Double-image encryption method based on interference and logic mapping

• Main Authors: SUI LIANSHENG, ZHANG XIAO, ZHAO XIAOYU, DU CONG
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2019
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

The invention discloses a double-image encryption method based on interference and logic mapping. The double-image encryption method includes the steps: splicing an image O1 (mu, upsilon) and an imageO2 (mu, upsilon) into an image Oe (mu, upsilon); generating a sequence S1, a sequence S2 and a sequence S3 based on logic mapping; scrambling the image Oe (mu, upsilon) by using the sequence S1; obtaining an image Oe '(mu, upsilon); decomposing the image Oe '(mu, upsilon) into an image O1' (mu, upsilon) and an image O2 '(mu, upsilon); calculating a pure phase mask exp (jM1 (x, y)) and a pure phase mask exp (jM2 (x, y)) in the image O1 '(mu, upsilon); scrambling the pure phase mask exp (jM1 (x, y)) by using the sequence S2 to obtain a mask exp (jM1 '(x, y)); and scrambling the pure phase maskexp (jM2 (x, y)) by using the sequence S3 to obtain a mask exp (jM2 '(x, y)), and carrying out inverse free space wave propagation on the image O2' (mu, upsilon) twice to obtain a ciphertext image V (xi, eta). The double-image