Fig. 1. Schematic of the OSH system.OSH系统原理图

Fig. 2. Encrypted image: (a) Section image 1, z₁ = 10 mm; (b) section image 2, z₂ = 12 mm; (c) section image 3, z₃ = 15 mm; (d) the arrangement of multi-section images. 加密图像　(a) 切片1, z₁ = 10 mm; (b) 切片2, z₂ = 12 mm; (c) 切片3, z₁ = 15 mm; (d)多切片的排列方式

Fig. 3. Annular pupil and the intensity response curves of different ε: (a) The transmission distribution diagram of annular pupil with ε = 0.5; (b) normalized intensity response curve; (c) intensity response curve. 环形光瞳和不同ε的归一化强度响应和强度相应曲线　(a) 环形光瞳(ε = 0.5)的透过率分布图; (b) 归一化强度响应曲线;(c) 强度响应曲线

Fig. 4. Encryption results: (a) Encrypted cosine-hologram; (b) encrypted sine-hologram.加密结果　(a) 余弦加密全息图; (b) 正弦加密全息图

Fig. 5. Gray histogram: (a) Gray histogram of encrypted cosine-hologram; (b) gray histogram of encrypted sine-hologram.灰度直方图　(a) 余弦加密全息图的灰度直方图; (b) 正弦加密全息图的灰度直方图

Fig. 6. Decryption results of different sections: (a) Section 1; (b) section 2; (c) section 3.不同切片的解密结果　(a) 切片1; (b) 切片2; (c) 切片3

Fig. 7. Incorrect decryption results: (a) The C_c curve of varies with δd; (b) and (c) decryption result of δd = 0.1 and 0.1 mm, respectively; (d) the C_c curve of varies with δλ; (e) and (f) decryption result of δλ = 0.1 and 1 nm, respectively. 错误解密结果　(a) 相关系数C_c随δd变化的曲线图; (b) 和 (c) δd = 0.01和0.1 mm时的解密结果; (d) 相关系数C_c随δλ变化的曲线图; (e) 和 (f) δλ = 0.1和1 nm时的解密结果

Fig. 8. Decryption result of single-encrypted hologram: (a) Decryption result of encrypted sine-hologram; (b) decryption result of encrypted cosine-hologram.单幅加密全息图的解密结果　(a) 正弦加密全息图的解密结果; (b) 余弦加密全息图的解密结果

Fig. 9. Simulation results of anti-shear performance: (a) and (b) The sine- and cosine-holograms with 25% occlusion; (c) decryption result with 25% occlusion; (d) and (e) the sine- and cosine-holograms with 50% occlusion; (f) decryption result with 50% occlusion; (g) and (h) the sine- and cosine-holograms with 75% occlusion; (i) decryption result with 75% occlusion.抗剪裁性能模拟结果　(a) 和 (b) 信息丢失25%的正余弦加密图像; (c) 信息丢失25%后的解密结果; (d) 和 (e) 信息丢失50%的正余弦加密图像; (f) 信息丢失50%后的解密结果; (g) 和 (h) 信息丢失75%的正余弦加密图像; (i) 信息丢失75%后的解密结果.

Fig. 10. Simulation results of anti-noise performance: (a), (b) and (c) Gaussian noise with variance of 0.02, 0.05 and 0.08; (d), (e) and (f) salt and pepper noise with variance of 0.02, 0.05 and 0.08.抗噪声性能模拟结果　(a), (b) 和 (c) 方差为0.02, 0.05和0.08的高斯噪声; (d), (e) 和 (f) 方差为0.02, 0.05和0.08的椒盐噪声