Fig. 4: Decryption results for different color object images with the PMH-SPD and Si-SPD applying both SPI and PSLI methods.
From: Optically programmable dual-band perovskite single-pixel detector for color image encryption

(i) The object images, (ii) SPI, PSLI, and decrypted results of the PMH-SPD, (iii) SPI and PSLI results of the Si-SPD, as well as SPI results of the Si-SPD equipped with long- and short-pass filters of the encrypted object a with same red and blue intensity, b with various composite red-blue colors and red-blue intensities