Image encryption based on a grating generated by a reflection intensity map
| Autor: | Ramón Rodríguez-Vera, J. Apolinar Muñoz-Rodríguez |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
business.industry
Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Phase (waves) Image processing Grating Encryption Grayscale Atomic and Molecular Physics and Optics Intensity (physics) Reflection (mathematics) Optics Face (geometry) Computer Science::Multimedia business Computer Science::Cryptography and Security |
| Zdroj: | Journal of Modern Optics. 52:1385-1395 |
| ISSN: | 1362-3044 0950-0340 |
| DOI: | 10.1080/09500340512331313917 |
| Popis: | A virtual optical technique for image encryption and decryption is presented in this paper. The technique is carried out using optical operation and computational algorithms. In this technique, a grey-level image is captured by a charge-coupled device camera and encrypted using a linear grating superposed on the reflected intensity map of the object. The grating is generated as a fringe pattern by a computer algorithm. The reflected intensity map is determined using the grey level of the image. This reflected intensity map is included in the fringe pattern as an optical phase. It generates a grating, which is represented as a fringe pattern deformed according to the reflected intensity map. The decryption method is performed by a phase recovery method. The technique used here is a spatial synchronous method. This encryption and decryption technique has been used to encrypt real face images. To describe the accuracy of results obtained by this technique, the rms of error is calculated using decrypted and o... |
| Databáze: | OpenAIRE |
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