang Xue, Meng Xiangfeng^†, Wang Yurong, Yang Xiulun, Yin Yongkai

(color online) (a) Original ‘Lena’ with 64 × 64 pixels; (b) pixels distribution of (a); (c) the wavelet coefficients distribution of (a) after five-order Haar DWT; (d) the reordered smooth image in descending order of (a); (e) pixels distribution of (d); (f) the wavelet coefficients distribution of (d) after five-order Haar DWT.